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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 ^_^:
' @ a# R8 W* u$ \ --------------------------------------------------------------------------------
5 O, M+ R: s z #define _WIN32_DCOM * j3 l+ r* p( B5 q2 F" ?+ y8 }& }
#include <iostream> : k, E9 \9 l8 ]0 T, l0 v7 ~
using namespace std ; ( I$ z) Q! t" e( k7 H
#include <windows.h>
: l( m/ k2 o8 W! x6 w #include <comdef.h> 0 r& }9 ]6 v4 J3 M( ?; Y
#include <wbemcli.h> 9 i% d6 h* ]2 d+ z
7 T% H4 J5 T% w
#pragma comment(lib, "Wbemuuid") 0 r' ]2 i9 X4 R8 W
8 ?' u& }) ]5 w2 ^ int main(int argc,char**argv)
4 ~' [ `: N- x# B5 D8 P {
" O0 a$ \! _4 `9 D/ s HRESULT hres ; % Y, }5 f% t1 E" w* `, S
4 i7 J; u4 J6 M. t( S/ _# |
// Initialize COM.
6 g" c; @0 q! c1 {2 } hres=CoInitializeEx(0,COINIT_MULTITHREADED); + R4 y& v3 b7 k* U9 m, s
if(FAILED(hres)) , P/ U! |9 O8 N9 ^! I2 Q
{ & J4 {' U7 \6 v, p
cout<<"Failed to initialize COM library. Error code = 0x"
. H& M2 \5 {5 n" q1 _ <<hex<<hres<<endl ;
% _1 k9 T5 j5 Z, `; M6 x, I" z return 1 ;
. [9 @; H0 q& L" g9 U3 s8 Q // Program has failed. ' z H& p; S: M. C W) v0 l" O
} Y. {. X( f& i4 c
! {; S0 X) w- s4 v# Z // Initialize ! c$ E% d0 w2 `2 V% S u- Z+ w
hres=CoInitializeSecurity( 0 p6 S+ d) t7 ]: _! z1 ?* E$ _3 f
NULL,-1,NULL,NULL,RPC_C_AUTHN_LEVEL_DEFAULT, # O0 ^9 I. t' H' I. l
RPC_C_IMP_LEVEL_IMPERSONATE,NULL,EOAC_NONE,NULL);
' a4 N7 G1 m: p. G$ v0 q: ~, k& }
# o& g9 T! G& w0 q 3 e5 p1 S B9 ?+ C7 \% K9 a
if(FAILED(hres)) " j( w: @" @, W
{ 6 x! f8 r3 b* t% K5 g& @
cout<<"Failed to initialize security. Error code = 0x" 4 w; Q9 W2 G: c2 j1 V' v
<<hex<<hres<<endl ; ) A& J1 m. X5 A4 b
CoUninitialize();
5 d* w7 k8 u# d" T, z |0 o return 1 ;
) D) y2 E/ W! I, E1 C# \& ~& ?' n // Program has failed.
) L# n* ^! r3 b }
& l: s* n( x- t1 A4 X0 d * ]. p; k9 h% a2 Z1 |
// Obtain the initial locator to Windows Management on a particular host computer.
2 E) i3 i4 C! f8 a, f& V IWbemLocator*pLoc=0 ;
$ Z3 O( d- \' w 2 D2 D* R. i9 P/ n" w. U$ J% L! B
hres=CoCreateInstance(CLSID_WbemLocator,0,CLSCTX_INPROC_SERVER, - G6 b' g9 r/ `
IID_IWbemLocator,(LPVOID*)&pLoc); ; Z+ U& q4 I# g& \4 }" b" Q6 u
( \2 H9 j7 b7 v$ j' _ e if(FAILED(hres))
5 h- v4 S0 K/ [ {
1 J& J9 I& Y' ~/ G% L, O2 ^ cout<<"Failed to create IWbemLocator object. Err code = 0x"
( C* U; I& j/ x* B <<hex<<hres<<endl ; 7 P* B2 S+ M; w% B q" e+ d
CoUninitialize();
8 l( e& ^- c% p0 Q) |- h2 w return 1 ;
: @- `% K1 j8 W P; \/ _ // Program has failed.
