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编程技巧20法(11-20)
@7 g% x. q1 r! N 徐景周; a, z# m$ p: t( }0 N/ `* _
日期:2002-09-12
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11. 如何判断当前操作系统的版本
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//------------------------------------------------------------------------------------------------
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: a# ]6 @' J+ W5 E; F# k. Z//判断操作系统涵数及变量3 W9 ~) ^% E2 y
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typedef enum tagWin32SysType{2 q! ^! O! L: J n( F
Windows32s,
0 i$ {9 }5 }/ R9 v WindowsNT3,
7 R: q- x7 O' T6 l7 q$ P Windows95,- b, Q) Y* d* m+ R4 { h0 w! V
Windows98,
) k# b* ~1 ]* W' V- I) r WindowsME,
6 U5 W0 N. }& i. N% Q8 M0 \ WindowsNT4,
5 d- t& ^5 \7 \; F Windows2000,) K j- z& D' y! E
WindowsXP
) D0 V4 u3 I) i0 `3 O$ a6 y}Win32SysType;
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; Y5 j; |6 B$ ^; r* C//判断操作系统涵数及变量,jingzhou xu* \$ j$ e; f- C# }& `$ X+ o3 B
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Win32SysType IsShellSysType()
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Win32SysType ShellType;; V8 y l% h8 c0 l" V
DWORD winVer;" Y! j, l R$ o0 n6 {3 `7 j' k7 B, h
OSVERSIONINFO *osvi;
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6 d" M2 k5 l: D A( O winVer=GetVersion();
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7 s* O8 e7 e# [& P4 J if(winVer<0x80000000){/*NT */
( v$ a- L" f: u4 h2 B ShellType=WindowsNT3;& b: M: V. F- U
osvi= (OSVERSIONINFO *)malloc(sizeof(OSVERSIONINFO));+ [6 y5 ^: X9 _ ?
if (osvi!=NULL){$ c" s* |3 e! z9 G5 |+ B
memset(osvi,0,sizeof(OSVERSIONINFO));0 F+ X0 F/ S$ n# `0 S# d+ ~
osvi->dwOSVersionInfoSize=sizeof(OSVERSIONINFO);- l" T7 ^. y, u+ m! f
GetVersionEx(osvi);
+ O9 ~7 f/ l K% C, ~7 v9 Q if(osvi->dwMajorVersion==4L)ShellType=WindowsNT4;! S. f3 R! Q! a( J P- u
else if(osvi->dwMajorVersion==5L&&osvi->dwMinorVersion==0L)ShellType=Windows2000;9 F$ d! N7 Z8 S. _
else if(osvi->dwMajorVersion==5L&&osvi->dwMinorVersion==1L)ShellType=WindowsXP;8 l+ C- y- b3 N9 w) H" K1 k, s
free(osvi);: o E' T, W* m& ^% Y# c9 ]4 i" i) u
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else if (LOBYTE(LOWORD(winVer))<4)
& U; s% L% T( y4 ^ ShellType=Windows32s;/ j5 k9 ^$ W+ E; D1 ]9 y, F
else{7 v- B. p7 y) F" L- V1 P6 S% |
ShellType=Windows95;/ P8 n& P0 J2 k5 ^$ w
osvi= (OSVERSIONINFO *)malloc(sizeof(OSVERSIONINFO));
+ [& i" x* a% b& x7 m if (osvi!=NULL){' a5 b/ g& j; v9 [& }$ C7 G
memset(osvi,0,sizeof(OSVERSIONINFO));
( {2 L6 k$ s) p6 Q2 {4 w osvi->dwOSVersionInfoSize=sizeof(OSVERSIONINFO);
) g6 ^' R4 E' S6 o0 B GetVersionEx(osvi);
4 [% I) |6 e3 u! ^3 C# C/ r- ] if(osvi->dwMajorVersion==4L&&osvi->dwMinorVersion==10L)ShellType=Windows98;
! x! _& n3 d9 I" { else if(osvi->dwMajorVersion==4L&&osvi->dwMinorVersion==90L)ShellType=WindowsME;
1 |9 `: z8 g; {) A' S free(osvi);2 W- o' x% u0 j' `. E+ X! M
}
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return ShellType;
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. E& g* `# s5 @, J5 Z//------------------------------------------------------------------------------------------------8 x8 I" l/ U+ f" `9 K& r& B8 h
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% p: T9 E* N1 h# G- y9 T/ K12. 如何在指定矩形框内水平/垂直显示多行文字
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! H4 i6 c- a$ V* o9 v6 F$ I+ [///////////////////////////////////////////////////////9 w! n# P# Q# i: |
//说明:% e* Z5 p( M! I8 x9 |
// 在矩形框中水平或垂直显示多行文字,jingzhou xu.
4 k8 Q. `+ J. V( o/ F K// lMode: 排列方式,0:水平方式; 1:垂直对齐
$ I$ Z: x5 O5 r8 _( ^9 i! M// lHori: 水平对齐方式, 0:左对齐; 1:居中; 2:右对齐; 3:自定义
& a _6 G2 O2 W) x/ s) z// lVert: 垂直对齐方式, 0:顶对齐; 1:居中; 2:底对齐; 3:自定义/ P; r \* N2 J' U3 X. U2 J
///////////////////////////////////////////////////////
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CRect DrawTitleInRect(CDC *pDC, CString szString, LPRECT lpRect, long lMode, long lHori, long lVert)3 A" [) I' S$ i' N8 R
{
' E9 K6 j0 C8 N1 Q' m6 A TEXTMETRIC tm;
0 h/ x4 R0 f) N$ M pDC->GetTextMetrics(&tm);; |: n6 y# O3 Y8 ]1 |8 k
int tmpWidth=tm.tmAveCharWidth, tmpHeight=tm.tmHeight;& j: {* P1 u, y8 R- r! ^
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CRect rcInner(lpRect);6 n; ~* v7 w9 @' ?% A+ ~
if(lMode==0)
/ F6 E z; z1 u8 a {
7 r! K) ^+ t0 s0 m/ D4 D( O rcInner.left+=tmpWidth;
: f6 |, F2 k( T; ~* Q rcInner.right-=tmpWidth;0 X* N, q% Z* q. `$ |$ X
rcInner.top-=tmpWidth;2 y* `9 W6 S0 \7 a
rcInner.bottom+=tmpWidth; i* O V7 \$ U) A1 c# r h! _
}2 b8 C6 m( W# q
if(lMode==1)5 x7 y. C, ]; S& G! T2 U
{
5 ]6 P5 Z( p, a7 U rcInner.left+=tmpWidth;9 ?* w2 b5 y0 d# y4 M1 k+ u
rcInner.right=rcInner.left+tmpWidth;. H6 _7 Q& k3 |" Q
rcInner.top-=tmpWidth;3 R# o/ E/ c& l+ p1 i
rcInner.bottom+=tmpWidth;$ i% W, `( @: u1 b m' K' N
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( R2 B4 {7 }5 w- S pDC->DrawText(szString, rcInner,DT_CALCRECT);
% A5 I2 X0 q9 m5 X: U switch(lHori)0 _8 p+ Y+ v8 r @3 V9 @
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case 0:
! c& O9 Y L, O7 w/ a break;* z' d6 u; |5 F$ o$ N4 r
case 1:6 c8 N2 d/ M! `
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long xOutCent=(lpRect->right+lpRect->left)/2;4 K+ d. T8 N! [' _) r/ k
long xInnCent=(rcInner.right+rcInner.left)/2;# H. J0 _ e9 a. C
rcInner.left+=(xOutCent-xInnCent);" @( x5 Z1 l! L3 m5 {
rcInner.right+=(xOutCent-xInnCent);+ W9 e, w: r8 p! C
}( |) p" K( q2 T
break;
7 V5 h; Z, i* }; \& o$ a case 2:$ @/ m( _' ^9 E. L+ M
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long lInWidth=rcInner.right-rcInner.left;4 p; a. V; W. q7 R( J
rcInner.right=lpRect->right-tmpWidth;
( t |6 h# s% N2 G! \ rcInner.left=rcInner.right-lInWidth;
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7 Y& Z$ v' x) Q9 d4 ] break;/ |, C8 ~( s2 f2 g* `) Y5 s
default:9 I3 k9 k3 b2 }0 |0 C, _
break;, ^3 u6 M4 V! }: v: y0 @9 T
}
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switch(lVert)
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k [( O9 L& H- B. c2 W case 0:
1 p- Q9 V5 O6 O0 |( B/ z+ n5 J, T6 D break;) [) a; T1 Y" C
case 1:" e5 ]4 ~% ^& P: R d
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long yOutCent=(lpRect->bottom+lpRect->top)/2;- E* B' L# |4 A) d; i
long yInnCent=(rcInner.bottom+rcInner.top)/2;. R, U/ E- t9 |
rcInner.top-=(yInnCent-yOutCent);; P1 m- ^$ K; m, c' |( Y7 d" W2 S
rcInner.bottom-=(yInnCent-yOutCent);
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break;
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{
: ?# J. c/ t# g long lInHeigh=rcInner.top-rcInner.bottom;
3 v9 p' E8 Z+ b, g! ^6 N. u& a rcInner.bottom=lpRect->bottom+tmpWidth;
6 I) ^5 S: _$ F: t4 Z rcInner.top=rcInner.bottom+lInHeigh;
5 _+ Y1 W. i& C) F. P5 ?* P }/ z0 \! f8 B% D- F
break;/ X# y) n* H/ Z7 n
default:$ M, n0 O' x1 T
break;- _8 E4 q3 s4 c
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, T. I0 t" a) Y4 y& J //---------------------------------------------------------------------------------------------
0 w" ~% O* s; S; _& H, [ //功能:根据新、老矩形,重新计算行数,使文字多行显示,jingzhou xu
2 n) l. ?& u1 v" o; I3 H //---------------------------------------------------------------------------------------------" C6 T6 a# ~: |# ~. W1 ~7 W* q5 a
//一行中最大字符数
) }! q1 j0 I8 Z w m5 a int nMaxLineChar = abs(lpRect->right - lpRect->left) / tmpWidth ; 3 e; X7 J) b' X# @& C
//记录当前行的宽度
. ~; R' U1 U- k1 ~ short theLineLength=0; ) V$ k% J+ r5 t
//记录当前行中汉字字节数,以防止将一半汉字分为两行8 W& \1 R- r. o3 |
unsigned short halfChinese=0;
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for(int i=0; i<=szString.GetLength()-1; i++)
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if(((unsigned char)szString.GetAt(i) == 0x0d) && ((unsigned char)szString.GetAt(i+1) == 0x0a))
6 u H) c6 {4 b q/ x" T7 ^ theLineLength=0;
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//大于0xa1的字节为汉字字节
+ k" ?" Q: J6 W$ q/ p! @1 | if((unsigned char)szString.GetAt(i) >= 0xA1)
1 q3 ~* Y$ n# \% A! P halfChinese++;
; [. ]9 X: K1 h theLineLength++;
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//如果行宽大于每行最大宽度,进行特殊处理; I$ S% F# K5 x+ z; m: M7 ^; t
if(theLineLength > nMaxLineChar)1 a0 O; v" Y; V3 T, O; ?
