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编程技巧20法(11-20)
! u2 p- X2 Y; g3 \. P% L8 @* v( P! V6 j 徐景周& r. u. c4 E; i' V R: V
日期:2002-09-12
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11. 如何判断当前操作系统的版本
$ u+ a5 e8 T$ A) d$ p
& B' @0 L% E8 E9 O/ I8 c5 o) j//------------------------------------------------------------------------------------------------
+ ]* ?! k, p" w# A
0 o( U6 m9 }2 [//判断操作系统涵数及变量3 f9 K% Z8 D/ E; ]4 V- B# m
3 R/ r: v4 K" }$ Y ^1 S, l @) j
typedef enum tagWin32SysType{
6 ]( J7 x9 [) k0 l ^: y Windows32s,/ b" u1 ~3 y7 ^& U
WindowsNT3,/ @$ r' F* E2 h
Windows95,+ v5 p& d+ r1 m' P
Windows98,* [, W% b5 }+ t& ^2 ]
WindowsME,7 b/ {; q: p9 p+ B; Z
WindowsNT4,
2 a7 A- q4 C( R2 g6 I5 @ Windows2000,
" _8 U' ~+ {$ z$ \+ G' h, p WindowsXP
8 C! b1 u; D7 Z}Win32SysType;
& ?. ^. d1 @8 z$ h3 [+ \, Q6 Y3 A( w3 t! g4 q
$ H. _2 o) n# R+ G/ W; f//判断操作系统涵数及变量,jingzhou xu0 o' q2 u* X! P3 t& J0 O
# C% p* K" K& n( }Win32SysType IsShellSysType()
. O5 l5 d7 i( i. w8 Y{2 ~4 ^7 S; q3 f' r: A2 y: e
Win32SysType ShellType;) R3 v; a) P G' ?9 @2 Q
DWORD winVer;
* G$ b: l( P1 }+ U OSVERSIONINFO *osvi;6 W. W% G2 U2 ~5 G9 c: q
( X3 [: G, n( H7 W. b D2 o winVer=GetVersion();
/ G' e/ a: ^! |( b% [ k* o" u$ O3 W6 w
if(winVer<0x80000000){/*NT */
7 O# S& N. H- \& a K3 G5 X ShellType=WindowsNT3;
/ N a! t3 [1 k( G, @4 s osvi= (OSVERSIONINFO *)malloc(sizeof(OSVERSIONINFO));
# |. Q3 K- P4 B: `+ d, _* z' ? if (osvi!=NULL){' W( m1 ?' [: M+ ^; z7 f% C0 c
memset(osvi,0,sizeof(OSVERSIONINFO));) \9 }* |0 m- o7 g: c
osvi->dwOSVersionInfoSize=sizeof(OSVERSIONINFO);3 e/ e' _' \2 {7 [. y" D9 D
GetVersionEx(osvi);8 i( U) [& P3 W1 ^% k& d3 r: D, p9 X
if(osvi->dwMajorVersion==4L)ShellType=WindowsNT4;
- x) J4 x( z4 K# |1 m else if(osvi->dwMajorVersion==5L&&osvi->dwMinorVersion==0L)ShellType=Windows2000;
: {8 o# y3 S F3 p5 c9 T5 X* _ else if(osvi->dwMajorVersion==5L&&osvi->dwMinorVersion==1L)ShellType=WindowsXP;7 r6 O8 X. i( N) t
free(osvi);
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}
, q, J; ?2 N. Y1 A8 P else if (LOBYTE(LOWORD(winVer))<4)
, p: j) R& C: X% Y, B$ b$ Q' w ShellType=Windows32s;# R. d6 n& C" M) Q
else{& J- G! d; J, y% s$ i" p
ShellType=Windows95;1 e ~9 ]3 {# E V% T
osvi= (OSVERSIONINFO *)malloc(sizeof(OSVERSIONINFO));: d" k) z4 s) l
if (osvi!=NULL){
1 b u# o- y0 D0 @5 r memset(osvi,0,sizeof(OSVERSIONINFO));
2 g, w, M% ]$ q5 p& w( H% W osvi->dwOSVersionInfoSize=sizeof(OSVERSIONINFO);5 R5 a4 J! J# d7 T; S% {
GetVersionEx(osvi);
+ ~* g! I# C2 m if(osvi->dwMajorVersion==4L&&osvi->dwMinorVersion==10L)ShellType=Windows98;
2 P6 U# L5 V" M6 y5 w. J else if(osvi->dwMajorVersion==4L&&osvi->dwMinorVersion==90L)ShellType=WindowsME;) p: b- b: M! g( v( [
free(osvi);
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% N; n- t* ]! f& d return ShellType;
7 }" }, j# p) A) v6 W}
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//------------------------------------------------------------------------------------------------; u) T& Z! P: S8 O0 ~6 [
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12. 如何在指定矩形框内水平/垂直显示多行文字6 s2 h8 C# s0 u
! ?6 u' `7 ?7 Q. J' M2 m, o///////////////////////////////////////////////////////4 D c% l5 {' }/ N
//说明:
+ w+ l, @6 W! ?, A6 [// 在矩形框中水平或垂直显示多行文字,jingzhou xu.+ k! L5 N5 E8 v0 \7 I0 ?2 d; r5 X1 u
// lMode: 排列方式,0:水平方式; 1:垂直对齐 8 y8 B f+ A5 X0 O: S1 @
// lHori: 水平对齐方式, 0:左对齐; 1:居中; 2:右对齐; 3:自定义4 u% j) K/ Y6 h; _8 f
// lVert: 垂直对齐方式, 0:顶对齐; 1:居中; 2:底对齐; 3:自定义
# Y9 B3 ~, O' |///////////////////////////////////////////////////////
( n( O6 s0 D2 ?$ N8 |/ e& H' h5 {6 e8 [5 [' Y) ^
CRect DrawTitleInRect(CDC *pDC, CString szString, LPRECT lpRect, long lMode, long lHori, long lVert)
/ }/ Q3 w! S1 R+ P. e{5 [7 C4 y* Y g$ W9 a7 l& ]
TEXTMETRIC tm;
: B4 F% D4 P6 X" g pDC->GetTextMetrics(&tm);
4 Y# [; ]. M* C1 D; ^( z int tmpWidth=tm.tmAveCharWidth, tmpHeight=tm.tmHeight;
* _! r# o/ Q/ S( f! u6 S2 I [$ }. G; T8 _" K2 b
CRect rcInner(lpRect);
# T) }: a: B' _/ U& ~9 b2 P if(lMode==0)- B& e( t: C+ s% b- C$ z1 ^- O4 h
{
% J5 }# I% F* i: e1 k4 a rcInner.left+=tmpWidth;* ?* h* k0 J0 p! T- j0 j3 i; ]
rcInner.right-=tmpWidth;* R! _- f! `9 ^
rcInner.top-=tmpWidth;& i9 w! I* ]" z+ _# `% ~
rcInner.bottom+=tmpWidth;
5 N% b, K- M- h, g6 B }& `6 p. l* X8 ^1 b5 U1 E V: B
if(lMode==1)
5 J, p. O: G. ~$ c& o {" ^( ^& Y8 ~" x& i' a* F5 ~
rcInner.left+=tmpWidth;
' N/ f# T: I8 Y rcInner.right=rcInner.left+tmpWidth;
1 |* s9 d7 H3 e: O- V1 P: R rcInner.top-=tmpWidth;; M5 G) s0 i( Z. b
rcInner.bottom+=tmpWidth;
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1 b, c$ {( j, d$ c8 F
pDC->DrawText(szString, rcInner,DT_CALCRECT);% [. i3 x7 e) |% W8 v7 z' l2 p- J7 B
switch(lHori)
, o( B$ m8 x2 m* s, A% [+ h {
' F2 |8 ~7 j W9 N case 0:
! a9 z/ N2 _8 [7 {$ a" L, A break;
: g' Q0 E' N( |- {2 R. {& x! y' N4 N case 1:
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long xOutCent=(lpRect->right+lpRect->left)/2;! W- u9 f7 m5 ^- B6 R0 p
long xInnCent=(rcInner.right+rcInner.left)/2;
; \) ^- e6 Y, J! I5 U7 F$ M rcInner.left+=(xOutCent-xInnCent);
: o, B4 m- v4 M! y rcInner.right+=(xOutCent-xInnCent);: G) E4 S" t8 V9 f2 G6 E& E% H
}1 K: U3 @! X. a3 T$ P& P# O
break;
# C! j7 g1 R% q: Z# W3 N( ^ case 2:
6 z2 U: ?( P- g" V* W; h {
2 [7 O A0 d' \ j0 ?8 ` ^& M long lInWidth=rcInner.right-rcInner.left;
' f9 \! `$ F3 ~2 T0 Y, f7 C rcInner.right=lpRect->right-tmpWidth;" d; l8 {6 Y0 B6 ~/ u; f) V: z
rcInner.left=rcInner.right-lInWidth;% d- r6 W& c7 i' a' c7 v
}
( _: i9 ]4 ?4 t break;
( a0 F4 x r- m) }& D; ?% I default:1 s4 J* l3 B, _1 }+ f9 S
break;
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, j5 T* q: c3 Z J# j switch(lVert)! P5 @' O( S) k8 ^
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case 0:
4 j; h+ q' N5 |3 y break;: X: ^3 h( J* p) `
case 1:
% ^: w P: L, k0 U3 B {1 d" i. y" k3 z b! z% {
long yOutCent=(lpRect->bottom+lpRect->top)/2;
, K5 B' P3 C( Z* e long yInnCent=(rcInner.bottom+rcInner.top)/2;' e3 ^/ q U9 Y2 @' D
rcInner.top-=(yInnCent-yOutCent);; v! @% t8 ], G/ y) `3 g
rcInner.bottom-=(yInnCent-yOutCent);% Y0 z; `) Y5 ]1 H, b
}7 Y2 X8 f$ b8 E* I& \) w6 c
break;
$ f, ~2 N5 x: Q) T2 ^/ ] case 2:
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long lInHeigh=rcInner.top-rcInner.bottom;
; y: \. p9 C" h) o0 t rcInner.bottom=lpRect->bottom+tmpWidth;- K' r E& I- L2 H
rcInner.top=rcInner.bottom+lInHeigh;
# p8 x/ r) n' Q& o- _3 z7 v8 a }
/ c0 @9 Q9 N: p5 P break;; Y! E1 s/ ~* a, _- g
default:
) y) t% m$ f$ v. L( K! Y1 A break;3 I, |* m& d5 U2 ]
}
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//---------------------------------------------------------------------------------------------% ^8 b4 m. Z0 S& r
//功能:根据新、老矩形,重新计算行数,使文字多行显示,jingzhou xu
# Y2 [9 N! `/ L/ o* w3 S/ t# ^7 e //---------------------------------------------------------------------------------------------
) }, ]5 U0 y W# I //一行中最大字符数; f) ~, [+ ?- J
int nMaxLineChar = abs(lpRect->right - lpRect->left) / tmpWidth ;
. W' o1 b6 c' \$ t; d //记录当前行的宽度5 l% ~* K2 \7 ?
