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一直以来都没有用过WMI, 都是用的PDH来获取系统信息.感觉两者很些相似,都是类似于性能数据库,基本的一些什么硬件软件信息都可以比较全面的获得.只是用VC来调用相对比较繁杂,用VB和C#就方便多了.这些天到MSDN上找了些资料,总算大致搞清了一些编程思路.对于那些很想知道怎么获取诸如CPUID,硬盘ID,BIOS信息以及主板信息的人来说应该有些帮助吧.试着用MSDN的例子乱写了一通,以下是通过WMI获取BIOS的例子,不对之处还请指正 ^_^:
8 h8 Z: ~7 O) h6 f" R5 B( U --------------------------------------------------------------------------------
! A! m4 _- Z7 l1 y #define _WIN32_DCOM " R9 n+ O/ i6 ?' d
#include <iostream>
/ r$ O9 A: z2 T: f+ \4 Z% h. Q3 i using namespace std ;
$ @4 T3 I5 l! K. o #include <windows.h> , V" [, z# _4 b# X0 ?1 x
#include <comdef.h>
3 G: E4 ?& \/ m0 Q9 _: N #include <wbemcli.h> 2 F/ F$ O$ Y" L9 I+ K2 }0 N/ G! o
+ V; j6 `7 t, m% X' m #pragma comment(lib, "Wbemuuid") 0 }0 {0 D$ p0 @8 v* l0 c9 R+ V
e% h8 P/ N1 W" m) v
int main(int argc,char**argv)
: p- U/ F& y& W% r! ?% b {
& T% I, d+ y. W4 v' G: M u9 h HRESULT hres ;
\5 y) h5 G2 T9 g e 6 f4 I% Q `/ n
// Initialize COM. 8 R: W/ A; V# k" D( |1 K
hres=CoInitializeEx(0,COINIT_MULTITHREADED); / Z1 |4 S/ p1 u c4 F; P
if(FAILED(hres))
0 {: q+ d0 g+ \9 E9 V4 a. L { ) i. {0 i4 N1 X: v8 N) W
cout<<"Failed to initialize COM library. Error code = 0x" + d$ k* L' G/ U4 K2 E7 G) B2 @
<<hex<<hres<<endl ;
. Y5 q& }2 w# i return 1 ; 1 }* z1 K& a/ G' |$ A G
// Program has failed.
8 h" m! t5 F$ E; i8 c } $ }) P1 z# Q7 z6 {
5 ~1 Y" V, f) C. C% r9 J8 `* h5 y2 z& I6 O
// Initialize ( v/ V* w! w% |, z+ l
hres=CoInitializeSecurity( 5 _9 M- e/ `8 k$ E7 t
NULL,-1,NULL,NULL,RPC_C_AUTHN_LEVEL_DEFAULT, & L& G* K& q7 d7 H5 z2 n
RPC_C_IMP_LEVEL_IMPERSONATE,NULL,EOAC_NONE,NULL);
+ X/ {% K% e# D E
2 m. G. z, _9 n% i* x + H' S$ F* f I& Q& v, u
if(FAILED(hres)) * ?& [! [" T- ], n! u5 r" H
{
; g4 W- X' F/ s, q! t: ~$ l- x cout<<"Failed to initialize security. Error code = 0x"
/ h8 p3 \+ S$ a, h4 W9 f <<hex<<hres<<endl ; $ z1 e# L9 T8 z; \( i
CoUninitialize(); 7 r! J8 O, `) g2 ?/ w4 b3 g
return 1 ;
! X9 t: `; R- C+ f% `3 ] // Program has failed.