{
0 g# N. H `5 N5 @ //防止将一个汉字分为两行,回溯+ y7 i; `2 l" y- Y/ x$ J+ j
if(halfChinese%2)( V% d, P4 v6 y$ ]" l
{; y9 q& ?4 x5 o- |. J# g
szString.Insert(i,(unsigned char)0x0a);. D& e5 h4 Z' J+ Q. o, A
szString.Insert(i,(unsigned char)0x0d);
6 \# N2 i( \0 b9 t }
8 C6 G2 E: F& x* ]+ W7 g7 W5 | else
# p( y7 M8 D$ P% b# j {
: G# O8 I0 K' t7 r6 R; ` szString.Insert(i-1,(unsigned char)0x0a);
7 T+ g b3 X- I1 |1 O1 M1 R szString.Insert(i-1,(unsigned char)0x0d);; m1 p: F) y5 j: {: r# U
}! X+ u4 l+ r u% `
- \9 C6 t( ^+ w2 t1 X# v theLineLength = 0;$ ] g1 `3 z$ H: J
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& a7 }+ `" T, n //重新计算矩形边界范围
$ H* h5 L; P8 c; B& k, o" O7 |. M' l& b// int tmpLine = int(abs(szString.GetLength()*tmpWidth / abs(lpRect->right - lpRect->left)-0.5));
2 ^& }7 T/ n, j$ \& e- C0 A: R- s
$ O$ {% \1 X5 ~7 ?// tmpLine += (szString.GetLength()*tmpWidth % abs(lpRect->right - lpRect->left))? 1 : 0;
0 v( ?- |. X' r) k// if(tmpLine == 0)
: C4 z( v3 {5 Y5 J& H// tmpLine = 1;
0 I% S. m' y9 W7 ~; L. \7 o9 ~
6 O" b! |( L( z7 z1 ^ if(rcInner.bottom > lpRect->bottom)
+ Q% n# N3 x' f1 T# O rcInner.bottom = lpRect->bottom;
1 z6 o$ x2 Y, N- n' m# L3 w if(rcInner.top < lpRect->top)
/ d0 V% X: y: A$ T$ z rcInner.top = lpRect->top;7 X2 L3 z1 ]/ \
2 t8 ?* Q! X2 e //---------------------------------------------------------------------------------------------; K0 j1 W$ s+ u1 K% B
! ?5 I2 k& p, L4 U! `0 {+ r" k if(lHori==0)
9 w6 P( D0 G) c4 E% x' ]1 X# x pDC->DrawText(szString, rcInner, DT_WORDBREAK|DT_LEFT);
, o! ?: S& X. p else if(lHori==1)4 e' y7 M/ i& x+ ~
pDC->DrawText(szString, rcInner, DT_WORDBREAK|DT_CENTER);& m% |* U. {& \
else if(lHori==2)' r7 i2 ]- f' d* |+ {$ Y! s
pDC->DrawText(szString, rcInner, DT_WORDBREAK|DT_RIGHT);
; p) @8 B1 c" y$ X* X( d return rcInner;9 |+ O! L3 ~" z, s6 A
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" L6 J M5 j9 E& C; H13. 如何在指定矩形中旋转显示文字
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///////////////////////////////////////////////////////
, K/ L4 s; {" ^! g2 ]3 S& N//说明:2 S- @1 V( X W0 b. r
// 在矩形框中旋转方式显示文字,jingzhou xu2 d! g( ?7 i- h6 W$ `" K) }* y
//参数: ; P s9 d$ d1 K9 @, H
// pDC: DC指针5 h0 k5 @3 |- Y4 `6 }' r I) s: P
// str: 显示文字
, H9 o9 l7 t: ^7 r5 P; E5 @' k// rect: 显示范围
# D9 G1 E- C7 [+ h: b8 z. D& {8 M// angle: 旋转角度
( K0 W( a) v: c6 B$ b. O// nOptions: ExtTextOut()中相应设置2 S/ N6 y z: L% R1 \) U
///////////////////////////////////////////////////////+ q0 v0 K2 j/ d! @8 D' A0 O
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void DrawRotatedText(CDC* pDC, const CString str, CRect rect, 8 _) e; U6 W$ z8 G0 B; U* b: g
double angle, UINT nOptions)
# h. i1 h h- D" A. O{# e+ W! @4 b0 Y3 x& h) R6 l
//按比例转换角度值
- p7 K7 S l4 Z1 K5 R2 G! X double pi = 3.141592654;
" ?% t( E2 G) X, \5 T double radian = pi * 2 / 360 * angle;* M9 ~9 @: s9 ?) H9 s
3 J# q" R9 v; Z8 W //获取显示文字中心点& z- w9 ?# i1 l/ N) S% o; M
CSize TextSize = pDC->GetTextExtent(str);$ p K/ `- A8 H
CPoint center;
0 u. V. p7 c) w' N& O, t center.x = TextSize.cx / 2;5 B6 Q7 Q6 R+ F
center.y = TextSize.cy / 2;
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//计算显示文字新的中心点/ I p, e6 J8 o* ^. l
CPoint rcenter;
) F# j. u4 X4 z/ b1 q/ L: B9 I rcenter.x = long(cos(radian) * center.x - sin(radian) * center.y);# h2 Q3 E+ A1 k# X: a% }
rcenter.y = long(sin(radian) * center.x + cos(radian) * center.y);+ r! ]8 V, z5 l
" g0 |0 @( j9 V //绘制文字
! f& v# K3 ~$ w8 X+ P( H pDC->SetTextAlign(TA_BASELINE);. c* K8 T' n0 v/ b
pDC->SetBkMode(TRANSPARENT);
. m# A! J8 g$ S P4 O! p1 c pDC->ExtTextOut(rect.left + rect.Width() / 2 - rcenter.x, ! }) Y! I7 H3 G4 ~4 P5 p
rect.top + rect.Height() / 2 + rcenter.y,: ]& G8 Z& O& T2 h3 A& @
nOptions, rect, str, NULL);
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: `8 z% o5 y4 A4 y
14. 如何将32 x 32像素图标转换为16 x 16像素值的图标
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* [3 | H* C/ l$ EHICON Convert32x32IconTo16x16(HICON h32x32Icon)# E; G# \# S0 x7 a
{
5 I b; K6 t) W$ _* n HDC hMainDC, hMemDC1, hMemDC2;- J: ~. U& d1 j
HICON h16x16Icon;
7 w, y7 K" o) z3 ~/ O6 F9 A BITMAP bmp;
: V6 D% J& i t- q7 H0 @/ U HBITMAP hOldBmp1, hOldBmp2;