short theLineLength=0; ' _4 A+ w: T+ M( E; n
//记录当前行中汉字字节数,以防止将一半汉字分为两行
+ M- X: x7 I2 P. s1 X unsigned short halfChinese=0;! X3 H) l C2 ?' f- u: ~
* w: b! O: T( u$ ~2 T/ Q# c8 v* v 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))9 p; `1 \, L6 n1 ~7 o. T8 Q
theLineLength=0;
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//大于0xa1的字节为汉字字节% ~- B) ^: U1 m* S1 Y7 M: t
if((unsigned char)szString.GetAt(i) >= 0xA1)# N. c, f g8 g4 B5 N( F5 t q& H) s, `: p
halfChinese++;! H% n$ `9 h) o- ?+ ^
theLineLength++;- d- v7 q' x$ G% N- e1 ^& K7 n) O
% C; a& ]: p. P* X! H
//如果行宽大于每行最大宽度,进行特殊处理
0 ] ~8 U! U# k, G; B* Z U6 K- y if(theLineLength > nMaxLineChar), ? i7 m# \" F8 O, v, k3 o* G/ i6 v6 H
{( _+ K. j- t; [& A
//防止将一个汉字分为两行,回溯' t: E/ v: ]$ D0 J1 _; v" ^( D3 o
if(halfChinese%2)
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szString.Insert(i,(unsigned char)0x0a);
7 a& R7 \4 }" U, F9 n: n" K szString.Insert(i,(unsigned char)0x0d);
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else% E8 ~. G5 q; z: A) ~* c0 g2 P
{! {0 [6 o' ]; H" t& C. W! ^) H
szString.Insert(i-1,(unsigned char)0x0a);+ |2 j* C: x" ^. ~1 ~
szString.Insert(i-1,(unsigned char)0x0d);
1 v+ N$ @5 u6 B7 R: C8 h }
6 {' n- `* m1 s7 N U* ]
4 K/ b6 g/ q; S- k7 z theLineLength = 0;
; W! }7 j6 k- u6 g5 u }
* [9 U- L7 [( [2 a# s }$ V& R9 q/ L% I7 F% E
7 Z+ x E: m3 y4 o //重新计算矩形边界范围) ^$ n* A1 q) z6 X- I
// int tmpLine = int(abs(szString.GetLength()*tmpWidth / abs(lpRect->right - lpRect->left)-0.5));
1 S3 k5 P9 c! \
1 b, q$ H/ T% n( D// tmpLine += (szString.GetLength()*tmpWidth % abs(lpRect->right - lpRect->left))? 1 : 0;# j u# {- H* y& `* B4 k
// if(tmpLine == 0)3 k9 P, M: _$ X% Y
// tmpLine = 1;
" L( A1 k) Y" b0 i8 L6 u1 S* E! m2 F' R4 @( ?/ @, k" h; I. `# o* U
if(rcInner.bottom > lpRect->bottom)7 k- S7 ]% T' S$ o( n* p& L
rcInner.bottom = lpRect->bottom;) d; r8 p1 I1 w6 e3 _: J
if(rcInner.top < lpRect->top)
3 t$ `( M, U0 S B) C rcInner.top = lpRect->top;
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//---------------------------------------------------------------------------------------------* |8 g1 a, h2 }* k
& |+ r# k( R0 q7 t9 X8 X
if(lHori==0)
! W# g$ N) T" N6 i. R$ a pDC->DrawText(szString, rcInner, DT_WORDBREAK|DT_LEFT);9 ?& T4 p- r7 R! N# v
else if(lHori==1)
# i3 L/ ~# x F, S pDC->DrawText(szString, rcInner, DT_WORDBREAK|DT_CENTER);( R& I' i3 U9 ?- a8 f8 p, Q1 W
else if(lHori==2)4 l' ~2 M0 e5 W' z4 F4 q9 U
pDC->DrawText(szString, rcInner, DT_WORDBREAK|DT_RIGHT);. q Y; J$ v8 y. H
return rcInner;0 i. O8 Y( c6 b
}
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13. 如何在指定矩形中旋转显示文字
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///////////////////////////////////////////////////////
, \$ Z- P% P2 j; ~% A//说明:
( f# t" U1 a- U* q) [// 在矩形框中旋转方式显示文字,jingzhou xu
3 p7 g1 `' U* b6 s1 q//参数:
0 x1 ?. N) i" C6 `, |: c: Z// pDC: DC指针$ c! c; i6 P- ?; v9 l) c6 m
// str: 显示文字/ F# v- m2 ?9 K- R# i1 B' x8 r+ e
// rect: 显示范围
0 s; }" k" `7 k5 r7 A. I$ I4 d// angle: 旋转角度
! L8 [* t) `! A* q6 h" ~3 S// nOptions: ExtTextOut()中相应设置# E1 k* k, x1 p! X4 `" u; |
///////////////////////////////////////////////////////! B- U6 q, i' U' u
7 y3 u& S+ R6 r8 yvoid DrawRotatedText(CDC* pDC, const CString str, CRect rect, $ y" h% C: x( M( V+ Y4 L
double angle, UINT nOptions)5 [" M# \: b: A
{
* M& ?+ A: j: _' A //按比例转换角度值
* X" d9 ~1 i q double pi = 3.141592654;
* N E# O. N0 m$ t3 ~ double radian = pi * 2 / 360 * angle;% q- p! |2 U1 m
2 s' L$ L8 B' H9 r q( g
//获取显示文字中心点
* o" z( `" r- N: d9 q7 q CSize TextSize = pDC->GetTextExtent(str);
+ S/ r1 d3 @4 n" S# w( r% [2 e8 v CPoint center;
' T( a$ q; m$ B9 P( h: G, G center.x = TextSize.cx / 2;6 h) q: V) \" s) y5 D
center.y = TextSize.cy / 2;2 E" P5 A* B) O$ ^# v# g
7 Z, g6 a v) Q //计算显示文字新的中心点5 u& M/ p9 S# P& U8 H5 X; M. V
CPoint rcenter;. i* {- H" ~# \
rcenter.x = long(cos(radian) * center.x - sin(radian) * center.y);
. C, @6 z, C% I7 p! o7 p rcenter.y = long(sin(radian) * center.x + cos(radian) * center.y);; c* B7 S* Y1 G) G
7 a t+ P0 M( g# B) T" p
//绘制文字0 _9 G( {+ q4 L j8 n! t7 s2 a% J7 r
pDC->SetTextAlign(TA_BASELINE);5 k n* C: Q0 P* j$ K
pDC->SetBkMode(TRANSPARENT);
. P8 a2 w4 f4 a% J pDC->ExtTextOut(rect.left + rect.Width() / 2 - rcenter.x, / T- E2 q' l9 N$ J
rect.top + rect.Height() / 2 + rcenter.y,3 j8 ^* _8 }, |) y
nOptions, rect, str, NULL);1 S" X v, O+ m1 \5 U6 n
}
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14. 如何将32 x 32像素图标转换为16 x 16像素值的图标 U( V* r) |5 j c
4 J/ K9 g4 D _4 `HICON Convert32x32IconTo16x16(HICON h32x32Icon)
' C4 Z5 h, E) h& `0 A0 y{
+ [' @ R+ F4 j HDC hMainDC, hMemDC1, hMemDC2;5 l- b+ D& m; G( d
HICON h16x16Icon; g; G8 r) @7 R0 [
BITMAP bmp;4 G. G+ N* k ]* D+ v; Q" A
HBITMAP hOldBmp1, hOldBmp2;# X: m( j ~" o3 J* M7 t
ICONINFO IconInfo32x32, IconInfo16x16;
