获取系统硬件信息

由于项目需要，要求做一个服务器的实时性能监控（CPU、内存、网络利用率等）和读取服务器的硬件配置参数的接口供项目组使用，就是一个类似于鲁大师之类的东东吧...

还有一种方案就是--->“强大”的WMI，.net平台的程序员可能对这个比较熟悉，WMI即windows管理规范。通过它可以访问、配置、管理和监视几乎所有的Windows资源。当然对于程序员而言在WMI体系结构中我们最需要关心的就是WMI提供的程序和接口。

WMI提供程序在WMI和托管资源之间扮演着中间方的角色。提供程序代表使用者应用程序和脚本从WMI托管资源请求信息，并发送指令到WMI托管资源。

下面是我们利用WMI编程经常要用到的WMI内置提供程序清单，以供编程参考。

1.Active Directory提供程序

链接库文件：dsprov.dll

命名空间：rootdirectoryldap

作用：将Active Directory 对象映射到 WMI。

2.事件日志提供程序

链接库文件：ntevt.dll

命名空间：rootcimv2

作用：管理 Windows 事件日志，例如，读取、备份、清除、复制、删除、监视、重命名、压缩、解压缩和更改事件日志设置。

3.注册表提供程序

链接库文件：stdprov.dll

命名空间：rootdefault

作用：读取、写入、枚举、监视、创建、删除注册表项和值。

4.Win32 提供程序

链接库文件：cimwin32.dll

命名空间：rootcimv2

作用：提供关于计算机、磁盘、外围设备、文件、文件夹、文件系统、网络组件、操作系统、打印机、进程、安全性、服务、共享、SAM 用户及组，以及更多资源的信息。

5.Windows 安装程序提供程序

链接库文件：msiprov.dll

命名空间：rootcimv2

作用：提供对已安装软件信息的访问。

以上可以看出WMI中的类被分组到不同的命名空间中，所以我们在调用相应的程序库时要注意引入对应的命名空间~~~我们今天用到的库就是cimwin32.dll库（第4个）。

好，废话到此为止,还有不懂的自己下去慢慢研究：现在看代码...

一、基于API方式的实现代码，简单的对部分API函数的封装：

1、GetSysInfo.h文件

pragma once

#include <afxtempl.h>

class GetSysInfo
{
public:
GetSysInfo(void);
~GetSysInfo(void);

public:

void GetOSVersion(CString &strOSVersion,CString &strServiceVersion);
BOOL IsWow64();//判断是否为64位操作系统

int  GetInterFaceCount();
void GetInterFaceName(CString &InterfaceName,int pNum);
void GetMemoryInfo(CString &dwTotalPhys,CString &dwTotalVirtual);
void GetCpuInfo(CString &chProcessorName,CString &chProcessorType,DWORD &dwNum,DWORD &dwMaxClockSpeed);
void GetDiskInfo(DWORD &dwNum,CString chDriveInfo[]);
void GetDisplayCardInfo(DWORD &dwNum,CString chCardName[]);
private:
CStringList Interfaces;                       //保存所有网卡的名字
CList < DWORD, DWORD &>       Bandwidths;   //各网卡的带宽
CList < DWORD, DWORD &>       TotalTraffics;    //各网卡的总流量
};

2.GetSysInfo.cpp文件

#include "StdAfx.h"
#include "GetSysInfo.h"
#include "float.h"
#include "winperf.h"

GetSysInfo::GetSysInfo(void)
{
}

GetSysInfo::~GetSysInfo(void)
{
}

void GetSysInfo::GetOSVersion(CString &strOSVersion,CString &strServiceVersion)
{
CString str;
OSVERSIONINFOEX osvi;
SYSTEM_INFO si;
BOOL bOsVersionInfoEx;

ZeroMemory(&si, sizeof(SYSTEM_INFO));
ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));

osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
if( !(bOsVersionInfoEx = GetVersionEx ((OSVERSIONINFO *) &osvi)) )
{
osvi.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
GetVersionEx ( (OSVERSIONINFO *) &osvi);
}