$ P7 u/ y' E. {2 q# `% ~4 C0 N ICONINFO IconInfo32x32, IconInfo16x16;8 z, l+ p5 U$ J3 R( H9 n- _
' Z) @' o1 Q, I$ X
GetIconInfo(h32x32Icon, &IconInfo32x32);
4 r( ?1 Y5 o$ @6 w6 Z6 z8 D2 M
! [1 t1 e5 L8 S$ B8 F; Z hMainDC = ::GetDC(m_hWnd);
5 h6 t5 I+ [* m/ X; G6 Q3 W- K hMemDC1 = CreateCompatibleDC(hMainDC);
3 y/ h! K! k$ T. o) V( I hMemDC2 = CreateCompatibleDC(hMainDC);
0 k* D9 f6 m6 m% |: ^7 h
6 j' c. p, s1 o GetObject(IconInfo32x32.hbmColor, sizeof(BITMAP), &bmp);3 l0 A M4 S+ i9 w
6 w& C$ x! V8 a6 X. w0 i4 T* z
IconInfo16x16.hbmColor = CreateBitmap( 16, 16, ) Z) w3 @" i; Q. Q
bmp.bmPlanes,
0 C: {3 p: S$ F/ C. l6 X: Z bmp.bmBitsPixel,
* p! D; o* R2 H% u3 i5 ? NULL);
- W/ g5 M& P; l& A. s p* u8 r! W4 P: R5 R7 I2 h
hOldBmp1 = (HBITMAP) SelectObject( hMemDC1, . j: k) |" Y; y% X2 U, r7 C
IconInfo32x32.hbmColor);
# s3 o! ?. Y7 C& }. s hOldBmp2 = (HBITMAP) SelectObject( hMemDC2,
/ H6 w( `, z" u% d& y3 F7 r1 C3 Q* O IconInfo16x16.hbmColor);
8 K% G3 y7 g6 @% \' I/ m2 a- N5 z+ r2 K1 k
StretchBlt(hMemDC2,6 S0 D6 w7 f1 b. Q
0, 0,
* [, s3 @# T4 Y- F 16, 16,
# m3 U/ \* k5 T- N$ Z, \4 o9 { hMemDC1,
) W6 S" Y+ W4 g/ T0 J0 V; R 0, 0,2 D* l: Q) K, h" K6 `! Q3 T
32, 32,
! w- Q) c- M% o4 `" l SRCCOPY
+ k$ Q, }' t& O( t W: y );# W+ [0 L% L; S z
, J$ }; V6 k$ `7 h" c GetObject(IconInfo32x32.hbmMask, sizeof(BITMAP), &bmp);
; v( A( X% f9 L# h. d+ e6 s
0 d Q. o: N% H o0 o( c IconInfo16x16.hbmMask = CreateBitmap( 16, 16,
" | |3 F4 h+ B! Z c( | bmp.bmPlanes,
3 a4 B* u2 ^ \4 O bmp.bmBitsPixel,/ I9 M$ Q* p; @9 `2 C+ S
NULL);
3 k2 v0 j8 ~- Q) `+ C; b ]0 d0 ?, A: ^
SelectObject(hMemDC1, IconInfo32x32.hbmMask);3 {" g" [* o7 z$ y! V
SelectObject(hMemDC2, IconInfo16x16.hbmMask);6 }- E5 Y) p, G0 h2 F" j* L
6 p0 v) w- x- {8 S% _6 ?9 }% k StretchBlt(hMemDC2,
9 K8 j& M0 E6 _2 f6 \9 ? 0, 0,
, N. @! {% W! I7 g4 R2 L* e 16, 16,
* k) e) i4 X+ }( h. n hMemDC1,- o. A7 ?( Y" H, \3 E/ \
0, 0,
6 O* Q: }! `7 s8 |& n$ i 32, 32,
& m) u5 Q* Q, C6 \) Z3 T SRCCOPY! ~" t h) E' n" @
);; ^5 o8 m5 ~9 j5 A& j, C+ S
* k V6 N6 ?# _* S! U! [+ k
SelectObject(hMemDC1, hOldBmp1);
7 p+ w4 S3 ?: G/ H8 o9 x0 ?& l SelectObject(hMemDC2, hOldBmp2);+ `$ k% G* T9 {
7 W( ~) I/ j; i# {
IconInfo16x16.fIcon = TRUE;
' H" \+ O$ C5 N7 i( P3 U; m h16x16Icon = CreateIconIndirect(&IconInfo16x16);
% P4 t3 w' h: n( } S) J DeleteObject(IconInfo32x32.hbmColor);
& ?, t; O; a- `% o# m DeleteObject(IconInfo16x16.hbmColor);
1 l2 E- q! V& M/ p/ S9 c7 Y DeleteObject(IconInfo32x32.hbmMask);# B4 d8 \3 l+ @% J6 a. ` D
DeleteObject(IconInfo16x16.hbmMask);
: z) I$ J, Y& w) L1 K) @+ }5 } DeleteDC(hMemDC1);
9 |5 z3 `* [% ^* ]5 P DeleteDC(hMemDC2);5 _/ d" ^/ j. ^$ n- P" y
" z0 N. s7 j5 Z" v2 k' O2 z
::ReleaseDC(m_hWnd, hMainDC);/ K' d' T' l4 u/ U8 Z
return h16x16Icon;( L9 ^" q, ?' o/ l
}; `7 f, J, P) Q
R( s+ C# |; l- y, A4 C9 R
2 h7 j. y v% ~1 ^15. 如何建立一个灰度级图标5 Q: Y. @9 i( N
+ x E/ m3 O1 w ^9 p$ H
HICON CreateGrayscaleIcon(HICON hIcon)8 R4 x9 j3 o. D& S( @$ f' A
{
1 ^# ?; t! M% a# ?# C HICON hGrayIcon = NULL;" ?0 b0 M2 f( g' H X8 F
HDC hMainDC = NULL, + x& n# Y/ e& `% {0 K
hMemDC1 = NULL,
3 p$ V. T1 }9 b2 A& |: x8 e5 u hMemDC2 = NULL;7 L4 x9 r; Y+ G; H
BITMAP bmp;7 M2 T6 D2 S. h" w% Q
HBITMAP hOldBmp1 = NULL,* \3 R+ u. h6 o
hOldBmp2 = NULL;* |$ H$ H& P3 E j
ICONINFO csII, csGrayII;# K2 y2 V- g) D' M8 C- F7 {7 Z
BOOL bRetValue = FALSE;
& [* V9 U2 Y7 C0 F j3 a" r
9 b l/ G6 H$ z* G bRetValue = ::GetIconInfo(hIcon, &csII);
6 h) i n+ E* o1 V
! w, g* V$ |1 O3 A, G7 R* x if (bRetValue == FALSE) return NULL;
; H8 h1 H/ h+ [5 W N$ j u
* I; v" w" N2 b* |% Q( B: ^ hMainDC = ::GetDC(m_hWnd);
; |) m7 I0 A2 X6 o- S hMemDC1 = ::CreateCompatibleDC(hMainDC);; V" D5 F) Y8 C4 U! k
hMemDC2 = ::CreateCompatibleDC(hMainDC);; m" h' y' j8 |4 ^+ Z4 M
if (hMainDC == NULL ||
: _* i! q9 j. _; _ hMemDC1 == NULL ||" N5 ^5 p% ?) U
hMemDC2 == NULL) 2 Z. v5 m0 p! P8 l/ w- x# L
return NULL;
, k7 e, h& r$ z' b Z K$ |( L' p# a, R6 }9 |2 E; g! w
if (::GetObject(csII.hbmColor,
- K, R4 k0 d/ ?. j3 t7 K1 V sizeof(BITMAP), &
- l+ `7 Q7 [! D) e4 Q7 ^9 Y J amp;bmp))8 v: X, f. [ U7 P5 k
{
9 ?9 W2 e9 y( O% s, a# ~* C. {' }- q csGrayII.hbmColor =
5 V( `9 A! v8 x ::CreateBitmap(csII.xHotspot*2,
4 n" |9 u" g' v# R! p/ C% k6 ? C& k/ A9 x csII.yHotspot*2, ; T8 c9 z F& ]* e, ?