+ x, Y, w4 l5 i4 a* l! U( l
5 P N" Y0 R0 h+ s GetIconInfo(h32x32Icon, &IconInfo32x32);
3 q& ~5 U: ^% c) Z% k6 l9 x4 t {' m# ]+ ]
hMainDC = ::GetDC(m_hWnd);7 P, W4 P' |0 t4 x
hMemDC1 = CreateCompatibleDC(hMainDC);+ K8 ]7 J9 s$ I3 O
hMemDC2 = CreateCompatibleDC(hMainDC);
& H' h% p/ w8 T7 _5 }, @9 c& j8 {
GetObject(IconInfo32x32.hbmColor, sizeof(BITMAP), &bmp);
}! W; Z+ c3 q+ ?# O. W. e& J) m C8 t
IconInfo16x16.hbmColor = CreateBitmap( 16, 16,
5 Y' G* b$ i7 r/ e# o* D2 o8 L bmp.bmPlanes,
! `% b& u3 ~4 Z! S% P3 p* N* B9 H bmp.bmBitsPixel,; j+ D* h G. I Q( h% U
NULL);
7 @+ l: F7 j4 c
- H& r; u/ D0 Q# g" \ hOldBmp1 = (HBITMAP) SelectObject( hMemDC1,
* g1 O* W* M' J, _/ E IconInfo32x32.hbmColor);/ u# F! I* M; R: F$ Q4 \
hOldBmp2 = (HBITMAP) SelectObject( hMemDC2,7 u/ S+ Z( B' }' O
IconInfo16x16.hbmColor);
# v5 O3 V0 J+ X
' n; d: t @& k: l+ E, p StretchBlt(hMemDC2,
2 }! t9 ~ O9 F+ j. S 0, 0,+ _9 p; z! O3 \
16, 16,6 f$ o1 U& t2 }- ^: K7 ^
hMemDC1,* ^4 z; Y1 B& Y% p/ ]4 v8 g
0, 0,
% ^6 ]* M7 A0 S l 32, 32,0 E2 h; @ Z, I. }, @. K" f
SRCCOPY
9 m R6 v) `$ M0 u$ V x4 z& \ );
- j" Q8 ?+ q) i S4 z8 `( [
3 Q! n: ]! [6 y; p GetObject(IconInfo32x32.hbmMask, sizeof(BITMAP), &bmp);
* L: m/ c3 }. V# C
& G; ]. m; u1 W: U* S2 ]+ ? IconInfo16x16.hbmMask = CreateBitmap( 16, 16,
1 r, z ^# h5 n1 A* G4 K bmp.bmPlanes, 4 S$ L0 H+ N0 `& T. O
bmp.bmBitsPixel,( _$ [; ~1 p8 E- f
NULL);- Y8 Y3 \# G7 `7 q* }
. q& t! b4 {0 g+ c" N) i2 s7 b7 p
SelectObject(hMemDC1, IconInfo32x32.hbmMask);6 U6 K' P; |2 s' F6 X' ?
SelectObject(hMemDC2, IconInfo16x16.hbmMask);
4 V# Z, c8 L' [ r, X6 e8 J6 P# F0 o! W
StretchBlt(hMemDC2,9 j+ _6 L6 K8 Z T
0, 0,
4 f2 M' F4 P3 P* e 16, 16,+ N7 H6 _: l: k5 k7 R4 A
hMemDC1,
; j7 t/ `# q7 d4 K2 d N 0, 0,( B( [$ L% B& V; }+ L, ~, e+ D
32, 32,1 ]* Y$ u! A/ a& J
SRCCOPY
0 J! W$ P- e; h, j5 C o9 J3 f1 O );1 @: [- t# p: |# A
' k+ _; g) X9 \; P+ _3 Y6 D1 j2 V
SelectObject(hMemDC1, hOldBmp1);/ T+ R9 L0 O* r8 s
SelectObject(hMemDC2, hOldBmp2);% @ z: p6 c! c' v/ z
l5 z3 l! V0 x. R# w( P IconInfo16x16.fIcon = TRUE;
. ?& P+ y! N$ h" I h16x16Icon = CreateIconIndirect(&IconInfo16x16);
2 J: K; L F# W3 G DeleteObject(IconInfo32x32.hbmColor);
9 Q) W" _7 D8 g: g: G3 {5 c DeleteObject(IconInfo16x16.hbmColor);
+ Z" O& b2 T; N; `6 H9 g2 u. }* }8 d DeleteObject(IconInfo32x32.hbmMask);* K: P. T; S+ c
DeleteObject(IconInfo16x16.hbmMask);
6 Z1 k8 U# h9 M* M7 h! F DeleteDC(hMemDC1);
( S! ?& w) i+ Q1 W% j( O DeleteDC(hMemDC2);
! s- T) p1 {" V7 c% n% ] t: l9 _! T3 [8 y4 ]2 q1 ^' l& e/ `' J0 X. |
::ReleaseDC(m_hWnd, hMainDC);
* N7 t7 C7 y0 b4 w9 k return h16x16Icon;
/ P& a7 H; V" a& Y! l}
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# {9 r j$ V* v+ y4 |( _1 }15. 如何建立一个灰度级图标
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HICON CreateGrayscaleIcon(HICON hIcon)0 w7 R& ~3 ^+ j5 W
{! C& J% p8 P/ O. B9 u! D# _9 w
HICON hGrayIcon = NULL;& p0 Y5 P$ w+ `
HDC hMainDC = NULL,
) f' E0 w7 z; ^- \7 }8 v hMemDC1 = NULL,
9 p9 u: ^0 Z+ ]! Q hMemDC2 = NULL;" O9 N4 t, l3 _
BITMAP bmp;) R- t. H+ I6 c, f( n; _
HBITMAP hOldBmp1 = NULL,. K6 ^! ^9 S0 N8 J% e: O
hOldBmp2 = NULL;
1 ?- h6 r. c- |) \ ICONINFO csII, csGrayII;% W! W/ s7 ?8 P1 m0 a
BOOL bRetValue = FALSE;
b9 K+ L: e+ S/ B; u5 r3 ^; X) A) M7 X9 M
bRetValue = ::GetIconInfo(hIcon, &csII);& b2 x$ J, U$ s) Q( C* c9 Q0 L
! Q7 A! `3 d# X" J" e# v) a if (bRetValue == FALSE) return NULL;4 `+ Z6 b3 @; B$ i& O
, X& O- B: n& t( g7 `- } hMainDC = ::GetDC(m_hWnd);' {$ t! W- u0 L
hMemDC1 = ::CreateCompatibleDC(hMainDC);
) T0 v ?6 w1 d/ ~+ p hMemDC2 = ::CreateCompatibleDC(hMainDC);1 |2 g0 X2 R9 r4 j+ J
if (hMainDC == NULL ||
" { t* L6 h1 M; c6 Y6 p: w- ]6 B hMemDC1 == NULL ||# o3 ]+ y7 a1 e1 y7 B) V7 ~
hMemDC2 == NULL)
0 x$ a0 @! c8 f5 C) \4 t return NULL;, N5 c' [ i, }" p2 N8 o
: \& d/ y! O \, a a
if (::GetObject(csII.hbmColor, % g" u* v8 x3 ^
sizeof(BITMAP), &6 S0 u1 f, k* W
amp;bmp))
& r7 t. ]6 T) ^& R' _ {( t, `+ D3 L5 c& A3 n
csGrayII.hbmColor = 7 J) _8 u, a' Q+ G9 z
::CreateBitmap(csII.xHotspot*2,; R" d9 o# l! O
csII.yHotspot*2,
9 P+ ]! P; @8 v bmp.bmPlanes,
- X3 ?0 C1 O4 [- g' H3 S. J bmp.bmBitsPixel,
0 S; k% Z/ Q6 \* [0 v NULL);
; O4 m! u0 e' i if (csGrayII.hbmColor)! A/ V0 @; |2 K0 @
{
4 v# v( k. d6 F6 F4 e hOldBmp1 =
3 d6 }* C7 S! ~: F! [! b$ H. @ (HBITMAP)::SelectObject(hMemDC1,1 P3 h) C8 T% {7 A2 C
csII.hbmColor);! F4 ~$ E/ d5 I7 l
hOldBmp2 = - Z( `/ z" J& d8 d
(HBITMAP)::SelectObject(hMemDC2,
. D2 \, t1 T# Z& w; `( k csGrayII.hbmColor);
8 |: F" l& X3 u' q Q* B2 |9 h& @) c5 w
::BitBlt(hMemDC2, 0, 0, csII.xHotspot*2,. u+ k. ~0 g: i( @& o) p- }, m0 J
csII.yHotspot*2, hMemDC1, 0, 0,
- x+ [# H. v5 v; @ SRCCOPY);
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0 R" m5 g, l0 i, _0 a0 T) u DWORD dwLoopY = 0, dwLoopX = 0;- ~) N# M( R( V# {7 X6 ?