' s2 L4 H' P# U# i6 F6 D } - f9 j9 V% }: |
3 X+ }+ M8 V8 V) g$ n* T* d IWbemServices*pSvc=0 ;
9 w% x# A& ?5 [! Z! M, u4 @
# S1 l& j4 v/ t3 w // Connect to the rootcimv2 namespace with the current user and obtain pointer pSvc ( t6 R+ a( n2 }0 Z' Y8 S
// to make IWbemServices calls.
p6 l8 z. Y* T6 X ' C i+ v( C! `5 S6 f0 ]2 E
hres=pLoc->ConnectServer(_bstr_t(L"ROOT\CIMV2"),
4 g& J1 t2 \0 ~$ t0 N NULL,NULL,0,NULL,0,0,&pSvc); 8 g8 H% k" P% \, V3 ?/ g7 T
" e8 q2 R+ d) }) [ if(FAILED(hres))
7 K- Q2 ^; Z* {9 [( N$ i/ M {
5 r; S8 h- X7 _9 N) M) ^. X cout<<"Could not connect. Error code = 0x" ' i' X0 q. _6 r4 }7 e$ Y- v+ g- p
<<hex<<hres<<endl ; 0 z% Z$ R6 x* o7 k# V+ o1 S, u/ V$ S- a
pLoc->Release(); " k" N3 K; M- }% b" w V N7 j
CoUninitialize(); # x# Z6 x+ N4 c$ x- H
return 1 ;
' O2 e2 A" V& o5 v4 G; F' V // Program has failed.
# y9 p4 \2 k8 P- E/ j" H# A4 i } 4 t8 y, x8 u% j' R$ A8 ^5 ^9 W/ O
2 q1 v& u/ x7 \, Z3 J
cout<<"Connected to WMI"<<endl ; 2 I0 ^. w7 m* s
/ r c4 Z6 ^2 K6 K5 B2 H // Set the IWbemServices proxy so that impersonation of the user (client) occurs.
4 ?0 f5 _/ ?! W hres=CoSetProxyBlanket(pSvc,RPC_C_AUTHN_WINNT,RPC_C_AUTHZ_NONE,NULL, 8 I2 j( H9 |" s/ L9 v' |
RPC_C_AUTHN_LEVEL_CALL,RPC_C_IMP_LEVEL_IMPERSONATE,NULL,EOAC_NONE);
7 r9 l0 W/ _( p; k" [& |6 \
$ Y! z3 c( q$ B2 T& q if(FAILED(hres)) 6 R" }) t1 m% Y% N/ v
{
$ x& T# Z" o& o8 j3 H cout<<"Could not set proxy blanket. Error code = 0x"
W, d! o+ `" {3 Q <<hex<<hres<<endl ; , C" u) j; J# y* x. y
pSvc->Release(); , d; T, ]; k P
pLoc->Release();
: O' z* R* O- s3 b4 X* ` CoUninitialize();
% J3 T" q p0 u( K* h. ` return 1 ; 3 y% t! ]- l! X' u
// Program has failed.
/ L% s& F9 F% v% P } . N) H7 S& T5 Z( b! {7 e
* J! a! W/ ^, Q% M. ~' g4 H 5 w+ O/ N) Q9 M' t/ |
// Use the IWbemServices pointer to make requests of WMI.