bmp.bmPlanes, ! ]+ J3 a3 g; m) l& n* f: e. H
bmp.bmBitsPixel, ' f6 O% D0 S* ^3 U
NULL);
w) V7 _8 R: b" b) c# ] if (csGrayII.hbmColor)
. _& {% Q! s4 d6 q4 m6 L) ~8 j7 _8 H/ v {
9 X! |) {; q4 ^& S hOldBmp1 =
3 }4 p- `$ x; y. { (HBITMAP)::SelectObject(hMemDC1,$ B6 W& V1 l% V# J$ e* X" p
csII.hbmColor);1 ?9 n& P% s9 S+ E
hOldBmp2 =
; R' ]* k& C3 n4 v: f: u" @! ] T (HBITMAP)::SelectObject(hMemDC2,: d5 Y' v' z) ^5 }4 P
csGrayII.hbmColor);
" G; G* T% i- q/ V
( v1 H4 d# R. K0 k( L" N. O ::BitBlt(hMemDC2, 0, 0, csII.xHotspot*2,
. o3 n" {' C. O* }. J6 a7 H csII.yHotspot*2, hMemDC1, 0, 0,/ {; f) { Y' ?9 O% ?& w
SRCCOPY);, I8 V4 d) u5 \1 `# X0 H0 z
1 D) ?" `4 D. \/ }5 |
DWORD dwLoopY = 0, dwLoopX = 0;* V' D" n' ~( A
COLORREF crPixel = 0;
& d9 \& n+ N; i# [6 t! P( E5 p BYTE byNewPixel = 0;
) \- [. F9 p* K; d for (dwLoopY = 0; dwLoopY < csII.yHotspot*2; dwLoopY++)
6 v2 B7 I/ |; D% m8 Y {$ a, B" \) V( E3 B$ h$ O- ] `
for (dwLoopX = 0; dwLoopX < csII.xHotspot*2; dwLoopX++)
+ s9 U8 W7 g! X8 X; ~/ Q6 a4 b* h {
9 J) C4 C1 w/ y) r3 u% B$ q) ] crPixel = ::GetPixel(hMemDC2, dwLoopX, dwLoopY);9 `+ H. T1 H0 [0 F. T
byNewPixel = (BYTE)((GetRValue(crPixel) * 0.299) +
" F4 M: i+ r# j/ E9 F& i( ~% B (GetGValue(crPixel) * 0.587) +
) X3 [0 K {7 y, Q3 I, O (GetBValue(crPixel) * 0.114));
) j" ?+ u1 V/ J$ l if (crPixel) ::SetPixel(hMemDC2,1 D% c/ w9 H' j7 A4 Y3 X% C
dwLoopX,9 r J' ^ Y2 y$ P+ \1 f
dwLoopY,4 r+ W" l3 u! F9 A8 E
RGB(byNewPixel,4 |. p5 j- C( q! ^; {6 b
byNewPixel,
. N! D& L2 Z! z9 I. Z" U byNewPixel));
( n6 {& ]- v. o0 q3 p } // for
; G$ ]+ F) I6 n1 ]: W } // for' ^5 q; c7 v! Y- w7 o. a
::SelectObject(hMemDC1, hOldBmp1);) _5 q5 T7 m; n8 P
::SelectObject(hMemDC2, hOldBmp2);, F/ v$ O E2 E) ~2 w
& E( ~) v; y' M0 s" j% X* c0 \, T
csGrayII.hbmMask = csII.hbmMask; u7 x5 N3 f( J5 F4 f& D7 n
csGrayII.fIcon = TRUE;
1 i& `) B: C# t, X hGrayIcon = ::CreateIconIndirect(&csGrayII);" ^0 a* c0 T; S3 P! r
} // if0 P( s! B# _1 _. y
: eleteObject(csGrayII.hbmColor);/ K8 Q( i, D0 ?2 ?% V: @
//: eleteObject(csGrayII.hbmMask);" h( k% k) F7 q
} // if6 E7 x0 v9 W+ @0 a/ w) N
: eleteObject(csII.hbmColor);! i/ |% `! o( W) M+ h
::DeleteObject(csII.hbmMask);6 t4 ^9 A4 k6 C0 d4 M a5 b% C, g
::DeleteDC(hMemDC1);
, l' ?6 w* N' W9 `& p# M ::DeleteDC(hMemDC2);
$ v) O4 M) w- g: Y' Y0 E5 u" _ ::ReleaseDC(m_hWnd, hMainDC);9 u1 X7 E9 C5 [/ J: k8 L' P, @. P
# n9 {1 C) U+ C return hGrayIcon;8 v. r; q- k0 r2 a
}, A5 |' f8 I( C) Q
2 z; v! w0 I. E+ M9 p1 Z
1 T g2 ]' q6 ?16. 如何按指定角度旋转显示内存位图(用法和BitBlt类似)( u( _. }: p( ?8 D4 e( y
+ [' N: m7 ?6 e& Ovoid RotBlt(HDC destDC, int srcx1, int srcy1, int srcx2, int srcy2,) b' e8 u6 |5 a1 K& S( N
~- e& R1 g9 B+ ^
HDC srcDC , int destx1, int desty1 ,int thetaInDegrees ,DWORD mode)6 ^* i$ _. ]& x2 F. }' z
{
. ?" F+ Q9 s/ i& D0 R, T, d double theta = thetaInDegrees * (3.14159/180);
, f+ g/ s5 s6 E4 Z# v$ N0 R2 h; G: `! i3 O
//原图像原始大小, f& P4 c/ O' s% A+ F# ]0 N" [
% L) _! p( b, W: t int width = srcx2 - srcx1;
" \# {) |& x9 M/ h0 n, L' U int height = srcy2 - srcy1; q! X0 p3 m3 ?
$ r6 d% A g( \) O, u# R
! h6 h7 c/ M9 J2 S# q7 `* S
//原图像中心点
) N+ |: E( i! c' |) H6 r int centreX = int(float(srcx2 + srcx1)/2);9 f3 U3 Y2 V7 X# `: N: P
int centreY = int(float(srcy2 + srcy1)/2);6 d) y' W9 z. `$ i+ \
; p" y, ?7 f2 S# _; n //判断出图像可以沿任意方向旋转的矩形框
# m. M! O0 d& l, u5 Q! u if(width>height)height = width;8 O; S, _ {. h
else
; D8 g" h% T1 `) j+ G6 P width = height;
' H# a1 w O. ?0 f% t; n3 _$ J3 {3 P1 a) _( A; i. w' i
HDC memDC = CreateCompatibleDC(destDC);
; _4 D) e" d/ M3 e" g HBITMAP memBmp = CreateCompatibleBitmap(destDC, width, height);+ h' ?) P& I3 c x5 Y) M
* k& W X8 T5 }' ?! k+ s$ } HBITMAP obmp = (HBITMAP) SelectObject(memDC, memBmp);' m4 d" l: i4 @
I: n! c! k1 ?3 K6 ?
8 p( t' M+ H7 p0 u4 D1 \ //内存DC新在中心点0 L3 c' `) m6 T J( @. H
6 ?3 n# s3 p) U Q) w int newCentre = int(float(width)/2);
. t& A6 F0 K1 E7 A/ c- E //开始旋转
1 h+ M# ?% J2 I( i* E1 Y for(int x = srcx1; x<=srcx2; x++)) W- y2 o# g; s [% S: A: O
for(int y = srcy1; y<=srcy2; y++)3 h$ Y/ `! ?' H: V$ T$ m( p
{
, a; b, G" O! Q4 Q COLORREF col = GetPixel(srcDC,x,y);
4 w- z3 d% q, U: X int newX = int((x-centreX)*sin(theta)+(y-centreY)*cos(theta));
0 m- o5 n. t6 C int newY = int((x-centreX)*cos(theta)-(y-centreY)*sin(theta));
4 A: L4 \& f9 E$ j$ i! R SetPixel(memDC , newX + newCentre, newY + newCentre, col);
9 z/ Q. c) @2 e; O }5 S2 E4 G1 i3 Q+ }0 z" a
0 Q' x* J+ e6 x" F0 I
//复制到目标DC上
3 Z( T3 n8 v- g8 ^) ]: k% q3 c+ f BitBlt(destDC, destx1, desty1, width, height, memDC, 0,0,mode);
" w0 Y' t; y7 d8 }$ u //释放内存
! X; [0 e' m) F* Q1 l SelectObject(memDC, obmp);
: Q9 a0 C# P% o DeleteDC(memDC);! X- W) l: o) |& F& ?" n1 X
DeleteObject(memBmp);/ A! ^1 v6 c# A/ _+ J
}
5 X. D6 D# Z( c# T" n9 t) D5 [; h+ X
4 c) K: E+ M9 U7 T. u( G
3 W% q4 P. q' g5 {6 x用法:: ^1 `7 v) i& n1 B$ {
6 d% E/ a g* f& X
RotBlt(dc, 0,0,150,150,memDC,200,0, 45, SRCCOPY);! w7 q+ b4 \( ^. S0 f# _* W, R