COLORREF crPixel = 0;
' s- o W# E: P BYTE byNewPixel = 0;* [: H d1 f! U0 j3 S- d
for (dwLoopY = 0; dwLoopY < csII.yHotspot*2; dwLoopY++)
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for (dwLoopX = 0; dwLoopX < csII.xHotspot*2; dwLoopX++)
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crPixel = ::GetPixel(hMemDC2, dwLoopX, dwLoopY);
, Q; `9 |1 {: L byNewPixel = (BYTE)((GetRValue(crPixel) * 0.299) +$ J& h3 A7 Q- b/ v
(GetGValue(crPixel) * 0.587) +
# L7 j7 j0 S l: C: ~. o3 g. m (GetBValue(crPixel) * 0.114));. ~3 p/ {6 r1 x% Q) ]+ }6 I& j
if (crPixel) ::SetPixel(hMemDC2,5 W4 t( X ?7 v1 n3 f8 h! a
dwLoopX,
0 U$ `9 }5 ^5 K$ c5 H3 ^ dwLoopY,
6 ]% i$ V3 I- Z: ?- L RGB(byNewPixel,
: J2 \* g% ?- x6 x4 z. R byNewPixel,
/ P! d8 N8 z1 J byNewPixel));' t5 s" l/ [* b: e/ T3 y
} // for
* x7 E& e4 c X, Z4 R$ v: x6 L9 T } // for
& Y# ^* ^2 J6 d- H/ Z# n ::SelectObject(hMemDC1, hOldBmp1);9 N5 B# V; o1 J, W% x6 F( `
::SelectObject(hMemDC2, hOldBmp2);( \; t6 `% k2 `5 Z
- C, Y) x9 Y8 j. c" G' k) x) h/ ^ csGrayII.hbmMask = csII.hbmMask;
& L/ `: _* V" Z# c& c csGrayII.fIcon = TRUE;
8 A% _% `4 X, ]2 @% y hGrayIcon = ::CreateIconIndirect(&csGrayII);; c" `! B: e j0 {5 c# i# }. D x
} // if F5 x2 v" z( Y
: eleteObject(csGrayII.hbmColor);% i" L+ S8 D8 B9 K# P) }# ^. A1 M
//: eleteObject(csGrayII.hbmMask);& K% o+ Y* D! ^) R+ e0 N) f1 u9 q
} // if9 j: k% Y) k- J
: eleteObject(csII.hbmColor);, l$ D+ g4 x! E. N) A
::DeleteObject(csII.hbmMask);: _+ j3 O' m. e
::DeleteDC(hMemDC1);
" y* y& A- _. D ::DeleteDC(hMemDC2);$ K2 c* E; Q% U: w6 J
::ReleaseDC(m_hWnd, hMainDC);" ^$ B: H1 F6 N0 ^. Y7 X3 t* K
; T0 O; D' s! g- a6 l* u' b9 n$ b return hGrayIcon;+ C4 b& m( ]. c0 `- J, j, G
}
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16. 如何按指定角度旋转显示内存位图(用法和BitBlt类似)
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' u6 ^0 B0 H r+ M" [void RotBlt(HDC destDC, int srcx1, int srcy1, int srcx2, int srcy2,
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HDC srcDC , int destx1, int desty1 ,int thetaInDegrees ,DWORD mode)" u7 Q/ q) p& H r b
{1 f* Q2 i$ O4 u6 d
double theta = thetaInDegrees * (3.14159/180);
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//原图像原始大小
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int width = srcx2 - srcx1;
* [3 d$ E4 q) @1 _! W: W int height = srcy2 - srcy1;: O. B9 Y3 L( T$ t
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( [- j3 I! q0 f' U9 n- p
//原图像中心点2 j) A- J! f8 ]$ M" i: v
int centreX = int(float(srcx2 + srcx1)/2);
/ S! `2 b% |: E/ Z6 U! k int centreY = int(float(srcy2 + srcy1)/2);# m# i4 I& _& J: P; z. O* `
8 ?8 l6 N1 ]: i+ s& o' ^ //判断出图像可以沿任意方向旋转的矩形框
2 }: r4 n4 \6 u/ |% k2 ~; O if(width>height)height = width;; R7 G6 O0 u: l0 k/ q
else: m% m- H; i$ ], t6 C/ V7 _* U! N, s
width = height;2 ?; ^. |9 ^* x7 [
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HDC memDC = CreateCompatibleDC(destDC);0 K, G5 y6 ^) V2 X
HBITMAP memBmp = CreateCompatibleBitmap(destDC, width, height);
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* }/ f8 m, H/ W2 A. I5 P8 h' G HBITMAP obmp = (HBITMAP) SelectObject(memDC, memBmp);
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+ O2 \6 T9 Z0 z3 d( ^0 _
9 h- R( e( |1 G0 P0 G: r$ K //内存DC新在中心点/ c8 V* R4 V) |
; X$ X. _7 }) t/ V' n' }0 a int newCentre = int(float(width)/2);
. K }/ [6 A3 {' I //开始旋转; f7 N1 m ^+ U
for(int x = srcx1; x<=srcx2; x++)
& w8 ?1 g1 x3 F+ f# W; t( w) } for(int y = srcy1; y<=srcy2; y++)9 s! @- m7 T+ X: L- o
{7 y2 n% X* w! t; K
COLORREF col = GetPixel(srcDC,x,y);, m% Z' m- Y/ q" z# Y6 x
int newX = int((x-centreX)*sin(theta)+(y-centreY)*cos(theta));
' D5 s7 G1 [/ {% j# Q int newY = int((x-centreX)*cos(theta)-(y-centreY)*sin(theta));- b/ X* q! \8 e
SetPixel(memDC , newX + newCentre, newY + newCentre, col);
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//复制到目标DC上" S8 u: w8 A5 |& t
BitBlt(destDC, destx1, desty1, width, height, memDC, 0,0,mode);
8 e, _1 L# K% P# f0 m //释放内存
4 G Y7 t {! x% X SelectObject(memDC, obmp);
% W" m" h6 |1 n DeleteDC(memDC);
6 r+ f5 a# g0 z DeleteObject(memBmp);( x6 n$ D% F/ h
}
& J4 Q8 O" O# d) _4 s
' l; j( s4 P# a/ ?0 J: b- T# ^
/ C3 f X! p4 }6 }% D @9 I用法:3 K4 `' A# }4 I
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RotBlt(dc, 0,0,150,150,memDC,200,0, 45, SRCCOPY);
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17. 如何将指定的窗体,以位图形式复制到系统剪切板上
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+ u5 j) N- i9 O/ N& Y Tvoid CScreenSnapDlg::toClipboard_Bio(CWnd * wnd, BOOL FullWnd)1 L+ s' c- ?* d6 H( |$ N1 b
{4 d( e, n% X1 f3 z( j) x' t
CDC *dc;
( X9 n. T: [0 F: ~" N) Y; q if(FullWnd)6 o" i E5 V! U# O+ h
{ /* 抓取整个窗口 */
' M$ q: N/ h5 v dc = new CWindowDC(wnd);2 ?( S q$ Z$ R* }, C
} /* 抓取整个窗口 */9 {( I9 a Q, J5 v5 V
else
; p8 `6 T3 W" H% n { /* 仅抓取客户区时 */% m- q# j8 i- a; [3 E& y
dc = new CClientDC(wnd);/ l( W% L# g% n6 F
} /* 仅抓取客户区时 */
+ U! P9 h* [& Y5 G( p' e$ L0 P0 w$ L0 H
CDC memDC;4 D; E$ e9 M5 v u+ t" Z
memDC.CreateCompatibleDC(dc);
+ y0 |5 ~" B6 p8 q2 R4 m) }
4 ^! \7 \& V$ q+ S7 ~" ^9 L CBitmap bm;' q% I$ \8 K: r. I
CRect r;
7 i2 S- b( H; q4 H1 _ if(FullWnd)' z2 E4 N9 ?& K7 G) U3 k
wnd->GetWindowRect(&r);
5 [8 e6 W, G- R+ b$ f+ A1 P$ r2 B else
6 P" f+ e* \6 j% I$ X I1 Z# n wnd->GetClientRect(&r);- _6 w! T D4 \& `& V
+ ~. B# @8 s M CString s;) _1 l+ ]3 g/ H) q% G! S
wnd->GetWindowText(s);& G" h; ?( i C/ U" {
CSize sz(r.Width(), r.Height());
' V' q* I: E$ x- X% [7 P0 r& {$ G, y$ o
bm.CreateCompatibleBitmap(dc, sz.cx, sz.cy);: s8 d8 E9 b6 I/ @- E$ Y) V
CBitmap * oldbm = memDC.SelectObject(&bm);
) K; t5 s9 p9 K- p( |. O" M: B memDC.BitBlt(0, 0, sz.cx, sz.cy, dc, 0, 0, SRCCOPY);0 p3 e- `2 E4 [$ U1 G& |) s2 G }' V5 m
) a, |3 A: e, y1 I& v/ `9 X