: {$ g/ N, K2 ^5 n }
' t, B4 P- V1 Y) s, U* V" |
6 f( f' }* D9 K' ^/ j. m // Obtain the initial locator to Windows Management on a particular host computer. ! Q% b1 q9 C! s1 T0 `/ D' c# O
IWbemLocator*pLoc=0 ;
0 D# J l/ C% M% ?4 z4 G2 T 5 d+ n+ H; f( h
hres=CoCreateInstance(CLSID_WbemLocator,0,CLSCTX_INPROC_SERVER,
) B; ~: z, h& ^6 Q/ @3 e IID_IWbemLocator,(LPVOID*)&pLoc); ' V' ~0 _9 {- V
2 A0 R5 u6 R: G# Z' H" t% Y
if(FAILED(hres))
2 q9 \7 u Z% J( ~; N7 n {
/ g. V, | H% L/ N/ j$ F3 U cout<<"Failed to create IWbemLocator object. Err code = 0x"
$ U9 c' y9 V. F" W* ?/ ~" Z <<hex<<hres<<endl ;
; a! ?9 W1 `' b+ k+ s CoUninitialize(); 8 S# v7 H. H0 U, Q# K' w( y0 b
return 1 ;
0 g( h8 j2 V% e+ i // Program has failed. 5 T0 ~1 \# V) N- H, A
} 0 p3 f/ j+ k. d, n
* D% ]- w' r1 l+ K) L" W' a3 o IWbemServices*pSvc=0 ;
1 Q: S( a# x- e& [ ! b5 f" k/ a; O
// Connect to the rootcimv2 namespace with the current user and obtain pointer pSvc
# {' F- A; Z$ G: s I1 ^" j7 `. S // to make IWbemServices calls. % m% G! V4 S# n- L8 t- S1 H
+ d% v. s3 T/ X+ a5 ] hres=pLoc->ConnectServer(_bstr_t(L"ROOT\CIMV2"), ; ?0 K' k4 Q' R6 I: o6 i4 y5 v
NULL,NULL,0,NULL,0,0,&pSvc); 7 j- R* E9 ?( b, `
6 r1 G6 \7 [( v; x, d% Z* o if(FAILED(hres))
, e9 I" r$ [9 |1 Y { ) v% @ n( l8 j+ c6 G" c& I% } Z
cout<<"Could not connect. Error code = 0x" : V, g! U) z0 w$ d+ N; b
<<hex<<hres<<endl ; 2 M: l, E8 Z( _ p0 g
pLoc->Release();
: V& ]" g( o: z CoUninitialize(); ( J# B) J& L6 v; {: L( c
return 1 ;
( ^/ D4 S/ O1 W // Program has failed.
+ N& _" C, B8 C% d7 x+ m1 K6 }) e4 l }
" W' P6 u7 J/ ~5 P, W% b, h5 K* j% ? 8 {+ l# \' V# \2 F
cout<<"Connected to WMI"<<endl ; 6 n4 l; Q: X+ C4 z/ |& H) M
6 l ]) j" d" m0 f$ r' l) w" q0 m
// Set the IWbemServices proxy so that impersonation of the user (client) occurs.
/ s- ^+ G7 H: _% b ]4 w hres=CoSetProxyBlanket(pSvc,RPC_C_AUTHN_WINNT,RPC_C_AUTHZ_NONE,NULL, ' j0 \1 u& ?" V( f3 y4 R/ b
RPC_C_AUTHN_LEVEL_CALL,RPC_C_IMP_LEVEL_IMPERSONATE,NULL,EOAC_NONE); ! u. n! t1 P" t; P R- i
/ w% {# ~/ f0 j0 F# x" c
if(FAILED(hres)) % w. @0 I$ }( B+ N2 |* ?% c& g
{ * o- r" c. u- `" Z) s: J
cout<<"Could not set proxy blanket. Error code = 0x" 9 z7 Y1 _0 p: b6 f& r0 \" R
<<hex<<hres<<endl ;
& A+ d8 O4 T, X, x, ]6 v8 Y pSvc->Release();
& y0 O r2 _7 d: ~! I pLoc->Release();
9 T6 f/ \/ [3 z9 U) W; r CoUninitialize();
" f$ p: w9 k9 q3 L return 1 ;
9 \) e1 O# U- [0 _ // Program has failed. % Z* O9 i0 c9 R* p0 X6 w* {0 k; z! g% e
}
! z( Q+ V. s2 l! F! n
& k. p& l* b C7 W' ` 3 I9 H) b/ z+ o) y( C7 R$ i
// Use the IWbemServices pointer to make requests of WMI.