' p2 C! A% e$ a5 T
0 { q4 R$ Q) D
17. 如何将指定的窗体,以位图形式复制到系统剪切板上
6 Q* B- o2 Z2 m* d4 S5 P" J; ~9 F' t0 x7 [7 [
void CScreenSnapDlg::toClipboard_Bio(CWnd * wnd, BOOL FullWnd)
0 C9 ]1 C% | l0 e! B# Z9 c" Q2 s& K{6 ^2 o. g T, C r
CDC *dc;
/ C% C m- A& G if(FullWnd)) A+ T: V, m/ N5 v( q
{ /* 抓取整个窗口 */* n2 o" h' ~7 q4 P9 c9 K6 f7 m+ W
dc = new CWindowDC(wnd);& {; X; i5 V2 c7 G6 {8 n8 F- T, ^; W
} /* 抓取整个窗口 */( O9 {/ G& N2 A) y6 x+ m1 t
else5 S: o) U) ]* K% R3 O3 }2 F; n: O
{ /* 仅抓取客户区时 */
0 E; p3 b$ T0 q# G4 N dc = new CClientDC(wnd);6 x8 } c& f5 v g( |) p# ]
} /* 仅抓取客户区时 */* u7 V6 Q# O! B$ k8 f2 V+ t
/ Q6 ^! T4 h1 R5 N# Z: n CDC memDC;' m* h: N% G, H- K7 h
memDC.CreateCompatibleDC(dc);
% t K% n. L9 G4 E- x) I4 d# G) y% ~- }. L. |) ?2 ^
CBitmap bm;
9 g7 o* ~1 {2 u; W4 I CRect r;
6 L. v# D; P0 c: K. Q: L7 S if(FullWnd)5 e- x; ]' A5 ?8 f* ~* R) b( d
wnd->GetWindowRect(&r);* p3 \4 L# m. \0 h! J# P
else1 X7 j; F6 Z- f( y, F: `# G" u
wnd->GetClientRect(&r);
- s7 H) C, d9 N# ]! K+ n1 b% h
' ^4 b) d+ b' ~! W8 y* q, U CString s;
9 v5 d4 E, z5 ^) D wnd->GetWindowText(s);
! A# b' [; S& S) @ CSize sz(r.Width(), r.Height());
) ^ m; }/ d9 a6 d% u1 P9 X# ^) k; f2 `. r8 `6 \
bm.CreateCompatibleBitmap(dc, sz.cx, sz.cy);
* ]! f; p- N+ N6 @3 s5 E: }+ X CBitmap * oldbm = memDC.SelectObject(&bm);
6 V1 v$ [" a. K& u memDC.BitBlt(0, 0, sz.cx, sz.cy, dc, 0, 0, SRCCOPY);
8 {9 S% J# y$ ~4 l+ i/ |& T @* ~; \" J
//直接调用OpenClipboard(),而不用wnd->GetParent()->OpenClipboard();& T- e1 c( A. ]
wnd->OpenClipboard();6 `" V6 L4 B8 ?1 ]# K0 U
::EmptyClipboard();- a( u' C: e3 O Y% f
::SetClipboardData(CF_BITMAP, bm.m_hObject);
1 K3 Z/ ]8 ^# G3 {# D CloseClipboard();" c+ D* Q& [* w- M* E
0 L; R+ n5 m: ?- \* B8 G8 s7 n; P //恢复原始环境- ~. o- Y2 `$ j9 b
memDC.SelectObject(oldbm);
1 P6 W( ^/ u, a' j4 J; F bm.Detach(); v" s% ~9 B! ^7 E2 P4 ?% G- t
delete dc;
! r+ u' |; v: U6 I& e+ Y' [ `4 c4 f}
& L$ ]" T, ]$ m1 d$ Z0 Q3 i: d# U" }/ ^/ R3 Q
' S. ^0 F2 u& O) Q. e18. 如何替换HBITMAP中的颜色值5 X8 b+ S- F+ m w+ [
6 T1 g- J, T8 y$ [#define COLORREF2RGB(Color) (Color & 0xff00) | ((Color >> 16) & 0xff) \# J$ Q0 f9 B( v
| ((Color << 16) & 0xff0000)5 @2 }4 ^% ~4 r( g
2 A* G9 d* P5 A' H# T7 y8 g
HBITMAP ReplaceColor (HBITMAP hBmp,COLORREF cOldColor,COLORREF cNewColor)
3 [+ i* c) b# D$ q{9 S/ G; P, K _0 s# E1 Y( T& p h
HBITMAP RetBmp=NULL;
& l8 [, [ m* G if (hBmp)0 j' m9 v% J* K' O% z9 M* |' n
{ 2 ?6 a* S3 O: X x: v/ |7 ~ l& a
HDC BufferDC=CreateCompatibleDC(NULL); // 源位图DC/ F! c! |, P( Z: P) z- Z5 }
if (BufferDC)7 `2 L" Z9 a9 f( A8 z
{
2 U! Z- j: P" H. {. w1 Q9 E; q SelectObject(BufferDC,hBmp); // 选入DC中
; B! e+ K! p7 y9 |$ @ HDC DirectDC=CreateCompatibleDC(NULL); // 目标DC
/ z3 P+ m3 F& [! m if (DirectDC): v5 Z1 W7 y* [! X
{
' J0 S: J2 Z2 u3 f* J) A // 获取源位图大小
T1 Y* M8 q* l+ U t BITMAP bm;
" x! D! z4 a6 O# V, K( u6 l GetObject(hBmp, sizeof(bm), &bm);
4 R0 O7 a5 G" f; v7 w7 c. x: D1 W3 ~' C
# X+ D! M' O: p" H. J5 T2 F* Z // 初始化BITMAPINFO信息,以便使用CreateDIBSection2 ]( g7 ]6 q. U4 J: l
BITMAPINFO RGB32BitsBITMAPINFO; % P' }+ O" t- q0 W
ZeroMemory(&RGB32BitsBITMAPINFO,sizeof(BITMAPINFO));
' t1 ?/ i* N3 }; `9 r; x- y RGB32BitsBITMAPINFO.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);! g. w7 n% x! b8 N, u* x+ q
RGB32BitsBITMAPINFO.bmiHeader.biWidth=bm.bmWidth;, E; P1 j$ z; q/ Y+ j
RGB32BitsBITMAPINFO.bmiHeader.biHeight=bm.bmHeight;
! N2 Q. F- @ E; g+ q' K- g RGB32BitsBITMAPINFO.bmiHeader.biPlanes=1;5 A9 c/ n; A6 N$ D) _8 Z& h! z6 r3 l( h
RGB32BitsBITMAPINFO.bmiHeader.biBitCount=32;
* L k. _7 q0 T
0 k: P( U' e) s UINT * ptPixels; 7 m8 I: a* b* D5 x$ B
HBITMAP DirectBitmap= CreateDIBSection(DirectDC,
, M* \/ J3 c/ j/ a! p# P- A+ D (BITMAPINFO *)&RGB32BitsBITMAPINFO, 1 {$ q5 E$ `# h) w) V& @+ ~
DIB_RGB_COLORS,(void **)&ptPixels, NULL, 0);
8 n8 l% Z2 I; x( U, C4 o9 B, w if (DirectBitmap), r& ~! X4 r6 q8 `5 h% M+ k" _
{
' h5 [5 f( l9 L, S3 E6 g6 e HGDIOBJ PreviousObject=SelectObject(DirectDC, DirectBitmap);. W5 q) D" G* }- N, {3 J2 s+ A
BitBlt(DirectDC,0,0,bm.bmWidth,bm.bmHeight,BufferDC,0,0,SRCCOPY);
( v3 U( M( l8 G: ]- o& Q& n4 W
9 h1 U) k! w0 ~( c! \9 \& d5 \5 a // 转换 COLORREF 为 RGB5 T4 y' b& t/ u# I
cOldColor=COLORREF2RGB(cOldColor);1 v# n& v* ~! j
cNewColor=COLORREF2RGB(cNewColor);. v, \' x' o, C; w2 L N: G7 D
// 替换颜色( \# d' C1 U0 _; w8 ~
for (int i=((bm.bmWidth*bm.bmHeight)-1);i>=0;i--)2 U$ G. d5 V; g% |
{
' Z4 t- i& |2 _$ w; x if (ptPixels==cOldColor) ptPixels=cNewColor;6 P) i8 H# {1 e" S/ T. D4 }
}
1 b* u% G% f- w$ V& K0 B& B1 |) l
& R, `. Z- G0 I. Y0 ~ // 修改位图 DirectBitmap( g: E. D; Y5 H/ H. o
SelectObject(DirectDC,PreviousObject);& X6 A4 `7 |: r/ G; i
3 y- w G% ^# p2 s
// 完成
; D; p8 s! C' |. _ RetBmp=DirectBitmap;1 o& ?& j* |8 U v. W/ d
}
! ^. \' D! M4 t2 y2 { // 释放DC
x/ X6 [7 [- n' Z DeleteDC(DirectDC);! B& \" I( M$ U5 i4 S, x2 ]
}% ^& s( Q* n0 T1 i: T
// 释放DC' l* ?+ i! B, E3 j4 E5 `/ f- L5 ?