//直接调用OpenClipboard(),而不用wnd->GetParent()->OpenClipboard();+ c- l- d' l3 [# d+ B) ?1 |
wnd->OpenClipboard();
: ~3 R1 J$ F% s& x% Y' s ::EmptyClipboard();
7 R+ N! ~" ]- V: H ::SetClipboardData(CF_BITMAP, bm.m_hObject);. [7 g) r* D( ^, C. x
CloseClipboard();
3 _8 {) L# M; ]" V( G+ M
. ^. w) y; o' M. G1 t8 Q //恢复原始环境& U B$ U+ F2 {
memDC.SelectObject(oldbm);
) O8 ?" q' v# h) D& o bm.Detach();
4 z& q3 o3 O" C; K delete dc;
. q; s2 J6 |8 }7 y* p. g* y; Y8 @}9 `$ ^; }5 {) U* x9 L' q9 T
- o4 R) |6 o4 Q1 t. |1 o0 |" [* }3 _5 R1 ~2 b( \1 W
18. 如何替换HBITMAP中的颜色值
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#define COLORREF2RGB(Color) (Color & 0xff00) | ((Color >> 16) & 0xff) \
% k4 ]/ m6 [" O# o5 C1 |. E | ((Color << 16) & 0xff0000)% T9 L, i; S1 k
3 ?' o! E. ?/ y; }( Z6 u/ k$ E
HBITMAP ReplaceColor (HBITMAP hBmp,COLORREF cOldColor,COLORREF cNewColor)
) |: `/ L! w3 \# V* k5 {, [, O' [{) J+ c, G; S6 U6 U5 ^
HBITMAP RetBmp=NULL;
" w+ @ `* u$ K7 i! U! p if (hBmp)! y. y% f" z3 Z8 g3 z: s
{ , G* b9 g$ U) {6 }# O8 n
HDC BufferDC=CreateCompatibleDC(NULL); // 源位图DC, g9 m& F; O6 s/ ]' o3 Y+ n
if (BufferDC)
' x) V; c# Q2 f; _: | {
; b& `% V9 \/ x6 a; E1 q SelectObject(BufferDC,hBmp); // 选入DC中; N7 K2 C9 L# @! } Q
HDC DirectDC=CreateCompatibleDC(NULL); // 目标DC# I9 }4 S& {+ n ^8 Z# o+ A
if (DirectDC)
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// 获取源位图大小$ Y Z% P6 K7 I9 U3 e
BITMAP bm;5 O5 M& [% @, y; j/ y
GetObject(hBmp, sizeof(bm), &bm);
8 w0 y) C3 ], b. Y# i" O
' [* T6 e* w% j9 v7 V5 L) p // 初始化BITMAPINFO信息,以便使用CreateDIBSection1 x, o6 V, B5 i4 Q& M' H
BITMAPINFO RGB32BitsBITMAPINFO; 8 E5 i1 W6 S+ J( Q3 n
ZeroMemory(&RGB32BitsBITMAPINFO,sizeof(BITMAPINFO));; Z# g: ~( c( @) x1 g7 Z B
RGB32BitsBITMAPINFO.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
4 Y( K" P, Z4 G( n7 q( @ W RGB32BitsBITMAPINFO.bmiHeader.biWidth=bm.bmWidth;
9 T5 ?4 k/ A A5 k6 R RGB32BitsBITMAPINFO.bmiHeader.biHeight=bm.bmHeight;
- V/ |" d' L& K RGB32BitsBITMAPINFO.bmiHeader.biPlanes=1; Q$ o0 F ~9 Z2 q
RGB32BitsBITMAPINFO.bmiHeader.biBitCount=32;! B+ N" E1 B, Q; Q9 \
) ]7 N" L+ s" M; L UINT * ptPixels;
0 o9 B# }. o% i* a A7 p+ M HBITMAP DirectBitmap= CreateDIBSection(DirectDC,9 S7 k# T3 G8 b d; _. {+ D
(BITMAPINFO *)&RGB32BitsBITMAPINFO,
% y6 v3 w. y! h& w7 m8 @ DIB_RGB_COLORS,(void **)&ptPixels, NULL, 0);; \. L, l/ j/ `. I, y0 Q }
if (DirectBitmap)
% Z! F4 `2 N! _: ^ {
. B5 Y0 d) \; D( _8 s+ S5 f7 \ HGDIOBJ PreviousObject=SelectObject(DirectDC, DirectBitmap);9 z8 Q3 J5 K A4 h" r
BitBlt(DirectDC,0,0,bm.bmWidth,bm.bmHeight,BufferDC,0,0,SRCCOPY);1 _8 @& B! U7 \+ G3 t( d9 f, t
Z1 d8 F4 W6 e) ?( r // 转换 COLORREF 为 RGB
) x) [5 }* Z+ ?$ V4 W cOldColor=COLORREF2RGB(cOldColor);9 Y% _2 J0 h1 l* Z7 p# _5 u. O
cNewColor=COLORREF2RGB(cNewColor);5 O; z( B. o8 C+ Y1 _- G5 k
// 替换颜色& w0 b% X3 R) V' p# k
for (int i=((bm.bmWidth*bm.bmHeight)-1);i>=0;i--)# L0 g4 S8 j3 c! m" L( t+ h4 B
{
/ N8 q m8 K- F* C2 G if (ptPixels==cOldColor) ptPixels=cNewColor;
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, P1 A: L, F4 X j' r
// 修改位图 DirectBitmap
& P4 F6 V6 N7 a4 E* ~: a/ R0 V$ g q SelectObject(DirectDC,PreviousObject);) V& N9 \. x* J. u
# V/ h, [9 m6 e // 完成 n. j* b0 g) e" w4 m
RetBmp=DirectBitmap;
9 J6 n9 m8 b& T; C8 a4 { D }; E. J" b7 o& t
// 释放DC
2 k7 n5 k5 ~, g" a! }7 x DeleteDC(DirectDC);* e% W+ I4 u% S4 a; w
}- c% c& c% F7 Z9 ]
// 释放DC
% \! F9 {* ]* D# |- t2 \ DeleteDC(BufferDC);
# c3 G! l1 \( j; S+ X' X1 m }
$ i* X- Y' q$ C. j" Q6 H$ @ }0 s/ Z& H2 g* g1 `- H5 a E
return RetBmp;
/ j- N1 H8 A0 Z. a7 U! H5 H+ x1 @}
1 n9 P" n9 n& ?# z- N
! z3 F, M8 o% ~) [4 N+ [& t; ?9 S0 [# s( f# P( `5 i4 j
用法:
+ }: O! _* X q: }5 R" H( R' L" B7 Y9 ^6 r+ U! ]& }0 i& V
HBITMAP hBmp2 = LoadBitmap(g_hinstance,MAKEINTRESOURCE(IDB_SAMPLEBITMAP));' I7 O: w* O: Y( d% m
HBITMAP hBmp = ReplaceColor(hBmp2,0xff0000,0x00ff00); // 替换蓝色为绿色
+ W; I( s; `7 D K/ o& [......1 [1 j: r; C! x9 o. r
- y* t. [$ A5 [% ?) F* U7 w# iDeleteObject(hBmp2);
% A8 M* E6 {& o8 T8 j! ^DeleteObject(hBmp);# l, w7 P! X; n
5 A; X' B: E) V* B( j1 d3 G1 H1 q8 u6 Z
19. 如何转换并保存位图1 B4 U* Y/ f$ N1 w6 D0 ^) F
1 Q+ g+ k# d5 p" I//********************************************************************************& F, v- ]$ k! Y" }
//* 名称:DDBToDIB5 [: V) \# r# F% Q
//* 作者:徐景周(jingzhou_xu@163.net)
; g% X* J/ G8 O* k//* 功能:设备相关转换为设备无关位图
* e' Z- C; m% P) P; M) a* ^//********************************************************************************
/ C4 q! n$ Y1 G. O- X5 f W
2 z9 v! K. ?1 j& w9 V) _HANDLE CScreenSnapDlg::DDBToDIB( CBitmap& bitmap, DWORD dwCompression /* = BI_RGB */) % X$ H5 O, U$ J& p
{
0 M( ? w4 W: y5 i |% w BITMAP bm;
' k+ | W" q: n- z BITMAPINFOHEADER bi;
+ S, {$ Q" o6 ^ LPBITMAPINFOHEADER lpbi;
/ K8 l- k, }! L' m1 H- a DWORD dwLen;
' v6 U! i0 [2 R/ R HANDLE hDIB;8 K- B( |0 [* `/ b
HANDLE handle;
! J Q4 N) q8 \+ }/ v+ ^ HDC hDC;
8 r3 w8 _" |5 r P& k4 B HPALETTE hPal;
' v# u* Q6 M- |/ f+ H2 U* t3 |0 {3 b9 `" @0 X
CWindowDC dc( this );/ n7 y* @% I0 o3 p' V4 n) F
CPalette pal;
# j% K/ S7 k+ u" h: v8 o* B //如果支持调色板的话,则建立它1 m0 I* L3 p4 H9 F$ L8 `
if( dc.GetDeviceCaps( RASTERCAPS ) & RC_PALETTE )
3 M+ g, z+ q! ? w% _) E' T' H {
$ C! |: ?' A# Q* V UINT nSize = sizeof(LOGPALETTE) + ( sizeof(PALETTEENTRY) * 256 );
8 c3 ?( m4 p e7 `6 K! y) k LOGPALETTE* pLP = (LOGPALETTE*)new BYTE[nSize]; e+ ~0 {$ Q7 k3 @, e
pLP->palVersion = 0x300;& K, z7 f, u* A) X
pLP->palNumEntries = (unsigned short)GetSystemPaletteEntries( dc, 0, 255,
6 j$ c0 j8 i, {# J' z* C# L" k9 s5 r pLP->palPalEntry );* Q) |/ j' m7 D
* Q2 q) E0 t9 X8 n) i pal.CreatePalette( pLP );
3 j) ^7 z3 |" d2 ^
+ |& [& ?& U* q+ ? //释放
' q- o- a! S6 k$ L delete[] pLP;; B/ i2 M, ]" i6 ~
}
* F+ Q6 I; ~9 f
4 Q7 ^' k8 c; i/ l5 W ASSERT( bitmap.GetSafeHandle() );
* F0 N' [: ?, E' Z+ |2 h; A) ?