# L n# k( a1 }; S // Make requests here: $ i6 \" y- l4 t
3 o: c4 m( Q1 R4 @ {8 l! ^ // For example, query for print queues that have more than 10 jobs 7 ?1 Y, a# H I6 }# N; \& |( P
IEnumWbemClassObject*pEnumerator=NULL ;
* p& Q) g% ~6 x y hres=pSvc->ExecQuery(
2 t* e* P3 s! X2 W% H# J* l( I3 Z bstr_t("WQL"),
& t- z& d/ ^* f4 |+ x- _9 } bstr_t("SELECT * from Win32_BIOS"), # A) f- b9 W& {- j R
WBEM_FLAG_FORWARD_ONLY|WBEM_FLAG_RETURN_IMMEDIATELY,
5 b" n1 S8 g9 G NULL,
7 g% m0 J7 a+ J! r( Q- U &pEnumerator);
# ?5 L. y7 T5 r R. N% P$ x( X ' j R6 h7 b' w0 Y# Q# E4 U
if(FAILED(hres)) 4 ~# J! N& G+ ]1 O9 J7 ^7 C" j
{ / G% \1 {( K5 q
cout<<"Query for print queues failed. Error code = 0x"
2 C) C' U4 D# {' y* R H! D <<hex<<hres<<endl ;
+ f* }( X: l) x pSvc->Release();
7 ^" O* D# e9 ~# ~; s8 j/ G pLoc->Release();
8 ` B( J0 o1 a, t! r% \ ~; l CoUninitialize(); ) P( X. o' x" F# G* p6 O+ n" d
return 1 ; / K4 D: j' m s) K( }
// Program has failed. # @( o& I' Z6 ]3 J" p1 O$ _
} # ^" |: Z' R* i! e
else 8 A$ }: |/ M' N
{
1 \; O# v+ w: _ IWbemClassObject*pInstance=NULL ;
; `3 J! `6 o- N" `# v ULONG dwCount ; ( g) i X6 E/ z8 V8 q
while(pEnumerator->Next( 6 l0 t2 x, Z5 y: @
WBEM_INFINITE,
- l& p9 H$ b; Q" i p$ [ 1, ; O. R% |6 Y. K. q! m5 b. e5 V9 ]
&pInstance,
* l/ L; ?; v8 u7 W- M% a &dwCount)==S_OK) # O1 d1 y; `" M7 P3 P6 p, n
{ 7 q$ |. K' X8 U1 O: H
SAFEARRAY*pvNames=NULL ; . u, d- q: d4 h+ J3 A
if(pInstance->GetNames(NULL,WBEM_FLAG_ALWAYS|WBEM_MASK_CONDITION_ORIGIN,NULL,&pvNames)==S_OK) 4 Z) o* N, l( R8 A5 i
{
" g" M$ y8 x/ e+ Z4 N long vbl,vbu ;
( d& Z: m [' l; a" P SafeArrayGetLBound(pvNames,1,&vbl);
! X2 ^# E! U* O( ? SafeArrayGetUBound(pvNames,1,&vbu); / L* A/ Q# P" i, w0 ]
for(long idx=vbl;idx<=vbu;idx++)
" N0 M/ ^/ |2 ^$ m% @ { ' t. v" h4 I# ?4 O9 o/ @; g
long aidx=idx ;
9 z U3 Q: d6 P wchar_t *wsName=0 ; ( E; R- {7 ~7 [3 o+ E6 D
VARIANT vValue ;
6 f8 m( d. @0 j+ A8 N8 } VariantInit(&vValue); * Q3 \/ P% _3 h. V n. o
3 Z! b" E, [. w; W# j! E' T SafeArrayGetElement(pvNames,&aidx,&wsName);
! A1 o- | _' E# G: a4 \ + S# t+ R/ t; a9 e/ P( t% v$ j
BSTR bs=SysAllocString(wsName);
. d) ]' `( ~: W' T7 w hres=pInstance->Get(bs,0,&vValue,NULL,0);
Z& A* C) p3 j' H SysFreeString(bs);
, X" u3 a/ v @$ s) e
8 |- {* P; } L4 h2 M9 f/ ?2 Y
" n. M4 o/ {/ Q: `/ z5 W" s1 F% f if(SUCCEEDED(hres)) % B, K1 g! `* P6 N. q
{
9 k* u* b* M) X char szANSIString[MAX_PATH];