DeleteDC(BufferDC);! W( n( B9 J+ ]' o! i
}
( K, o* q" t+ E, o8 N | `) O1 V6 K# c }" \" a- ]3 _$ m+ F/ u' n
return RetBmp;3 C" b( J* p3 r; T% a' E7 L* U
}6 i, U2 R- `; v9 ?: {5 A9 K
5 s: |5 r& G! q9 X4 \' {( w- _! M* U; T4 D$ R$ k0 S
用法:2 M3 z, P3 a ]8 s5 \( g6 v/ @0 t8 b
, q# d1 ?$ _/ Z" iHBITMAP hBmp2 = LoadBitmap(g_hinstance,MAKEINTRESOURCE(IDB_SAMPLEBITMAP));% k, A+ [4 U, g
HBITMAP hBmp = ReplaceColor(hBmp2,0xff0000,0x00ff00); // 替换蓝色为绿色. H6 W5 m& v$ C& S5 `
......& i D" t0 Y, a7 @: _& R
" B2 e$ D# k, Z1 I2 R4 g& ZDeleteObject(hBmp2);
! h5 U7 ^. H6 D7 b( Z+ W* TDeleteObject(hBmp);
4 s7 H& t) E1 q* l( G1 A) a7 c7 ~3 F2 r" y
* H* d, b$ z9 Q/ l19. 如何转换并保存位图$ P2 N+ D, J9 a
* _8 i! _ w8 f# _: J3 b
//********************************************************************************
4 I9 f7 d4 Z! q: z5 g3 S//* 名称:DDBToDIB8 Z Q! G% S/ k3 H) ~* R8 Q
//* 作者:徐景周(jingzhou_xu@163.net)
5 m2 f$ E% P9 R Q1 A. s' t0 ~! |- j9 i//* 功能:设备相关转换为设备无关位图7 [' s' X$ Z/ e% H0 W$ F
//********************************************************************************& V! g0 }- u# ` r
' \; i' J- S* K; t6 L( |
HANDLE CScreenSnapDlg::DDBToDIB( CBitmap& bitmap, DWORD dwCompression /* = BI_RGB */) , t" g7 y) D& l# G8 b- e, w
{2 [* t. d) r; n( Q7 W: n
BITMAP bm;
1 f7 E6 C2 n, `$ e, U! C5 } BITMAPINFOHEADER bi;
; V2 B' D: I2 z LPBITMAPINFOHEADER lpbi;
8 F3 X% u2 X5 K) Z DWORD dwLen;
/ J5 o3 }6 L! i% @$ E2 k HANDLE hDIB;2 W" c f! c. W) Z
HANDLE handle;8 C9 q+ W V& N) S% A$ Q: y
HDC hDC;. B! q; P) d# z1 ^# M( L; Q
HPALETTE hPal;/ ]3 F( c+ u& G
( ~3 s6 r9 j/ R/ s0 ~' G/ ^, ?! F CWindowDC dc( this );
# U3 q6 t4 M$ b* m/ [ CPalette pal;( ]+ a, Q) x1 J/ |! \
//如果支持调色板的话,则建立它
6 l p3 I- l+ z9 g3 T: ]+ ?7 u if( dc.GetDeviceCaps( RASTERCAPS ) & RC_PALETTE )
- i/ ^* g2 q" l {
6 w V% s1 ]( A. L7 f UINT nSize = sizeof(LOGPALETTE) + ( sizeof(PALETTEENTRY) * 256 );
9 Y" g; M, y: u' o LOGPALETTE* pLP = (LOGPALETTE*)new BYTE[nSize];. ?3 R8 j* ^( \/ h3 b3 i1 V
pLP->palVersion = 0x300;9 y- Y' f& z) ~7 ? W, I% O( E& P/ y
pLP->palNumEntries = (unsigned short)GetSystemPaletteEntries( dc, 0, 255,
: ~' ~! B O6 l% G- c pLP->palPalEntry );
9 ?# K9 O! o/ L" s6 y. B! v
" l3 @0 c' J. z pal.CreatePalette( pLP );
2 b4 t' L3 }# G6 F0 z
0 A' b9 S( u8 ? //释放
3 q3 y G9 L' |; V+ [. ?0 v delete[] pLP;5 o4 d# u& y8 w t: [. @
}) i$ _& V1 N' L& J2 ^
3 G2 w* r8 r2 R
ASSERT( bitmap.GetSafeHandle() );
# G5 W6 M. d2 Q# N: D# ~: o. o6 ^# Y. d( ^9 k4 y* Y# h! A/ t/ F
3 u! }# O6 ?/ L% m //不支持BI_BITFIELDS类型
7 f$ _, K: q( ` F {% N if( dwCompression == BI_BITFIELDS )
* w# T7 c$ O* M+ c2 c7 t+ t1 Y6 p return NULL;5 b6 z$ q( C; r+ S. k3 @2 J5 S
* G; _& K; o( G //如果调色板为空,则用默认调色板
) [9 K% w1 p+ ]; q hPal = (HPALETTE) pal.GetSafeHandle();9 J7 }& Y# P+ ?) b
if (hPal==NULL)2 N! D8 P. T. q; E) M8 J
hPal = (HPALETTE) GetStockObject(DEFAULT_PALETTE);$ l8 C& V) L- [* P) l/ u4 G$ `2 k8 c5 v
! a0 ^' i, N- |* Y& W( Y5 w! w //获取位图信息 k; p, m- B: k5 H n3 l
bitmap.GetObject(sizeof(bm),(LPSTR)&bm);* n1 Q% H# l5 _0 V
3 B9 a( I5 I8 a( v7 A7 [ //初始化位图信息头$ Z1 j: a- e# W8 s+ x6 y; ]
bi.biSize = sizeof(BITMAPINFOHEADER);
1 v8 T" a) V+ e# ?$ \ bi.biWidth = bm.bmWidth;
* `$ _! }: V0 W; }8 q bi.biHeight = bm.bmHeight;
2 ] c4 ~$ ?$ a1 [) c; k8 |. C bi.biPlanes = 1;
6 y# Q% B/ `: ^8 P3 \7 A) F bi.biBitCount = (unsigned short)(bm.bmPlanes * bm.bmBitsPixel) ;3 x% @7 I0 S% X0 }+ }$ G
bi.biCompression = dwCompression;1 F5 ~# }4 [# X- Z2 J i$ t
bi.biSizeImage = 0;; ~- g4 r: W4 q8 P2 H- t1 w
bi.biXPelsPerMeter = 0;
+ R: H' F8 G# h6 U bi.biYPelsPerMeter = 0;2 P1 w! h" O) g
bi.biClrUsed = 0;
7 y2 v& K' q/ a* `) m- i bi.biClrImportant = 0;
) T y1 J8 h- @) g0 Y4 ]& |5 a% r. V. P& U* d5 H6 S3 O5 Q) d" _
//计算信息头及颜色表大小
' J% K o0 H! ? w8 c int nColors = 0;3 u- P* p3 H1 d7 U
if(bi.biBitCount <= 8)
7 P2 T7 D2 g/ x _ {) e) @9 B0 t* Y0 p1 g- W% X7 r
nColors = (1 << bi.biBitCount);6 Z4 V" ~3 R9 J, ^. g5 x2 ~0 V
}9 S! i3 x2 @! C7 D8 ^! ^! P
dwLen = bi.biSize + nColors * sizeof(RGBQUAD);
* I* `% ?4 J2 x2 @/ ~1 O& J. J+ q; y2 @6 f4 }" c% y5 I5 H' d1 \
hDC = ::GetDC(NULL);6 k# }) e. l9 O1 P6 [' g& {3 x
hPal = SelectPalette(hDC,hPal,FALSE);
3 s/ w$ K6 |0 Y, u { RealizePalette(hDC);1 L' c$ m: J# R( I
3 @( `6 R# `* n. y" j //为信息头及颜色表分配内存
( C6 k6 B- L# R9 s% U; K hDIB = GlobalAlloc(GMEM_FIXED,dwLen);
6 ~+ m# F/ h D6 p if (!hDIB){
% Z. F h* A8 h' Z$ r SelectPalette(hDC,hPal,FALSE);7 Q2 n, ?# ]) N9 v$ h
::ReleaseDC(NULL,hDC);
0 V# z3 B' l6 Q% D9 L8 K' W return NULL;
h0 K2 _& c& k1 w, z+ _( W }
9 u+ r. Q. M9 S* x! ?( M7 n% B. Z( Y; |8 [$ x
lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDIB);
7 G7 W$ W2 j/ |6 _. l9 j- C *lpbi = bi;
. Q1 Q6 ~( s3 i9 E+ U9 C0 R# J1 u% v- }, j; `4 y3 @
//调用 GetDIBits 计算图像大小& U( q1 l) `8 k" ~& _
GetDIBits(hDC, (HBITMAP)bitmap.GetSafeHandle(), 0L, (DWORD)bi.biHeight,
9 C8 C! U1 S! h+ j. @: n' V (LPBYTE)NULL, (LPBITMAPINFO)lpbi, (DWORD)DIB_RGB_COLORS);
$ ]! \9 b* v/ I- L0 W7 H0 I* J* U+ }- d) W- @
bi = *lpbi;
6 Z" ~5 w/ w$ h: L
! r; ~% o A7 Y- b% j! T" C, ^ //图像的每一行都对齐(32bit)边界
+ X, ]- b9 ~8 h. f, o if (bi.biSizeImage == 0){
1 a0 T( Z; n I8 W/ ?' R bi.biSizeImage = ((((bi.biWidth * bi.biBitCount) + 31) & ~31) / 8) " U: S2 C: u1 R& V, U, s" Z
* bi.biHeight;
F; p. a( z: A! }; v) P+ q if (dwCompression != BI_RGB)8 w; V4 n" ~( d$ r9 j8 u ]
bi.biSizeImage = (bi.biSizeImage * 3) / 2;
2 X4 h0 `, w! }+ n3 O }
" t" a# i+ r( m //重新分配内存大小,以便放下所有数据
8 q \7 f8 @4 h9 s$ h1 s dwLen += bi.biSizeImage;
# u W m* {& D V7 ~ handle = GlobalReAlloc(hDIB, dwLen, GMEM_MOVEABLE) ;' ~, d3 A% M) ?4 T( q1 k
if (handle != NULL)% j; N- Z3 n' c% y" R
hDIB = handle;
7 d# U3 }6 @) X3 X/ v3 } else
; ?) T: T( Q7 b5 s9 a {( D& [4 i* U4 ^% d8 l/ C
GlobalFree(hDIB);
h( A4 A5 [' v1 {+ ^
" W" c, i5 @) d& J* p //重选原始调色板
" a0 _$ ]4 y6 {5 X x& j+ ~ SelectPalette(hDC,hPal,FALSE);
- O: }- b, U" b' R* F, J) j ::ReleaseDC(NULL,hDC);* ^- h$ z( @" B* p. N: \; i
return NULL;
$ n4 M6 L5 d5 v* M: Q, r }
6 h: Z, G/ c3 Z: t; V8 p. l //获取位图数据
6 {, a* ?4 a! V9 ^# D! _- o; G) a lpbi = (LPBITMAPINFOHEADER)hDIB;" R6 P$ E6 K2 P
//最终获得的DIB
( _( ]) d; W7 D2 N) T BOOL bGotBits = GetDIBits( hDC, (HBITMAP)bitmap.GetSafeHandle(),+ T1 \5 i$ K* P6 K& t: g4 k& R7 ~
0L, //扫描行起始处
- {2 L) T/ `. {4 i (DWORD)bi.biHeight, //扫描行数! b' v/ K' ?# [. q7 c
(LPBYTE)lpbi //位图数据地址& e- n6 v+ U' z; N; M; k& e
+ (bi.biSize + nColors * sizeof(RGBQUAD)),; I/ ^+ V6 M1 X. Q
(LPBITMAPINFO)lpbi, //位图信息地址
( J" s! W0 o: q* o" z, k (DWORD)DIB_RGB_COLORS); //颜色板使用RGB* W* U* W7 F5 w
if( !bGotBits )
6 X {" K; @: H6 o1 Q {
2 b1 ~, I9 T$ m8 y; @ GlobalFree(hDIB);' H8 J& F& V; c' f8 q9 s) Q+ B# R2 `
SelectPalette(hDC,hPal,FALSE);2 ?- F1 l) F- U/ h& Y
::ReleaseDC(NULL,hDC);+ a, Q5 w/ m- B0 a/ k
return NULL;
: k6 }0 f: M2 z6 c }
Q$ Y) |$ `8 ?1 \0 Z- Z9 M5 C SelectPalette(hDC,hPal,FALSE);
9 b0 E3 [5 A0 r1 H8 p ::ReleaseDC(NULL,hDC);3 d$ F/ y% [8 R6 R
return hDIB;
( _# n* d; q5 K0 m4 R; e0 H}
' B( R U3 m& C
8 m6 r1 X9 v) ~( N! J& l6 N+ A# U: m4 Q& l8 ?