GetProcAddress(GetModuleHandle(TEXT("kernel32.dll")),
"GetNativeSystemInfo");

GetSystemInfo(&si);
switch (osvi.dwPlatformId)
{
case VER_PLATFORM_WIN32_NT:
if ( osvi.dwMajorVersion == 6 && osvi.dwMinorVersion == 0 )
{
if( osvi.wProductType == VER_NT_WORKSTATION )
{
str.Format(_T("Windows Vista "));
}
else
{
str.Format(_T("Windows Server "Longhorn" "));
}
}
if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 2 )
{
if( GetSystemMetrics(SM_SERVERR2) )
{
str.Format(_T("Microsoft Windows Server 2003 "R2" "));
}
else if( osvi.wProductType == VER_NT_WORKSTATION &&
si.wProcessorArchitecture==PROCESSOR_ARCHITECTURE_AMD64)
{
str.Format(_T("Microsoft Windows XP Professional x64 Edition "));
}
else
{
str.Format(_T("Microsoft Windows Server 2003, "));
}
}

if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 1 )
{
str.Format(_T("Microsoft Windows XP "));
}

if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 0 )
str.Format(_T("Microsoft Windows 2000 "));

if ( osvi.dwMajorVersion <= 4 )
{
str.Format(_T("Microsoft Windows NT "));
}

// Test for specific product on Windows NT 4.0 SP6 and later.
if( bOsVersionInfoEx )
{

//将Service Pack 版本保存
strServiceVersion.Format(_T("Service Pack %d"),osvi.wServicePackMajor);

// Test for the workstation type.
if ( osvi.wProductType == VER_NT_WORKSTATION &&
si.wProcessorArchitecture!=PROCESSOR_ARCHITECTURE_AMD64)
{
if( osvi.dwMajorVersion == 4 )
str = str + _T("Workstation 4.0");
else if( osvi.wSuiteMask & VER_SUITE_PERSONAL )
str = str + _T("Home Edition");
else str = str + _T( "Professional");
}

// Test for the server type.
else if ( osvi.wProductType == VER_NT_SERVER ||
osvi.wProductType == VER_NT_DOMAIN_CONTROLLER )
{
if(osvi.dwMajorVersion==5 && osvi.dwMinorVersion==2)
{
if ( si.wProcessorArchitecture ==
PROCESSOR_ARCHITECTURE_IA64 )
{
if( osvi.wSuiteMask & VER_SUITE_DATACENTER )
str = str + _T("Datacenter Edition for Itanium-based Systems");
else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
str = str + _T("Enterprise Edition for Itanium-based Systems");
}

else if ( si.wProcessorArchitecture ==
PROCESSOR_ARCHITECTURE_AMD64 )
{
if( osvi.wSuiteMask & VER_SUITE_DATACENTER )
str = str + _T( "Datacenter x64 Edition ");
else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
str = str + _T( "Enterprise x64 Edition ");
else str = str + _T( "Standard x64 Edition ");
}

else
{
if( osvi.wSuiteMask & VER_SUITE_DATACENTER )
str = str + _T( "Datacenter Edition ");
else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
str = str + _T( "Enterprise Edition ");
else if ( osvi.wSuiteMask & VER_SUITE_BLADE )
str = str + _T( "Web Edition ");
else str = str + _T( "Standard Edition ");
}
}
else if(osvi.dwMajorVersion==5 && osvi.dwMinorVersion==0)
{
if( osvi.wSuiteMask & VER_SUITE_DATACENTER )
str = str + _T("Datacenter Server ");
else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
str = str + _T( "Advanced Server ");
else str = str + _T( "Server ");
}
else  // Windows NT 4.0
{
if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
str = str + _T ("Server 4.0, Enterprise Edition ");
else str = str + _T ( "Server 4.0 " );
}
}
}
// Test for specific product on Windows NT 4.0 SP5 and earlier
else
{
HKEY hKey;
TCHAR szProductType[256];
DWORD dwBufLen=256*sizeof(TCHAR);
LONG lRet;