% r7 j8 W/ w* T S0 X1 |# ~! `
. `% c* _/ j9 d, t //不支持BI_BITFIELDS类型
7 i& p/ s4 v0 d if( dwCompression == BI_BITFIELDS ). Y& Q3 Q$ V5 Y6 i$ g8 _+ x
return NULL;2 s) P+ r& J# M8 F
4 W# _0 a6 H" ~, ^- r0 D+ a# G' D; e //如果调色板为空,则用默认调色板
, ~' L: s3 O: X; b0 T hPal = (HPALETTE) pal.GetSafeHandle();9 i. e4 _) o$ ]
if (hPal==NULL); N: T3 @7 V. O* y* d' o
hPal = (HPALETTE) GetStockObject(DEFAULT_PALETTE);, t( P; P3 b. J" R, W0 ^1 F5 h+ q( K
" w- y4 p4 r& C8 Z //获取位图信息
7 `1 a+ J o V( U# { D* ` bitmap.GetObject(sizeof(bm),(LPSTR)&bm);+ Y4 m$ B6 M4 b; x; |5 M( Y; E
: n) g9 M6 a6 A2 h8 z7 x$ V //初始化位图信息头
3 d4 F8 e5 ]( n T bi.biSize = sizeof(BITMAPINFOHEADER);! i) w0 o5 {3 _( b
bi.biWidth = bm.bmWidth; K, ]( H3 e" L+ C5 {4 T7 V. g
bi.biHeight = bm.bmHeight;
. Z2 g$ ^ L6 Q0 ?% ] bi.biPlanes = 1;2 ^/ w# B' Q4 Q n0 U
bi.biBitCount = (unsigned short)(bm.bmPlanes * bm.bmBitsPixel) ;
# N5 a, M# c' t) z. D/ m" K bi.biCompression = dwCompression;6 C0 {3 f$ e; i) L' b) j
bi.biSizeImage = 0;: d% {. H1 s! s2 }) ` {, K$ ]
bi.biXPelsPerMeter = 0;
& a0 _$ {8 h* H" b, N5 x bi.biYPelsPerMeter = 0;
, ~: l, F' t* Z- q+ F' U bi.biClrUsed = 0;
# H3 G/ r! D: B9 s- C9 B bi.biClrImportant = 0;2 f. a5 C# j# ~$ C: N
% F! B" M: T" p- M; B% e7 T# w //计算信息头及颜色表大小; ~3 U7 C4 [: \/ P( h* ~
int nColors = 0;
# F: K1 |2 |( G* z3 U if(bi.biBitCount <= 8); A v9 l+ |$ F
{0 Y# b$ x. }( ?, J: N/ P
nColors = (1 << bi.biBitCount);+ ]/ d {$ ]; z- ]
}" c, T: o- ^. q1 x4 L4 m
dwLen = bi.biSize + nColors * sizeof(RGBQUAD);- s3 @6 H- R/ A+ m7 e! `
# r0 R% c' P3 @7 F/ x4 C hDC = ::GetDC(NULL);
; L' o8 G' d1 @* j ^) ~, u2 ]3 p hPal = SelectPalette(hDC,hPal,FALSE);3 k2 b, q$ |( q) z6 a
RealizePalette(hDC);6 `8 u- x+ u% D4 I V' H
4 `+ W, Y% F+ z/ `4 {% P4 \ //为信息头及颜色表分配内存
/ y1 [ [6 s {9 e; |% U9 Q/ ?7 \ hDIB = GlobalAlloc(GMEM_FIXED,dwLen);
/ q/ P/ {4 z" q0 V' x0 N6 ^ if (!hDIB){4 ~" o. Q! Q3 W% r. E& L& _
SelectPalette(hDC,hPal,FALSE);: G3 v4 Y0 _7 b( ]4 J% P
::ReleaseDC(NULL,hDC);
- v- t9 R0 S! n! k% s: b return NULL;
8 [& O- |# `# w# W, Z" W' @/ u }
7 j* ?) ]" Y3 b8 p) r o, M8 |( x: s8 m" a
lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDIB);7 u! S4 m" Y+ l" _6 ~9 c& y
*lpbi = bi;$ |& ?, ^( z, ]4 T
6 B9 Z i( J1 K/ s //调用 GetDIBits 计算图像大小' h5 z! {( \" ]$ X4 S5 [
GetDIBits(hDC, (HBITMAP)bitmap.GetSafeHandle(), 0L, (DWORD)bi.biHeight,3 K9 Q# w5 ~% ~* L, {" O$ }9 h
(LPBYTE)NULL, (LPBITMAPINFO)lpbi, (DWORD)DIB_RGB_COLORS);% `( m7 P+ t# x' }, H9 T4 q
' p7 n! k" w6 |( E# N bi = *lpbi;
' A6 k8 Y2 s6 O
+ S# p/ |# r/ L: z //图像的每一行都对齐(32bit)边界
3 l0 n/ w! O3 B6 e% D if (bi.biSizeImage == 0){
" E: G% D* H% q9 e: v/ f% j bi.biSizeImage = ((((bi.biWidth * bi.biBitCount) + 31) & ~31) / 8)
/ J5 n/ {' ]* R7 t, _5 p * bi.biHeight;
$ S, i9 A0 g# s if (dwCompression != BI_RGB)
e, \, K" v+ y0 g bi.biSizeImage = (bi.biSizeImage * 3) / 2;
+ v) ]5 X0 K g5 j+ r- f }; x/ u2 x0 O9 p) A3 o: U# T
//重新分配内存大小,以便放下所有数据& m) T8 @+ y' ~1 i; `
dwLen += bi.biSizeImage;
/ P' z# u, M8 E handle = GlobalReAlloc(hDIB, dwLen, GMEM_MOVEABLE) ;
, s8 K w8 X# G {$ a: m" @+ m: y+ R if (handle != NULL)) i8 B; o- V0 x3 s- ?2 d
hDIB = handle;
- a7 R/ C- c) z$ n; A+ }; n, `& O N& i else" ]" c: v% p# K1 l# G4 {; R8 x% g
{
; e3 K8 S' ?/ K/ B! p( @4 W1 H5 g GlobalFree(hDIB);
0 `7 y! z- m2 h
7 }* z- ]: b* y5 b7 S& S //重选原始调色板: ^8 S1 P) W! S4 P1 z- `
SelectPalette(hDC,hPal,FALSE);4 f) ~$ I, A" O A: |+ e, w
::ReleaseDC(NULL,hDC);
: c3 Y5 Z) r0 x1 D# W! F return NULL;9 U, g0 d& [- S0 W
}
7 o% A y( k8 j; R //获取位图数据
! C) s, z0 R$ g' L/ d8 v lpbi = (LPBITMAPINFOHEADER)hDIB;. A1 z l" w6 S% L
//最终获得的DIB( P8 `: [) t" v7 p) \
BOOL bGotBits = GetDIBits( hDC, (HBITMAP)bitmap.GetSafeHandle(),/ N6 E3 P( h( T3 X, }
0L, //扫描行起始处
5 j% Z, t. N8 W5 W) c (DWORD)bi.biHeight, //扫描行数
! {( q1 P7 _0 y) ?/ m1 Y (LPBYTE)lpbi //位图数据地址: d4 G. v6 g& q n V# `% T0 a9 l
+ (bi.biSize + nColors * sizeof(RGBQUAD)),1 b/ t$ a( `& d* q5 k, G
(LPBITMAPINFO)lpbi, //位图信息地址, t$ L2 o: w6 f
(DWORD)DIB_RGB_COLORS); //颜色板使用RGB