# g" j" B. m8 a& U0 \$ Y4 X- r // Make requests here:
( J) M6 b4 Q! W$ C# H & R7 r; J$ Y |! B5 l% T) S0 {. _: m
// For example, query for print queues that have more than 10 jobs
! W9 c2 [6 d& Q" \ [6 p IEnumWbemClassObject*pEnumerator=NULL ;
3 Q# h% K6 X) J5 h$ l hres=pSvc->ExecQuery( ! [; s& L# n1 K- m8 g
bstr_t("WQL"), % h' I- |* d& r/ t" p' }2 j# \- w6 }
bstr_t("SELECT * from Win32_BIOS"), 9 D- o% Y, ?2 `5 P
WBEM_FLAG_FORWARD_ONLY|WBEM_FLAG_RETURN_IMMEDIATELY,
9 \ ~; Z- s) K. w. n NULL, / O* D9 i5 }4 {9 C4 U
&pEnumerator); 0 R, h- D. f, S5 k& J+ O
3 } d% o! \2 a! Z if(FAILED(hres))
0 W0 W3 T( q% C* Q4 _ { 6 L) P# S; w& c% N. T
cout<<"Query for print queues failed. Error code = 0x"
) {* Q5 W9 ]% o0 T+ s <<hex<<hres<<endl ;
% f. S! B, G+ m/ s! c) C% p- A pSvc->Release(); ; Q+ Y# m b2 d' k& a: r
pLoc->Release();
- P8 F$ K6 @# a3 L$ m CoUninitialize(); 3 S" O3 \- g9 H/ b0 i
return 1 ; 9 U- _ d2 w, F! V- T; j9 d+ [
// Program has failed.
0 a$ e$ V. g# V5 B# J Q5 N }
- N1 Q% f8 z" R) ]2 L4 ` else
$ C' C$ u& a! P { # ~8 v, S7 K! Q
IWbemClassObject*pInstance=NULL ; $ h5 v6 N g) Z
ULONG dwCount ;
. |& T! q8 A. [. q2 Q+ B. m+ e while(pEnumerator->Next( 8 ?7 {! G+ J8 s, h% S) R4 q! Y
WBEM_INFINITE, ' ^5 A) D7 U. F- f: n
1,
- h, v) i: G7 _% _ &pInstance,
- R% Y6 ^' E$ p; Y &dwCount)==S_OK) 5 {1 P8 w+ m+ j9 T1 \
{
% ~ ?" n7 m5 M# H" `; p) }& } SAFEARRAY*pvNames=NULL ; . x3 L: P6 L; O. ]" `) o
if(pInstance->GetNames(NULL,WBEM_FLAG_ALWAYS|WBEM_MASK_CONDITION_ORIGIN,NULL,&pvNames)==S_OK)
, C1 m# v& a. r3 ]1 B& K9 k {
" T( e- V1 n: H) h A, _% o, a* t long vbl,vbu ; 0 r" M/ G! f, X$ c, p
SafeArrayGetLBound(pvNames,1,&vbl); 8 f. z4 t! y: K
SafeArrayGetUBound(pvNames,1,&vbu); 0 Q( C8 z" a# ]; R
for(long idx=vbl;idx<=vbu;idx++) 5 S9 P* t4 r t+ E
{
4 |, h$ {: K( V r' R0 k% C1 e long aidx=idx ;
* X w% s- \: o0 k wchar_t *wsName=0 ; 1 E5 Q6 d( j; b
VARIANT vValue ; 7 @8 e; [1 [$ F+ U1 b# h
VariantInit(&vValue); 9 {% A7 n: ?. h& i4 _5 Z4 ?; u$ o3 J
% U: Q, c6 g8 s3 F! _% S" i
SafeArrayGetElement(pvNames,&aidx,&wsName);
6 W' r/ v5 ?, e, a; S5 o) U0 Y
. V5 o( d9 K2 E; M% e, G. X1 D8 p& q' w BSTR bs=SysAllocString(wsName); # h9 F* B/ m( P+ z# V
hres=pInstance->Get(bs,0,&vValue,NULL,0); 0 I8 N* J* ~+ w- z" Q' ~
SysFreeString(bs); . q% A% M; Y" j- M' r* g/ g9 M
- m7 u0 \; D$ B; A7 q
0 p3 j8 \# v: C) ~
if(SUCCEEDED(hres)) , @' q1 \5 O' O, a) L! V