lRet = RegOpenKeyEx( HKEY_LOCAL_MACHINE,
_T("SYSTEM\CurrentControlSet\Control\ProductOptions"), 0, KEY_QUERY_VALUE, &hKey );
if( lRet != ERROR_SUCCESS )
strOSVersion = str;
return;

lRet = RegQueryValueEx( hKey, TEXT("ProductType"),
NULL, NULL, (LPBYTE) szProductType, &dwBufLen);
RegCloseKey( hKey );

if( (lRet != ERROR_SUCCESS) ||
(dwBufLen > 256*sizeof(TCHAR)) )
strOSVersion = str;
return;

if ( lstrcmpi( TEXT("WINNT"), szProductType) == 0 )
str = str + _T( "Workstation ");
if ( lstrcmpi( TEXT("LANMANNT"), szProductType) == 0 )
str = str + _T( "Server " );
if ( lstrcmpi( TEXT("SERVERNT"), szProductType) == 0 )
str = str + _T( "Advanced Server ");
str.Format(_T( "%d.%d "), osvi.dwMajorVersion, osvi.dwMinorVersion );
}

// Display service pack (if any) and build number.

if( osvi.dwMajorVersion == 4 &&
lstrcmpi( osvi.szCSDVersion, TEXT("Service Pack 6") ) == 0 )
{
HKEY hKey;
LONG lRet;

// Test for SP6 versus SP6a.
lRet = RegOpenKeyEx( HKEY_LOCAL_MACHINE,
_T("SOFTWARE\Microsoft\Windows NT\CurrentVersion\Hotfix\Q246009"), 0, KEY_QUERY_VALUE, &hKey );
if( lRet == ERROR_SUCCESS )
str.Format(_T( "Service Pack 6a (Build %d)n"),
osvi.dwBuildNumber & 0xFFFF );
else // Windows NT 4.0 prior to SP6a
{
_tprintf( TEXT("%s (Build %d)n"),
osvi.szCSDVersion,
osvi.dwBuildNumber & 0xFFFF);
}

RegCloseKey( hKey );
}
else // not Windows NT 4.0
{
_tprintf( TEXT("%s (Build %d)n"),
osvi.szCSDVersion,
osvi.dwBuildNumber & 0xFFFF);
}

break;

// Test for the Windows Me/98/95.
case VER_PLATFORM_WIN32_WINDOWS:

if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 0)
{
str.Format(_T("Microsoft Windows 95 "));
if (osvi.szCSDVersion[1]=='C' || osvi.szCSDVersion[1]=='B')
str = str + _T("OSR2 ");
}

if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 10)
{
str.Format(_T("Microsoft Windows 98 "));
if ( osvi.szCSDVersion[1]=='A' || osvi.szCSDVersion[1]=='B')
str = str + _T("SE ");
}
if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 90)
{
str.Format(_T("Microsoft Windows Millennium Editionn"));
}
break;

case VER_PLATFORM_WIN32s:
str.Format(_T("Microsoft Win32sn"));
break;
default:
break;
}

strOSVersion = str;
}

BOOL GetSysInfo::IsWow64()
{
typedef BOOL (WINAPI *LPFN_ISWOW64PROCESS) (HANDLE, PBOOL);
LPFN_ISWOW64PROCESS fnIsWow64Process;
BOOL bIsWow64 = FALSE;
fnIsWow64Process = (LPFN_ISWOW64PROCESS)GetProcAddress( GetModuleHandle(_T("kernel32")),"IsWow64Process");
if (NULL != fnIsWow64Process)
{
fnIsWow64Process(GetCurrentProcess(),&bIsWow64);
}
return bIsWow64;
}

void GetSysInfo::GetCpuInfo(CString &chProcessorName,CString &chProcessorType,DWORD &dwNum,DWORD &dwMaxClockSpeed)
{