( T' j' L5 H7 p0 S% M if( !bGotBits )
8 B' O, Q( U- A' r5 i/ u {
& W0 ^4 f% X- i ^2 J# S GlobalFree(hDIB);
$ W$ y- R! ^9 f% \0 { SelectPalette(hDC,hPal,FALSE);# a4 P% j7 l- V+ ~+ Z5 o. ~$ ]
::ReleaseDC(NULL,hDC);/ \5 K' Y- w$ j& i1 V
return NULL;
5 i" |# P$ ~( V9 }6 p( k }! n X; y+ t; i
SelectPalette(hDC,hPal,FALSE);
* ~0 W4 [( U- U2 l4 e$ G ::ReleaseDC(NULL,hDC);
+ ?; j( u9 E7 W. T return hDIB;4 N. J) l% M p5 n8 c
}
9 F& U' R) n& t8 H
% d p+ S3 d. ^
) T0 _9 l/ T1 ^' L( m//********************************************************************************
# R7 W1 M' f% A9 t8 U//* 名称:SaveBitmapToFile( S5 _8 C) I2 b0 x! D% c6 h
//* 修改:徐景周(jingzhou_xu@163.net)! t8 a5 q0 Z- \' F$ A
//* 功能:保存为位图文件! o( l3 N# I" E" y) @" i) L
//********************************************************************************/ ~1 U; f; G a- I* p3 C& k2 G
BOOL CScreenSnapDlg::SaveBitmapToFile(HBITMAP hBitmap , CString lpFileName)
4 _+ a* h& w4 m{
0 v, B! Y3 {) l1 o9 C5 o* q' f8 F/ \5 O HDC hDC; //设备描述表 2 J: f2 S: q# W2 o( M
int iBits; //当前显示分辨率下每个像素所占字节数8 ~& V5 U) `* l
WORD wBitCount; //位图中每个像素所占字节数
3 ^1 _# D! [! g! e0 w 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; U; k. ]& `' Y% f/ p. ]! I7 o& \$ k1 @
dwBmBitsSize,, |4 e& A/ ]8 p
dwDIBSize, dwWritten;' N2 N1 i2 e$ e2 \* D/ ~- J" o) @7 l( g
BITMAP Bitmap; 7 p7 p3 S4 }7 t! M
BITMAPFILEHEADER bmfHdr; //位图属性结构 2 H% ?: P, w" ^6 Z( b
BITMAPINFOHEADER bi; //位图文件头结构 $ E( O: n4 ]) [( L u" e# q m
LPBITMAPINFOHEADER lpbi; //位图信息头结构
0 \& t6 Z* B! i5 j& V* V+ \( W) X, T: \, E8 V( K" o+ b! Q
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8 Q( i5 j6 w. D: l5 w
$ J+ {" \- X% T# B4 _: q) D
$ B0 h Y/ z' U9 H8 m! b //计算位图文件每个像素所占字节数% @* h9 o9 @4 Y' p! @* Q5 R
hDC = CreateDC("DISPLAY",NULL,NULL,NULL);
" J/ C4 \* V( m" n; S' A iBits = GetDeviceCaps(hDC, BITSPIXEL) *
& G! Z5 c9 f: y: c6 G( ], C* c+ i GetDeviceCaps(hDC, PLANES);
' Q# G( m0 x/ i( l/ P1 o DeleteDC(hDC); d z$ N. Q: w: M7 { q8 i
if (iBits <= 1)3 l B# ]$ u. N: R) K/ Z
wBitCount = 1;8 i' X! B! f/ u/ L9 w8 F. m$ a
else if (iBits <= 4)
0 _8 d, u/ F7 m7 o wBitCount = 4;
, N# y3 t! t- L else if (iBits <= 8)
5 r& q$ c6 u; J wBitCount = 8;5 ^/ M- ^. U4 I5 g. Q
else if (iBits <= 24)
+ {! t2 O1 n2 s) F& ` l0 H wBitCount = 24;
/ w3 L3 v& \8 u. H% l$ G9 Y7 k% p( }, ]/ ^
//计算调色板大小: J8 g4 I$ g, b/ [6 G
if (wBitCount <= 8)8 Z, Z0 f( v4 u& S, Q$ ^0 ~
dwPaletteSize = (1 << wBitCount) *sizeof(RGBQUAD);) l) v% J, a4 M# b1 a- q5 @( t
% v/ O [0 |% D5 S2 K1 x //设置位图信息头结构
1 @+ y4 f" H" e! f+ l! Z GetObject(hBitmap, sizeof(BITMAP), (LPSTR)&Bitmap);6 d R, l. N3 ?$ n& d. R* ^# I
bi.biSize = sizeof(BITMAPINFOHEADER);
! T: e- `) v. z- ]& g bi.biWidth = Bitmap.bmWidth;
& ]" s5 ?! ?- ?: Z9 p bi.biHeight = Bitmap.bmHeight;: Y$ Y% V3 w h, d! m/ U: @* s" v
bi.biPlanes = 1;
9 ]$ ]+ S5 ?# w' D4 | bi.biBitCount = wBitCount;5 w# B5 R C n( e: A2 {. e" |
bi.biCompression = BI_RGB;
+ g# r+ y0 Z# J! W4 E4 D* E [2 P bi.biSizeImage = 0;' B1 h) z, r. F6 h
bi.biXPelsPerMeter = 0;
: ^4 N' f5 P" ~4 L bi.biYPelsPerMeter = 0;4 |; v, f1 a) Q% l: J0 t5 l
bi.biClrUsed = 0;
0 _( t2 q% s+ U0 Q bi.biClrImportant = 0;
6 F- q M& ^1 ]0 v( D dwBmBitsSize = ((Bitmap.bmWidth *
$ f6 d9 I- X+ ^" ^- ^, B wBitCount+31)/32)* 4
5 W1 ^$ D2 T4 R" s1 H, d# @ *Bitmap.bmHeight ;. W$ P2 r1 T; y! H4 N
% L) \% n( Y0 o/ L+ R+ \1 b1 R //为位图内容分配内存& q9 K3 I0 T4 E
hDib = GlobalAlloc(GHND,dwBmBitsSize+
# G% H n# A% |, f& L( K dwPaletteSize+sizeof(BITMAPINFOHEADER));
! b4 _ W# d* M* ] lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDib);
" u) _ S t' q *lpbi = bi;
/ R* c# {$ `. P( S3 ]9 z
! y" K) _; D% @ // 处理调色板
+ D p* h; ^# x hPal = GetStockObject(DEFAULT_PALETTE);: K$ |) {" {& w9 @4 q8 y! Y
if (hPal)
7 i) y& Q4 G. |) G {1 u; X2 u; p! \% c8 X: I$ L
hDC = ::GetDC(NULL);/ B' g2 O9 M% B* u' a3 R3 ?( m! R9 E6 P) g
hOldPal = SelectPalette(hDC, (HPALETTE)hPal, FALSE);2 `' Q7 Y. N1 k5 j8 \: T% Q
RealizePalette(hDC);
8 a$ C: ?1 I- f2 a. `" I% a }7 h1 @. s$ m- P* [' q
% |2 G' J) S! ]- ?