{
- b% l6 J8 ^' a# E6 C char szANSIString[MAX_PATH]; 7 U4 \& s( P' \0 R
WideCharToMultiByte(CP_ACP,WC_COMPOSITECHECK,wsName,-1, 6 v' o1 G/ z! q
szANSIString,sizeof(szANSIString),NULL,NULL);
3 S0 f9 o0 ~' N3 x3 _' a: L
3 k3 s2 Z3 F* \0 { [& n cout<<szANSIString<<" : " ;
: b0 Q# ]) n1 M7 p" S: z switch(vValue.vt) / p6 A. J' A! g/ b& x
{ , |4 l& v2 M5 b- u6 d
case VT_BSTR : 4 z8 l! u$ H8 w" s: B) {* b/ @
wprintf(L"%s",V_BSTR(&vValue));
' ]5 X" Y+ G* Y3 d9 i! K break ;
! o4 G" s/ J9 w- K! I) X+ `/ K case VT_I2 :
. U* m2 ^4 o6 g9 |. v wprintf(L"%d",V_I2(&vValue)); 1 c: ?# X6 P( `) j& M! l
break ;
& M% t/ P* P4 {* S case VT_I4 : % ~" `5 L" k! w; O
wprintf(L"%d",V_I4(&vValue)); " L0 e% b G8 D$ w
break ;
6 X! q) O# t5 {# F/ V case VT_BOOL :
. _3 M) U, C1 f r6 E, V wprintf(L"%s",V_BOOL(&vValue)?L"TRUE" "FALSE"); 5 n- z4 k9 B3 `
break ; 2 [* i6 z. |- j E3 `
default:
0 O2 p# l/ O9 [) @' j /*WCHAR tmp[100]; # Y+ ?! C% U1 J
wcscpy(tmp, V_BSTR(&vValue)); , |. {# Q6 S; b) I
char tmp1[MAX_PATH]; . j, d l* O$ P7 v2 z
WideCharToMultiByte(CP_ACP,WC_COMPOSITECHECK,tmp,-1,
# ~+ N% M# j# \7 k/ s3 H tmp1,sizeof(tmp1),NULL,NULL); $ Z7 Z1 T& {8 D$ a+ t6 l) P
6 t. T: T" K2 u/ W3 R( a1 j cout<<tmp1;*/ ' ^) }6 z' [! k+ s$ V3 j
break; 2 V2 q) @+ p. g, t( X+ q% ]5 ~: ^
}
" n8 g9 q, l& K g cout<<endl ; 6 G* R! _( h, \1 A( s' A# z: q
} % Z+ C" x, M' n: }% _+ H" V5 d2 L
* g4 L( j/ v& }/ \" Y SysFreeString(wsName); $ |) f) T2 `% a' f& e* L: y
}
" u% ~1 k/ b% n4 W$ k' y9 z3 Y
* |! B1 a8 [6 ]: j2 c6 [* k } ! ?. X4 W8 W3 P
else
3 V& @9 E, T# H$ B3 L( E" ^+ m { ) N8 [+ v. W2 T+ L% H4 w
cout<<"Query for print queues failed. Error code = 0x" 2 T2 o5 i+ ]+ }' }0 H. l2 v
<<hex<<hres<<endl ; 9 E( n Z0 j* N' G
pSvc->Release();
4 `3 e# ^2 B& A0 f2 ~5 N9 e pLoc->Release();
$ b" y6 r6 X3 }# Z: J& M7 x CoUninitialize();
2 w3 h& Q% i8 b. |: J return 1 ; ) n, z5 _( C& S- L
// Program has failed.
9 U0 J7 H$ C( G6 ^3 r }
8 D, e1 k' m, U: q0 s+ \ if(pvNames)SafeArrayDestroy(pvNames);
+ b* e0 O! g+ G& | }
. T) Y! f9 ]- r; l3 M if(pInstance)pInstance->Release();
/ v/ g9 [6 E4 f2 Y
0 i% V8 \9 N& M. P. O }
) w% V* u8 g. U // Cleanup ! T( F0 `* G @) i+ p5 v8 D
// ========
' k( ?4 o5 x# M; k% G) E) x pEnumerator->Release(); 2 a1 }! |/ k7 I% A/ a" L( A
pSvc->Release();
5 e$ _1 |" T8 O/ o8 p+ i: ^ pLoc->Release(); . N4 O, W9 |3 D0 _
CoUninitialize(); ) W6 f- J2 ]8 I9 c P" g( ?