CString strPath=_T("HARDWARE\DESCRIPTION\System\CentralProcessor\0");//注册表子键路径
CRegKey regkey;//定义注册表类对象
LONG lResult;//LONG型变量－反应结果
lResult=regkey.Open(HKEY_LOCAL_MACHINE,LPCTSTR(strPath),KEY_ALL_ACCESS); //打开注册表键
if (lResult!=ERROR_SUCCESS)
{
return;
}
WCHAR chCPUName[50] = {0};
DWORD dwSize=50;

//获取ProcessorNameString字段值
if (ERROR_SUCCESS == regkey.QueryStringValue(_T("ProcessorNameString"),chCPUName,&dwSize))
{
chProcessorName = chCPUName;
}

//查询CPU主频
DWORD dwValue;
if (ERROR_SUCCESS == regkey.QueryDWORDValue(_T("~MHz"),dwValue))
{
dwMaxClockSpeed = dwValue;
}
regkey.Close();//关闭注册表
//UpdateData(FALSE);

//获取CPU核心数目
SYSTEM_INFO si;
memset(&si,0,sizeof(SYSTEM_INFO));
GetSystemInfo(&si);
dwNum = si.dwNumberOfProcessors;

switch (si.dwProcessorType)
{
case PROCESSOR_INTEL_386:
{
chProcessorType.Format(_T("Intel 386 processor"));
}
break;
case PROCESSOR_INTEL_486:
{
chProcessorType.Format(_T("Intel 486 Processor"));
}
break;
case PROCESSOR_INTEL_PENTIUM:
{
chProcessorType.Format(_T("Intel Pentium Processor"));
}
break;
case PROCESSOR_INTEL_IA64:
{
chProcessorType.Format(_T("Intel IA64 Processor"));
}
break;
case PROCESSOR_AMD_X8664:
{
chProcessorType.Format(_T("AMD X8664 Processor"));
}
break;
default:
chProcessorType.Format(_T("未知"));
break;
}

//GetDisplayName()
}

void  GetSysInfo::GetMemoryInfo(CString &dwTotalPhys,CString &dwTotalVirtual)
{
//   TODO:     Add   extra   initialization   here
MEMORYSTATUS   Mem;
//   get   the   memory   status
GlobalMemoryStatus(&Mem);

DWORD dwSize = (DWORD)Mem.dwTotalPhys/(1024*1024);
DWORD dwVirtSize = (DWORD)Mem.dwTotalVirtual/(1024*1024);

dwTotalPhys.Format(_T("物理内存:%ld MB"),dwSize);
dwTotalVirtual.Format(_T("虚拟内存:%ld MB"),dwVirtSize);
}

int GetSysInfo::GetInterFaceCount()
{

try
{
#define DEFAULT_BUFFER_SIZE 40960L

unsigned char *data = (unsigned char*)malloc(DEFAULT_BUFFER_SIZE);
DWORD type;
DWORD size = DEFAULT_BUFFER_SIZE;
DWORD ret;

char s_key[4096];
sprintf_s(s_key , 4096 , "510");
//RegQueryValueEx的固定调用格式
CString str(s_key);

//如果RegQueryValueEx函数执行失败则进入循环
while((ret = RegQueryValueEx(HKEY_PERFORMANCE_DATA, str, 0, &type, data, &size)) != ERROR_SUCCESS)
{
Sleep(10);
//如果RegQueryValueEx的返回值为ERROR_MORE_DATA(申请的内存区data太小，不能容纳RegQueryValueEx返回的数据)
if(ret == ERROR_MORE_DATA)
{
Sleep(10);
size += DEFAULT_BUFFER_SIZE;
data = (unsigned char*) realloc(data, size);//重新分配足够大的内存

ret = RegQueryValueEx(HKEY_PERFORMANCE_DATA, str, 0, &type, data, &size);//重新执行RegQueryValueEx函数
}
//如果RegQueryValueEx返回值仍旧未成功则函数返回.....(注意内存泄露“free函数”~~~)。
//这个if保证了这个while只能进入一次~~~避免死循环
if(ret != ERROR_SUCCESS)
{
if (NULL != data)
{
free(data);
data = NULL;
}
return 0;//0个接口
}
}