//********************************************************************************) q. N9 M S P( m1 o( ~
//* 名称:SaveBitmapToFile7 p9 w% W/ w$ I y
//* 修改:徐景周(jingzhou_xu@163.net)
5 H g) k1 x [" Q( }//* 功能:保存为位图文件
; L3 d' t! W# A7 B9 M//********************************************************************************1 \! D4 j- [4 r i+ H
BOOL CScreenSnapDlg::SaveBitmapToFile(HBITMAP hBitmap , CString lpFileName)
7 M! s) S, u! Q# ^" s; q{% [2 r" M; ~) ]& d1 J G
HDC hDC; //设备描述表
, B ]1 i0 y6 J) @# Y8 O int iBits; //当前显示分辨率下每个像素所占字节数
" X H: W3 z# G6 @ WORD wBitCount; //位图中每个像素所占字节数
7 i u8 H7 C. z# g: N DWORD dwPaletteSize=0, //定义调色板大小, 位图中像素字节大小 ,位图文件大小 , 写入文件字节数" ?8 K4 b: e2 u1 y6 \
dwBmBitsSize,
3 c; c9 n% t# D- C G- Z dwDIBSize, dwWritten;
9 X& n0 L" P. j# w! U j- g0 n BITMAP Bitmap;
0 v) |1 ]8 n* Q5 D q7 d9 j, G4 ]/ O BITMAPFILEHEADER bmfHdr; //位图属性结构 6 M# y3 R( I, z) ?& q" ^9 v3 V9 j
BITMAPINFOHEADER bi; //位图文件头结构 ; }; B! Q9 ?' X# K2 V0 _' I( P
LPBITMAPINFOHEADER lpbi; //位图信息头结构 . q4 g* @+ j; s9 o9 z& K
# ]4 x9 F8 [+ P, T8 O HANDLE fh, hDib, hPal,hOldPal=NULL; //指向位图信息头结构,定义文件,分配内存句柄,调色板句柄6 M L, J/ w, U1 m) p4 M: p- a/ x
2 ~# v" p! ?9 S+ F: c3 x4 Z. ]( ]
) i8 v) W* z# @% g- O4 q: X
//计算位图文件每个像素所占字节数1 u9 [/ L2 t# U0 D' i& W/ x+ ]
hDC = CreateDC("DISPLAY",NULL,NULL,NULL);
4 d3 k9 P( n- o& N iBits = GetDeviceCaps(hDC, BITSPIXEL) * 9 |& y/ s# b/ z5 s8 z
GetDeviceCaps(hDC, PLANES);6 u0 ?& L- z+ L4 o6 A. h' @! I
DeleteDC(hDC);0 g \% |& I, ?) `! ?. a
if (iBits <= 1)& e# H9 V( n7 z& |1 X n
wBitCount = 1;8 z" _' g0 v+ |
else if (iBits <= 4)
, x1 P, k9 y* F' |" l! q7 G0 S) f wBitCount = 4;
- U! Y# s, \3 R: c/ E5 p else if (iBits <= 8)$ k0 D! m1 k4 c6 p9 I
wBitCount = 8;' ]% Q* \4 B* r n4 O# Y3 H
else if (iBits <= 24)
9 F( J5 K0 _9 e4 C0 p$ K0 T wBitCount = 24;
+ Z' d/ [6 Y0 U9 r3 j# q" A4 q% n4 N# q
//计算调色板大小2 P( h- `6 h8 N- h' m
if (wBitCount <= 8)+ c X9 I: q+ Q& y% G/ e# q. X
dwPaletteSize = (1 << wBitCount) *sizeof(RGBQUAD);1 i& S) Q! O" @" x) F. ~2 ^
9 i) t4 S; s9 z% T' \5 A& D: {( r //设置位图信息头结构
8 g# l2 ~8 r1 o7 u* d- V GetObject(hBitmap, sizeof(BITMAP), (LPSTR)&Bitmap);
& Z3 d- M. m) z. _) Y bi.biSize = sizeof(BITMAPINFOHEADER);
% m& ?, O6 o) A$ J bi.biWidth = Bitmap.bmWidth;
, E' [& J; u o% I bi.biHeight = Bitmap.bmHeight;
# [2 Y1 l5 r0 F6 r4 q" Z4 U: j bi.biPlanes = 1;$ h3 \& r# Z- ]) ]' {
bi.biBitCount = wBitCount;
) u: R# ^# i) ^ m- H bi.biCompression = BI_RGB;8 @; [8 v& d$ {
bi.biSizeImage = 0;% T7 \) g1 A6 a3 W
bi.biXPelsPerMeter = 0;3 S! q" ~ y9 [& V* t- m7 J$ r
bi.biYPelsPerMeter = 0;. y4 h+ q# F6 a+ U& ~; \
bi.biClrUsed = 0;# r1 _/ V/ ]# U8 i1 N+ z
bi.biClrImportant = 0;
. d0 P, `: D+ G& I. E dwBmBitsSize = ((Bitmap.bmWidth *3 d7 b3 Q. U5 k( J: ]' u1 @
wBitCount+31)/32)* 4& A0 A3 a8 |' |; k5 r# G
*Bitmap.bmHeight ;
9 Q8 K2 E5 N+ M; \$ d4 a$ S! c3 Z1 \
//为位图内容分配内存
: g/ D4 I6 v4 e ^( w* {! j hDib = GlobalAlloc(GHND,dwBmBitsSize+1 K, O/ i# X' ]4 N; Y! e1 x
dwPaletteSize+sizeof(BITMAPINFOHEADER));) D T) Q! Z' R, L; u9 J0 m
lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDib);# k. R/ P, b7 x5 R
*lpbi = bi;0 ]! O$ H& ^% r6 v+ c- g: p
. {" N8 x9 R9 @$ U, t7 a6 | // 处理调色板 ( M0 P( Z) G" x3 Q
hPal = GetStockObject(DEFAULT_PALETTE);
- B" g, F5 [( |7 @ if (hPal)
/ C4 ^: {0 i' y {
3 Q7 b x. E: @' a hDC = ::GetDC(NULL);2 q/ ~8 R: n k- N9 g# b0 v& f
hOldPal = SelectPalette(hDC, (HPALETTE)hPal, FALSE);
" f9 J. l0 g- G B RealizePalette(hDC);. E, w& S6 g4 y
}: V& I; W' I% n- n
" j- c" {5 q- s! Y# G$ D& x8 z) L // 获取该调色板下新的像素值/ Y" i6 J" ^. i: U- b+ p
GetDIBits(hDC, hBitmap, 0, (UINT) Bitmap.bmHeight,
! N) y0 Z: e6 G$ `4 F (LPSTR)lpbi + sizeof(BITMAPINFOHEADER)+dwPaletteSize, |+ H) M1 r7 P' k
(LPBITMAPINFO)lpbi, DIB_RGB_COLORS);
R/ Y V9 ?' k* H' c! T$ Z! f5 _, ~! s8 e6 U: a
//恢复调色板 2 K2 l) s( a& q; e
if (hOldPal)% F2 \6 |9 Z3 O, O1 N0 Z
{
. q4 A" Z) ?) D: C SelectPalette(hDC, (HPALETTE)hOldPal, TRUE);
, K) \# B7 K- c/ B RealizePalette(hDC);; A# M' k4 {5 M4 Z5 G; q# U b1 Y
::ReleaseDC(NULL, hDC);
4 c" `+ l$ F" @- S0 H! T }+ E9 X9 F+ M$ u
. N% z7 {5 g2 [( x4 l9 m2 I //创建位图文件 2 `, ^0 J8 U$ V2 Z- r2 Q! e
fh = CreateFile(lpFileName, GENERIC_WRITE,
. a% |1 L2 u& k" G1 \. C 0, NULL, CREATE_ALWAYS,
! m, x% ?7 y" j5 F9 Q: v FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, NULL);, C( j# [+ }# P+ W! i8 o
if (fh == INVALID_HANDLE_VALUE)9 }. _- V- y* f
return FALSE; |% a5 R% P# v0 w" F" u; k
7 t" M: A+ M+ x) W; Z) v
// 设置位图文件头