( E: j- y( P1 | WideCharToMultiByte(CP_ACP,WC_COMPOSITECHECK,wsName,-1,
6 H4 Y3 y3 {; Z: O" ~1 | G! j( Z szANSIString,sizeof(szANSIString),NULL,NULL);
2 B1 S; j; b: J& f* U5 U 8 ~( G; m/ m- E7 _
cout<<szANSIString<<" : " ; ; m+ w5 Y7 c( e
switch(vValue.vt)
+ J( x& v0 ]) F) F6 y% m, U# G- z {
; x+ j! L9 f- z case VT_BSTR : + J( P0 ]& B- n" j! i5 K( F2 g6 r
wprintf(L"%s",V_BSTR(&vValue)); # Y* F4 o" n# A+ b& O
break ;
c3 `1 d( R9 ^/ f! Z( |, ^4 T case VT_I2 :
$ B) V' y, U" S. z wprintf(L"%d",V_I2(&vValue)); 3 n2 u& i) t. j+ X4 S* N3 O
break ;
5 n7 W8 O( D9 p: @+ e+ p( y* t case VT_I4 :
! j1 u7 s0 _- b/ w1 B& Y5 E wprintf(L"%d",V_I4(&vValue)); 8 s; ?6 t5 v w* `. F
break ;
; e8 B" T3 u- T0 p2 t! X9 L0 ~8 W case VT_BOOL :
. h8 E% l, I$ ]( G" Y4 a T- }0 O wprintf(L"%s",V_BOOL(&vValue)?L"TRUE" "FALSE"); 8 l3 X! d0 |+ W' M- [
break ; 7 }: V1 Q6 a/ ]$ n. j
default:
1 ]* l4 }6 W" J3 v4 R# H /*WCHAR tmp[100];
2 |0 B! i s, H! v9 J& x% G6 r* E wcscpy(tmp, V_BSTR(&vValue));
4 F. o8 v* y( K4 V/ | char tmp1[MAX_PATH];
/ k! o( J: ^( Q0 Y- F2 L, { WideCharToMultiByte(CP_ACP,WC_COMPOSITECHECK,tmp,-1,
9 \) S) p- j! T tmp1,sizeof(tmp1),NULL,NULL); / d' }' e3 D C6 W! T! {+ {) w
% |/ p: b1 V, x2 ?9 `7 A
cout<<tmp1;*/
* _% Y9 F L% ^* Y break; ) L% V# Z2 k& y& e
}
% V5 b( I* L" O8 X cout<<endl ; ) W/ j' v" K7 Q" s; J. v
}
8 p* X) K4 s& c1 E. g+ w7 W $ N/ \: ]) t8 V2 b6 [
SysFreeString(wsName);
/ W* \0 ?; P2 u- [) w2 u } 4 t3 G5 c; k3 R. ^6 O/ Z# ]. I5 |
q' C% I+ ~) w8 L
}
" A# n9 e" e0 I1 N7 U+ G else 0 w3 y! f+ ?& e1 @2 w
{ / X& c g% B: |- ]
cout<<"Query for print queues failed. Error code = 0x" # u7 \2 K/ V/ l8 w
<<hex<<hres<<endl ; $ Q4 m4 H) J0 V! C! H" x" p
pSvc->Release();
; k9 U2 a4 J1 h( N# s; K pLoc->Release(); % s& ~! g+ z( m. x6 l2 }, A" b
CoUninitialize(); ( d2 |- }, M# G6 D
return 1 ; 2 l8 C! Z& ]+ }# p1 E. Z) ~
// Program has failed.
6 N% U5 e8 B" ?) ?8 q } : ]" o, Q4 f+ }# h* [* T
if(pvNames)SafeArrayDestroy(pvNames);
- k) T. M: I% c9 j! H' f' l } . Y9 `3 t' R& j
if(pInstance)pInstance->Release(); & _ p4 h6 x3 h3 G5 L$ X9 N2 y
- A( A' ]0 N& t8 N# x: L
} # t4 A4 i2 {0 N# R5 p4 J
// Cleanup
8 M# c' o; o% t4 L, h9 Y# y // ======== 2 ^. k# W8 V0 Q
pEnumerator->Release(); * Z% e$ d0 d0 ]6 v( c
pSvc->Release();
! q9 r: n8 g1 z2 d9 a p9 P pLoc->Release();
$ O) Q, G# }* j# C CoUninitialize();
& _4 ]1 c' Z0 Y: ?7 E
) o' q% O) r2 [3 i7 R7 h" b return 0; 7 l; x6 D: U: D
// Program successfully completed.