//函数执行成功之后就是对返回的data内存中数据的解析了，这个建议去查看MSDN有关RegQueryValueEx函数参数数据结构的说明
//得到数据块
PERF_DATA_BLOCK  *dataBlockPtr = (PERF_DATA_BLOCK *)data;
//得到第一个对象
PERF_OBJECT_TYPE *objectPtr = (PERF_OBJECT_TYPE *) ((BYTE *)dataBlockPtr + dataBlockPtr->HeaderLength);

for(int a=0 ; a<(int)dataBlockPtr->NumObjectTypes ; a++)
{
char nameBuffer[255] = {0};
if(objectPtr->ObjectNameTitleIndex == 510)
{
DWORD processIdOffset = ULONG_MAX;
PERF_COUNTER_DEFINITION *counterPtr =(PERF_COUNTER_DEFINITION *) ((BYTE *)objectPtr + objectPtr->HeaderLength);

for(int b=0 ; b<(int)objectPtr->NumCounters ; b++)
{
if(counterPtr->CounterNameTitleIndex == 520)
processIdOffset = counterPtr->CounterOffset;

counterPtr =(PERF_COUNTER_DEFINITION *) ((BYTE *) counterPtr + counterPtr->ByteLength);
}

if(processIdOffset == ULONG_MAX) {
if(data != NULL)
{
free(data);
data = NULL;
}
return 0;
}

PERF_INSTANCE_DEFINITION *instancePtr =(PERF_INSTANCE_DEFINITION *)  ((BYTE *) objectPtr + objectPtr->DefinitionLength);

for(int b=0 ; b<objectPtr->NumInstances ; b++)
{
wchar_t *namePtr = (wchar_t *) ((BYTE *)instancePtr + instancePtr->NameOffset);
PERF_COUNTER_BLOCK *counterBlockPtr = (PERF_COUNTER_BLOCK *) ((BYTE *)instancePtr + instancePtr->ByteLength);

char pName[256] = {0};
WideCharToMultiByte(CP_ACP, 0, namePtr, -1, pName, sizeof(nameBuffer), 0, 0);

DWORD bandwith = *((DWORD *) ((BYTE *)counterBlockPtr + processIdOffset));
DWORD tottraff = 0;

Interfaces.AddTail(CString(pName)); //各网卡的名称
Bandwidths.AddTail(bandwith);       //带宽
TotalTraffics.AddTail(tottraff);    // 流量初始化为0

PERF_COUNTER_BLOCK  *pCtrBlk = (PERF_COUNTER_BLOCK *) ((BYTE *)instancePtr + instancePtr->ByteLength);

instancePtr = (PERF_INSTANCE_DEFINITION *) ((BYTE *)instancePtr + instancePtr->ByteLength + pCtrBlk->ByteLength);
}
}
objectPtr = (PERF_OBJECT_TYPE *) ((BYTE *)objectPtr + objectPtr->TotalByteLength);
}
if(data != NULL)
{
free(data);
data = NULL;
}
}
catch(...)
{
return 0;
}
return Interfaces.GetCount();
}

void GetSysInfo::GetInterFaceName(CString &InterfaceName,int pNum)
{

POSITION pos = Interfaces.FindIndex(pNum);
if(pos==NULL)
return ;

InterfaceName = Interfaces.GetAt(pos);
pos = Bandwidths.FindIndex(pNum);
if (pos == NULL)
return;
DWORD dwBandwidth = Bandwidths.GetAt(pos);