// 获取该调色板下新的像素值# A1 r2 @! X K. [0 ~( ^
GetDIBits(hDC, hBitmap, 0, (UINT) Bitmap.bmHeight,: S9 v$ D/ `2 D' z( r8 X1 i0 w% k
(LPSTR)lpbi + sizeof(BITMAPINFOHEADER)+dwPaletteSize,
1 D+ K4 ~# J5 M (LPBITMAPINFO)lpbi, DIB_RGB_COLORS);
/ g( X( F: h4 B# @ A; u/ ?7 j) q1 m
. W! `% S5 Z- P/ }' [ //恢复调色板 ; g' W/ N/ V; X8 A9 `
if (hOldPal), R$ \: U: z E t6 k) G8 D
{$ R J( n! O D: ^8 w4 F, v
SelectPalette(hDC, (HPALETTE)hOldPal, TRUE);: ^/ A/ B. U+ i# p2 ]
RealizePalette(hDC);4 B2 b8 F+ s1 C7 b6 Z! Y- e* w
::ReleaseDC(NULL, hDC);, U/ H9 O5 C' t1 s3 [
}
, U' L' e d7 t1 @' c; ?; I1 }6 C8 f7 `- O) {) T& r( _
//创建位图文件 2 ?$ n) K0 \ v* u% e* w. D
fh = CreateFile(lpFileName, GENERIC_WRITE, 0 Q# R' U- O# c; w/ I3 }
0, NULL, CREATE_ALWAYS,, V2 i2 K; x- ~& |# l( u2 {
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, NULL);
, [) X* k, f8 j$ M5 x y if (fh == INVALID_HANDLE_VALUE)2 a$ n4 N: o/ }; }6 X
return FALSE;( o" J. o* y4 ^
* r9 Q6 g+ }" ]( } ]$ }6 {
// 设置位图文件头; K( Y$ k ~+ R$ e5 x7 E5 T
bmfHdr.bfType = 0x4D42; // "BM"8 S0 n* _ C( C! f$ R( N ?
dwDIBSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + dwPaletteSize + dwBmBitsSize;
) l% R* P0 A: T( A3 N# M7 n6 R1 T, t$ n bmfHdr.bfSize = dwDIBSize;
% n. b& v0 x0 X/ Q4 i0 j bmfHdr.bfReserved1 = 0;( X, k! A- ~ @' w+ U( o9 d
bmfHdr.bfReserved2 = 0;8 n# }, D8 ^1 F, k; H4 f" z
bmfHdr.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) . \4 z- s1 a& a2 o
+ (DWORD)sizeof(BITMAPINFOHEADER)
8 v% T% I# m4 w3 Q6 y8 u + dwPaletteSize;
% ]8 l( h/ V h' m. w# m/ C4 w; m6 B# E$ T
# o |" h* o7 E% M" z9 T // 写入位图文件头
3 Q# J9 ~# \( Z) }8 w; I) [% p) g WriteFile(fh, (LPSTR)&bmfHdr, sizeof
" a" l9 I/ K' ?6 e' j! Y- A- H( ` (BITMAPFILEHEADER), &dwWritten, NULL);
1 [# r& E4 V# z% l* b/ Z
$ n# A0 P1 u% Y& Y5 u& c. c // 写入位图文件其余内容
* ^# O1 @( o' B WriteFile(fh, (LPSTR)lpbi, dwDIBSize, ( V0 d8 p4 |& q* M
&dwWritten, NULL);1 Y( ]3 W; I' q" ?1 @$ o
' x9 U3 i* Z2 f4 k5 |
//消除内存分配 0 n& P# C ?4 b% }/ X0 E& U
GlobalUnlock(hDib);7 N% B$ v, J; c4 J) z4 l
GlobalFree(hDib);
; W2 P( @9 p& \7 C CloseHandle(fh);
, L- m* S0 j$ R N) I# K' ~& R9 ^7 A+ \+ ~- u
return TRUE;
+ A+ m- }0 R. t, V' {5 g! b}
/ |8 Q* O+ @- A, C
. H% g; L; {. [" n; _* A/ {, O8 v# j; |
20. 如何获取局域网上计算机名及它们的IP地址
1 m4 W S1 ?, W6 @; c$ a' T9 }9 {$ P: l/ V! N, i4 v
l 连接ws2_32.lib和 mpr.lib库; r, j; \, C1 [, N9 B# _# }
9 b+ W" k# ^7 S# w+ ]- l8 }l #include winsock2.h
# q6 o5 }% m/ Q* Q a+ U! ]: @! k/ @3 i v
CString strTemp;
1 |& G$ o; e- D; D; wstruct hostent *host;
& \. \. a8 h/ F. \: m6 S8 L, v
5 R$ T) K! I1 y) c! F6 Rstruct in_addr *ptr; // 检索IP地址
6 z8 k6 z5 C* l4 ~DWORD dwScope = RESOURCE_CONTEXT;" P9 C$ I j2 k: A
NETRESOURCE *NetResource = NULL;
, ~3 H1 a" J- YHANDLE hEnum;
! K; l& V( `# G2 h0 }2 v; T: f* TWNetOpenEnum( dwScope, NULL, NULL, ; g# A7 ]( f+ m2 B- x0 L! |" [
NULL, &hEnum );
) }6 _/ g; `& [% _5 { ]$ C
3 v. Y" t' ?( E1 g( ~& ]- EWSADATA wsaData;
9 ^* i& r6 k9 f% J2 uWSAStartup(MAKEWORD(1,1),&wsaData);
5 o& ]9 S# v3 q* c5 I' x
! f6 x& R, f! \9 L* C2 k4 hif ( hEnum )
" Z1 U8 @$ V4 |+ c. X{
$ y6 ` L) ` \, w4 @, n, D DWORD Count = 0xFFFFFFFF;- z) ^$ K# ?# V, `) k) f
DWORD BufferSize = 2048;8 E) Q1 A' u7 g/ n: h0 ^
LPVOID Buffer = new char[2048];+ J9 F+ ^8 F: G4 b7 h' A! Q
WNetEnumResource( hEnum, &Count, : v" Q N3 K7 d
Buffer, &BufferSize );% U6 L+ P8 s0 Z% w0 a4 _9 ~7 f$ A! [9 j
NetResource = (NETRESOURCE*)Buffer;
, {* V% W8 H5 Z* ]- j2 b, t0 o' ]5 U5 m
char szHostName[200];5 q5 j" ]" v4 ?2 F* Q: E; @
unsigned int i;1 t0 g3 P9 l0 g2 l& L4 f7 R# [6 e
/ e2 E3 P# T% f6 k
for ( i = 0;
: E, m: v4 s% A6 z( o+ b' ? i < BufferSize/sizeof(NETRESOURCE);
, e; J& s" Z( i& f2 c i++, NetResource++ )
( [( u1 ?; k% L# B* O; D {
+ m* O/ l4 I4 }, `0 X& q' m- l if ( NetResource->dwUsage == : l9 z5 X" X& Q
RESOURCEUSAGE_CONTAINER && / s# Z, H4 E8 t q5 A L2 ~5 Z N& M% L. `
NetResource->dwType ==
- D+ |* N6 c* |, c2 M1 i9 U RESOURCETYPE_ANY )
6 p c5 A1 g- C- o5 x7 w1 U {
2 ~# a8 H$ c5 A5 |5 d' X7 L( S if ( NetResource->lpRemoteName )8 g+ k9 U# w/ c C
{+ W' [ U" C0 c3 b/ O
CString strFullName =
7 O" I2 ^: T2 ~9 E2 Y9 l; g NetResource->lpRemoteName;
6 G& C4 {7 A1 |* c if ( 0 ==
) n; c' Y9 q. r4 D2 U2 B strFullName.Left(2).Compare("\\\\") ) p j$ ^9 _1 L) ^; V9 ]( n
strFullName = ( @ g# K. I, }6 j; E4 O2 u
strFullName.Right(8 k! G# f: \3 J
strFullName.GetLength()-2); i+ ` E7 Y$ }! E4 x3 s" x
, E6 ?) j7 [# G
gethostname( szHostName, ! M: Q2 Q9 r1 |# ^
strlen( szHostName ) );
( I& y) a* V' @8 f2 L host = gethostbyname(strFullName);; y- q6 _! K+ _6 O3 E- y
" e8 k$ ~! g; v9 f# g if(host == NULL) continue; * m D" O# t# G8 d( N9 m, N
ptr = (struct in_addr *) - H1 ~! \4 y y/ J; Z# c
host->h_addr_list[0]; 0 X; { T5 Q( e! V
9 |! e* }; b: z+ g
// =. 分隔开IP:211.40.35.76. # Z* P' ?% j$ B* H
int a = ptr->S_un.S_un_b.s_b1; // 211
; s) @# |8 S" H8 s' Q% g int b = ptr->S_un.S_un_b.s_b2; // 40# M: @& z# b4 a6 i+ V
int c = ptr->S_un.S_un_b.s_b3; // 35/ ~, y5 E9 f5 p+ E+ \
int d = ptr->S_un.S_un_b.s_b4; // 76/ z8 G; C3 C- |, G5 f+ a2 M2 s
% o e$ H R4 | strTemp.Format("%s --> %d.%d.%d.%d",
; Q" a5 {7 @: @% h5 X! S strFullName,a,b,c,d);2 Y) u: ^& F/ U& W# `
AfxMessageBox(strTemp); @% }) n0 Y0 |, H+ ~8 D
}
3 j4 `5 s; l3 E* l1 U/ M }+ ?* e. @6 |. P5 h, x' w
}
& H; x! E. }) S* |, A$ J2 L8 t0 H. H: n
delete Buffer;
8 n8 T" j/ a2 J7 ]" V: m WNetCloseEnum( hEnum ); 7 W1 _( s# ]6 w: T, G- c
}
8 h; I: s) K% A: ^2 p$ ^5 ~/ `/ B; z
WSACleanup(); |
|