, |/ N$ z% O& `2 U! d$ K5 `( Y }
# q- O1 D2 b2 k8 _' Z$ ^ //-----------------------------------
% l) N7 g+ s$ A1 c' I' i! ]
& W, P5 S8 d. I/ e4 y 对于怎么用BCB编, 感觉还容易一点,因为我在类型转换的时候碰到了一些问题,而在BCB中的Variant类做了比较好的封装, 具体代码可以 http://www.cppfans.com上找到.
8 H# i, D! v, S+ v4 Z+ R# z
! ~( ]; h/ l6 \; g1 v5 ` void GetWmiInfo(TStrings *lpList, WideString wsClass)
8 f2 c# Q |3 ^* T/ E$ m0 e { 4 D: J6 n0 r4 v
IWbemLocator *pWbemLocator = NULL; 1 k6 r- r/ t, D
if(CoCreateInstance(CLSID_WbemAdministrativeLocator, NULL, CLSCTX_INPROC_SERVER|CLSCTX_LOCAL_SERVER, IID_IUnknown, (void**)&pWbemLocator) == S_OK)
3 U$ i. O) T F) t- @ {
8 @# S" C4 B) \5 J& ^ IWbemServices *pWbemServices = NULL;
5 G9 e( Z2 [8 Q) \8 M+ r) z/ J WideString wsNamespace = (L"root\cimv2"); 4 E; E( N+ k( ~0 {, `% S0 a
if(pWbemLocator->ConnectServer(wsNamespace, NULL, NULL, NULL, 0, NULL, NULL, &pWbemServices) == S_OK) * G) J$ }& H8 z; p9 D# W8 E6 w
{ " h4 c( a* D* N8 k1 o
IEnumWbemClassObject *pEnumClassObject = NULL;
! e3 F! u7 R5 A WideString wsWQL=L"WQL", wsQuery=WideString(L"Select * from ")+wsClass;
. |- J3 }( q" [ O0 @5 i2 |* N" L if(pWbemServices->ExecQuery(wsWQL, wsQuery, WBEM_FLAG_RETURN_IMMEDIATELY,NULL, &pEnumClassObject) == S_OK) 2 D" M3 i2 P5 q9 z( B1 R7 c
{ 0 E1 U9 R6 ]. [' E0 I4 [6 _3 j
IWbemClassObject *pClassObject = NULL; - `7 E! e/ o2 D4 i s
ULONG uCount = 1, uReturned;
$ H: I" j/ g6 x2 N! s5 q if(pEnumClassObject->Reset() == S_OK) ; t2 b/ r7 m0 V6 u7 i: y- ~
{
4 E: E7 A& n% o5 v; z, L int iEnumIdx = 0;
/ A2 p' q* W% S- {7 M7 k while(pEnumClassObject->Next(WBEM_INFINITE, uCount, &pClassObject, &uReturned) == S_OK) ) X; [8 c* E2 T
{ # C2 W" G% P. C! l0 g
lpList->Add("---------------- ["+IntToStr(iEnumIdx)+"] -----------------"); 7 K+ @1 A# l' g
5 F) L; o9 Y, l, {' u
SAFEARRAY *pvNames = NULL;
$ y; ?) w6 V- |, L* R if(pClassObject->GetNames(NULL, WBEM_FLAG_ALWAYS | WBEM_MASK_CONDITION_ORIGIN, NULL, &pvNames) == S_OK)
) ]# `2 H+ ]6 P3 ~2 w5 s { 6 c9 F$ c: z% C3 ~: @" ~# p |( ?
long vbl, vbu; 9 }) X% P% h4 q7 h3 H* V
SafeArrayGetLBound(pvNames, 1, &vbl); . i" C. T0 k) K4 j
SafeArrayGetUBound(pvNames, 1, &vbu); : t; u0 Q H8 _/ t9 Q; O
for(long idx=vbl; idx<=vbu; idx++) 7 @) A, e% j& N# i( p
{ |
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