CString str;
str.Format(_T("%d"),dwBandwidth);

InterfaceName = InterfaceName + str;
}

void GetSysInfo::GetDiskInfo(DWORD &dwNum,CString chDriveInfo[])
{
DWORD DiskCount = 0;

//利用GetLogicalDrives()函数可以获取系统中逻辑驱动器的数量，函数返回的是一个32位无符号整型数据。
DWORD DiskInfo = GetLogicalDrives();

//通过循环操作查看每一位数据是否为1，如果为1则磁盘为真,如果为0则磁盘不存在。
while(DiskInfo)
{
//通过位运算的逻辑与操作，判断是否为1
Sleep(10);
if(DiskInfo&1)
{
DiskCount++;
}
DiskInfo = DiskInfo >> 1;//通过位运算的右移操作保证每循环一次所检查的位置向右移动一位。*/
}

if (dwNum < DiskCount)
{
return;//实际的磁盘数目大于dwNum
}
dwNum = DiskCount;//将磁盘分区数量保存

//-------------------------------------------------------------------//
//通过GetLogicalDriveStrings()函数获取所有驱动器字符串信息长度
int DSLength = GetLogicalDriveStrings(0,NULL);

WCHAR* DStr = new WCHAR[DSLength];
memset(DStr,0,DSLength);

//通过GetLogicalDriveStrings将字符串信息复制到堆区数组中,其中保存了所有驱动器的信息。
GetLogicalDriveStrings(DSLength,DStr);

int DType;
int si=0;
BOOL fResult;
unsigned _int64 i64FreeBytesToCaller;
unsigned _int64 i64TotalBytes;
unsigned _int64 i64FreeBytes;

//读取各驱动器信息，由于DStr内部数据格式是A:NULLB:NULLC:NULL，所以DSLength/4可以获得具体大循环范围
for(int i=0;i<DSLength/4;++i)
{
Sleep(10);
CString strdriver = DStr+i*4;
CString strTmp,strTotalBytes,strFreeBytes;
DType = GetDriveType(strdriver);//GetDriveType函数，可以获取驱动器类型，参数为驱动器的根目录
switch (DType)
{
case DRIVE_FIXED:
{
strTmp.Format(_T("本地磁盘"));
}
break;
case DRIVE_CDROM:
{
strTmp.Format(_T("DVD驱动器"));
}
break;
case DRIVE_REMOVABLE:
{
strTmp.Format(_T("可移动磁盘"));
}
break;
case DRIVE_REMOTE:
{
strTmp.Format(_T("网络磁盘"));
}
break;
case DRIVE_RAMDISK:
{
strTmp.Format(_T("虚拟RAM磁盘"));
}
break;
case DRIVE_UNKNOWN:
{
strTmp.Format(_T("虚拟RAM未知设备"));
}
break;
default:
strTmp.Format(_T("未知设备"));
break;
}

//GetDiskFreeSpaceEx函数，可以获取驱动器磁盘的空间状态,函数返回的是个BOOL类型数据
fResult = GetDiskFreeSpaceEx (strdriver,
(PULARGE_INTEGER)&i64FreeBytesToCaller,
(PULARGE_INTEGER)&i64TotalBytes,
(PULARGE_INTEGER)&i64FreeBytes);

if(fResult)
{
strTotalBytes.Format(_T("磁盘总容量%fMB"),(float)i64TotalBytes/1024/1024);
strFreeBytes.Format(_T("磁盘剩余空间%fMB"),(float)i64FreeBytesToCaller/1024/1024);
}
else
{
strTotalBytes.Format(_T(""));
strFreeBytes.Format(_T(""));
}
chDriveInfo[i] = strTmp + _T("(") + strdriver + _T("):") + strTotalBytes + strFreeBytes;
si+=4;
}
}

void GetSysInfo::GetDisplayCardInfo(DWORD &dwNum,CString chCardName[])
{
HKEY keyServ;
HKEY keyEnum;
HKEY key;
HKEY key2;
LONG lResult;//LONG型变量－保存函数返回值