! I; P+ N3 F2 W bmfHdr.bfType = 0x4D42; // "BM"& }. }7 K, e+ ]% L/ L" i8 _" p0 H
dwDIBSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + dwPaletteSize + dwBmBitsSize;
$ A- C( k$ @! Q3 K/ G bmfHdr.bfSize = dwDIBSize;
. l+ B) t c# g v: y' p5 r; q bmfHdr.bfReserved1 = 0;
8 ]; V, _: {1 _( @# k4 ~ bmfHdr.bfReserved2 = 0;
8 g4 D. o* D2 g: B bmfHdr.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER)
* a5 ^# q. L% e( J, o + (DWORD)sizeof(BITMAPINFOHEADER)
! ~! A) X8 O, P! S i + dwPaletteSize;
" r9 H* F1 m! a( X4 Y/ e* c+ B) H: D& c0 \+ d' S( f
% N0 A* { o& C9 g: ] // 写入位图文件头
, M% ?7 W0 }2 V$ D ] WriteFile(fh, (LPSTR)&bmfHdr, sizeof. L( B. p- N( h0 |
(BITMAPFILEHEADER), &dwWritten, NULL); w/ X* O+ b" Y, e, K" l
3 _1 {6 b( F0 i4 _# }# G // 写入位图文件其余内容0 t# |' R# c; w5 s
WriteFile(fh, (LPSTR)lpbi, dwDIBSize,
. ~: ?/ F8 n$ u8 U7 g% Z p &dwWritten, NULL);
5 k5 a! t& q$ U! E7 U
+ W/ v" |: X. y- H9 N/ c; L //消除内存分配 Q4 K* a1 F6 U B
GlobalUnlock(hDib);+ W S$ |9 ?) S+ B, M+ j( u, W
GlobalFree(hDib);( K4 E0 E" k0 @* |& }' S3 {* `
CloseHandle(fh);
/ r* f) f' |' N! _$ |& X8 |) @/ b4 S- H' q
return TRUE;' T( l/ k7 r/ d* s' I
}
9 \% I; S5 p1 r) h' a; ]; ^# a9 A5 u1 ?, S; s$ b, P
# Y+ \7 I$ }6 C
20. 如何获取局域网上计算机名及它们的IP地址
1 c) y) i) n. V# g- I* e0 A2 }& q' O, n# V1 l* U
l 连接ws2_32.lib和 mpr.lib库
- L( Z' Q) A& W, k c" B* w$ h+ `2 S6 v" L
l #include winsock2.h
0 A+ G1 u: q: D+ d7 D' Z
9 D' y y/ X; V0 j- }! F1 iCString strTemp;
" ~$ o* {6 c+ I& @# Pstruct hostent *host;3 O% p3 U+ l _ U% T2 G. }/ s
7 f; a+ t, {5 r7 f- Y
struct in_addr *ptr; // 检索IP地址 - I- _* `& p: b% M- s; \; j
DWORD dwScope = RESOURCE_CONTEXT;# j" w8 q: H0 E* f0 `* Q, K* F3 }
NETRESOURCE *NetResource = NULL;
9 T8 E, J ~$ {( i5 _HANDLE hEnum;/ Y0 R$ i. c1 m; ?
WNetOpenEnum( dwScope, NULL, NULL,
% p/ }- z; N; [! } NULL, &hEnum );4 a% z- J Y' L. h9 Z: U: ?
, v8 n% c3 x* tWSADATA wsaData;
, s8 m/ R" G) P9 ^WSAStartup(MAKEWORD(1,1),&wsaData);
$ N! c2 X/ Y. K: d1 f+ p# r7 t% B+ E" W9 z% ~
if ( hEnum )* L, a5 Z; Y* t4 D8 q4 n
{
/ V" u3 _4 D/ f) [+ s DWORD Count = 0xFFFFFFFF;
7 P7 H3 x# K0 V DWORD BufferSize = 2048;
- j/ m# C8 ~( Y$ l, G! E: H/ H; ^ LPVOID Buffer = new char[2048];- c& b) q& \) m2 t
WNetEnumResource( hEnum, &Count, 6 D' Y9 C k! Y' {) a, t
Buffer, &BufferSize );- I( X' d0 Q$ o, `2 R% m
NetResource = (NETRESOURCE*)Buffer;
- p# x H; k9 @# L6 E- q9 n N; x+ C, P/ S! x$ `; B% K. V
char szHostName[200];
, U& f3 d* Z- R! j% d unsigned int i;: X U# e& Y5 H
" a3 A- H4 E: ?# l+ T! E for ( i = 0;
' `7 {0 x& v& K: t. @: [8 x i < BufferSize/sizeof(NETRESOURCE);
0 |' j, |+ I4 b$ K i++, NetResource++ )
5 ]2 Q4 O M8 Z+ X. d* H2 { {
) P8 T; a" X4 u4 B if ( NetResource->dwUsage ==
! ^! M; S$ }+ s) M) d/ }/ f- A RESOURCEUSAGE_CONTAINER && + L ~ \$ o# H) \3 R) _
NetResource->dwType ==
& c7 E; Z+ h ` RESOURCETYPE_ANY )
5 i! X: `( _ O! f4 Y& C {
/ Z4 C# n4 A; ]& h if ( NetResource->lpRemoteName )
8 L1 N2 y3 i- \$ J {
/ y7 l# e: Q8 x: u, _ CString strFullName =
6 _7 o& w1 ?6 y2 F, N$ w, Z6 r NetResource->lpRemoteName;, C( C7 U8 e0 Y0 _, n2 g3 j
if ( 0 ==
8 @9 c: s) r! k* R! A9 k strFullName.Left(2).Compare("\\\\") ) / c% _$ Q3 g7 V
strFullName = * s% i" R/ c0 u% c# Q+ V+ u
strFullName.Right(! |% ?" x. G7 N0 U+ e. v L
strFullName.GetLength()-2);, J* P8 w! }4 V% X- `! q9 A
& ^1 p: {" ?* x) a5 q2 I* t
gethostname( szHostName,
: o2 e+ ^' @1 O( T$ g: K2 h7 [ strlen( szHostName ) );
! g2 `% B' H3 E3 | host = gethostbyname(strFullName);; A. Q( z9 t' U" J$ M8 n
S# k! v2 Q9 c& c# u if(host == NULL) continue; * p- T" B3 J( C$ h( r1 f2 a" n
ptr = (struct in_addr *)
) U* z# D+ E$ o& H6 R) |( F8 X host->h_addr_list[0];
. ^$ X# {' I/ Z: F* _) G, y. c9 P
// =. 分隔开IP:211.40.35.76.
' V: R. ?; n" M int a = ptr->S_un.S_un_b.s_b1; // 211 $ m" {7 x) q+ a) z' _$ A o) K+ ~8 z% t
int b = ptr->S_un.S_un_b.s_b2; // 40
2 x% N6 ?1 V1 x, p8 o int c = ptr->S_un.S_un_b.s_b3; // 35
7 A ? Q" E; E3 d1 t$ h2 c# v int d = ptr->S_un.S_un_b.s_b4; // 76: l7 H' J9 ~- h5 T; J* c2 K
B, y( e7 V$ c- O" g6 ]
strTemp.Format("%s --> %d.%d.%d.%d",
, K4 \; H2 ~0 V. B0 n% n' t4 K4 d strFullName,a,b,c,d);6 c$ b) v7 f' R3 |, f: K
AfxMessageBox(strTemp);
: X: t6 [. }9 A/ f7 h- k5 g8 k }
) N9 F$ o0 v2 f/ {: p9 s0 S* i& s }
3 A6 g6 P& }% K }
! C A( ^% M2 Z( u2 |# P% b+ Z8 X3 z
delete Buffer;0 f; D u! L6 ]( N: @: C# p3 `2 S
WNetCloseEnum( hEnum );
7 X' Y ~8 W- s+ S. b: k% a! t}
8 x' V6 A: T& c# \# r, ]7 q! [2 d' R8 u" a5 i
WSACleanup(); |
|