7 p% U6 C, J( u: P( ~$ U: d
return 0; + W, ?& A3 R1 X! q) }! v& }
// Program successfully completed.
" v$ r/ A) [& B p' [0 a } b( b. r- p8 J1 P. u# P
//-----------------------------------& ?( R! k" {2 P/ T' I* L
1 S/ w1 a4 }% r: M% u
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. * W2 e' g/ {. E8 [# \
$ {$ C! u1 C/ F$ }# s' @- K void GetWmiInfo(TStrings *lpList, WideString wsClass)
5 l5 O# `/ M" ]2 Z# l. M6 z1 U { ; k5 }( V [+ z) z- T
IWbemLocator *pWbemLocator = NULL; 0 b k/ o9 L2 B- _; \8 d* x! i9 S! u
if(CoCreateInstance(CLSID_WbemAdministrativeLocator, NULL, CLSCTX_INPROC_SERVER|CLSCTX_LOCAL_SERVER, IID_IUnknown, (void**)&pWbemLocator) == S_OK) $ G% x" e: i- e3 r
{
5 h" Q0 O$ o% x. F4 M$ U IWbemServices *pWbemServices = NULL; ) R# s( _9 `: j5 J% t& M
WideString wsNamespace = (L"root\cimv2"); , w' f6 _* q @" n- p& X) y
if(pWbemLocator->ConnectServer(wsNamespace, NULL, NULL, NULL, 0, NULL, NULL, &pWbemServices) == S_OK) & z% Y A9 C' ]
{ 7 W# f9 N. A" @% |# \/ h
IEnumWbemClassObject *pEnumClassObject = NULL; 9 P1 m- S9 l1 p% E: K
WideString wsWQL=L"WQL", wsQuery=WideString(L"Select * from ")+wsClass;
$ Z* s/ k: [9 t. m3 M: F* ~/ K, B if(pWbemServices->ExecQuery(wsWQL, wsQuery, WBEM_FLAG_RETURN_IMMEDIATELY,NULL, &pEnumClassObject) == S_OK)
2 c9 _! A1 Q7 J |) X+ w7 a; a2 ~/ j {
7 q# c, F8 r$ g3 G3 |+ q* v$ j IWbemClassObject *pClassObject = NULL;
# F4 M' {! [ U+ x; O- F2 `0 S* S @ ULONG uCount = 1, uReturned; 0 h5 R3 Q4 x3 v* i% ~2 e5 |* @
if(pEnumClassObject->Reset() == S_OK) / P: k7 l3 R$ F
{ u1 P. n n. i8 P" J! ?, `2 I1 K2 f
int iEnumIdx = 0; 9 x0 T& T; b7 S$ X
while(pEnumClassObject->Next(WBEM_INFINITE, uCount, &pClassObject, &uReturned) == S_OK)
+ i4 p+ o0 p( {2 o4 a1 s) c# u {
$ p# ^8 o) |* c) P; L lpList->Add("---------------- ["+IntToStr(iEnumIdx)+"] -----------------");
4 `" f; w! I) H6 X+ v; _9 y + \5 h* @: a: Q5 d& x/ u: }
SAFEARRAY *pvNames = NULL;
( `8 T, `/ {- }) x if(pClassObject->GetNames(NULL, WBEM_FLAG_ALWAYS | WBEM_MASK_CONDITION_ORIGIN, NULL, &pvNames) == S_OK)
) U; w# L' J" V2 f* W! _- w, i {
+ D1 S' R* l/ f# ~8 }: q long vbl, vbu; & |# e$ B2 N3 d4 g( P" P
SafeArrayGetLBound(pvNames, 1, &vbl); " {; x2 e) I# L! w
SafeArrayGetUBound(pvNames, 1, &vbu);
' k. m& @. V# m& r: C for(long idx=vbl; idx<=vbu; idx++)
% _7 a7 h# K, [9 q* W { |
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