//查询"SYSTEM\CurrentControlSet\Services"下的所有子键保存到keyServ
lResult = RegOpenKeyEx(HKEY_LOCAL_MACHINE,TEXT("SYSTEM\CurrentControlSet\Services"),0,KEY_READ,&keyServ);
if (ERROR_SUCCESS != lResult)
return;

//查询"SYSTEM\CurrentControlSet\Enum"下的所有子键保存到keyEnum
lResult = RegOpenKeyEx(HKEY_LOCAL_MACHINE,TEXT("SYSTEM\CurrentControlSet\Enum"),0,KEY_READ,&keyEnum);
if (ERROR_SUCCESS != lResult)
return;

int i = 0,count = 0;
DWORD size = 0,type = 0;
for (;;++i)
{
Sleep(5);
size = 512;
TCHAR name[512] = {0};//保存keyServ下各子项的字段名称

//逐个枚举keyServ下的各子项字段保存到name中
lResult = RegEnumKeyEx(keyServ,i,name,&size,NULL,NULL,NULL,NULL);

//要读取的子项不存在，即keyServ的子项全部遍历完时跳出循环
if(lResult == ERROR_NO_MORE_ITEMS)
break;

//打开keyServ的子项字段为name所标识的字段的值保存到key
lResult = RegOpenKeyEx(keyServ,name,0,KEY_READ,&key);
if (lResult != ERROR_SUCCESS)
{
RegCloseKey(keyServ);
return;
}

size = 512;
//查询key下的字段为Group的子键字段名保存到name
lResult = RegQueryValueEx(key,TEXT("Group"),0,&type,(LPBYTE)name,&size);
if(lResult == ERROR_FILE_NOT_FOUND)
{
//?键不存在
RegCloseKey(key);
continue;
};

//如果查询到的name不是Video则说明该键不是显卡驱动项
if(_tcscmp(TEXT("Video"),name)!=0)
{
RegCloseKey(key);
continue;     //返回for循环
};

//如果程序继续往下执行的话说明已经查到了有关显卡的信息，所以在下面的代码执行完之后要break第一个for循环，函数返回
lResult = RegOpenKeyEx(key,TEXT("Enum"),0,KEY_READ,&key2);
RegCloseKey(key);
key = key2;
size = sizeof(count);
lResult = RegQueryValueEx(key,TEXT("Count"),0,&type,(LPBYTE)&count,&size);//查询Count字段（显卡数目）

dwNum = count;//保存显卡数目
for(int j=0;j <count;++j)
{
TCHAR sz[512] = {0};
TCHAR name[64] = {0};
wsprintf(name,TEXT("%d"),j);
size = sizeof(sz);
lResult  = RegQueryValueEx(key,name,0,&type,(LPBYTE)sz,&size);

lResult = RegOpenKeyEx(keyEnum,sz,0,KEY_READ,&key2);
if (ERROR_SUCCESS)
{
RegCloseKey(keyEnum);
return;
}

size = sizeof(sz);
lResult = RegQueryValueEx(key2,TEXT("FriendlyName"),0,&type,(LPBYTE)sz,&size);
if(lResult == ERROR_FILE_NOT_FOUND)
{
size = sizeof(sz);
lResult = RegQueryValueEx(key2,TEXT("DeviceDesc"),0,&type,(LPBYTE)sz,&size);
chCardName[j] = sz;//保存显卡名称
};
RegCloseKey(key2);
key2 = NULL;
};
RegCloseKey(key);
key = NULL;
break;
}
}

以上就是对系统API的简单封装，可以看出用的最多的就是RegOpenKeyEx、RegQueryValueEx之类的查询注册表的函数，基本上所有系统信息都可以通过注册表查到，所以...感兴趣的童鞋有空可以去研究研究注册表~~~~~~这里只是提供一个思路也许有更好的方法来实现~~~求交流~~

二、通过WMI（windows管理规范）接口编程来实现系统硬件信息的获取~~这个相较于上面API方式就方便多了~~~使用起来是相当的方面~~~但是....但是.....这个他妈的实在是太慢了~~~~~比上面的API方式要慢很多倍~~~我没有试过WMI在.net平台下的效果，但至少在MFC工程里面是相当的慢，看代码~~

1、WMIInfo.h文件

<span style="background-color: rgb(255, 255, 255);">#pragma once
#include <atlbase.h>
#include <afxpriv.h>
#include <WbemIdl.h>
#pragma comment(lib,"WbemUuid.lib")

class CWmiInfo
{
public:
CWmiInfo(void);
~CWmiInfo(void);

public:
HRESULT InitWmi();    //初始化WMI
HRESULT ReleaseWmi(); //释放

BOOL GetSingleItemInfo(CString,CString,CString&);<pre class="cpp" name="code" style="margin-top: 4px; margin-right: 0px; margin-bottom: 4px; margin-left: 0px; background-color: rgb(240, 240, 240); ">        BOOL GetGroupItemInfo(CString,CString[],int,CString&);

private:
void VariantToString(const LPVARIANT,CString &) const;//将Variant类型的变量转换为CString
private:
IEnumWbemClassObject* m_pEnumClsObj;
IWbemClassObject* m_pWbemClsObj;
IWbemServices* m_pWbemSvc;
IWbemLocator* m_pWbemLoc;
};
2.WMIInfo.CPP文件
view plain
#include "StdAfx.h"
#include "WmiInfo.h"

CWmiInfo::CWmiInfo(void)
{
m_pWbemSvc=NULL;
m_pWbemLoc=NULL;
m_pEnumClsObj = NULL;
}

CWmiInfo::~CWmiInfo(void)
{
m_pWbemSvc=NULL;
m_pWbemLoc=NULL;
m_pEnumClsObj = NULL;
}

HRESULT CWmiInfo::InitWmi()
{
HRESULT hr;

//一、初始化COM组件
//初始化COM
hr=::CoInitializeEx(0,COINIT_MULTITHREADED);
if (SUCCEEDED(hr) || RPC_E_CHANGED_MODE == hr)
{
//设置进程的安全级别，（调用COM组件时在初始化COM之后要调用CoInitializeSecurity设置进程安全级别，否则会被系统识别为病毒）
hr=CoInitializeSecurity(NULL,
-1,
NULL,
NULL,
RPC_C_AUTHN_LEVEL_PKT,
RPC_C_IMP_LEVEL_IMPERSONATE,
NULL,
EOAC_NONE,
NULL);
//VERIFY(SUCCEEDED(hr));

//二、创建一个WMI命名空间连接
//创建一个CLSID_WbemLocator对象
hr=CoCreateInstance(CLSID_WbemLocator,
0,
CLSCTX_INPROC_SERVER,
IID_IWbemLocator,
(LPVOID*)&m_pWbemLoc);
VERIFY(SUCCEEDED(hr));

//使用m_pWbemLoc连接到"rootcimv2"并设置m_pWbemSvc的指针
hr=m_pWbemLoc->ConnectServer(CComBSTR(L"ROOT\CIMV2"),
NULL,
NULL,
0,
NULL,
0,
0,
&m_pWbemSvc);
VERIFY(SUCCEEDED(hr));

//三、设置WMI连接的安全性
hr=CoSetProxyBlanket(m_pWbemSvc,
RPC_C_AUTHN_WINNT,
RPC_C_AUTHZ_NONE,
NULL,
RPC_C_AUTHN_LEVEL_CALL,
RPC_C_IMP_LEVEL_IMPERSONATE,
NULL,
EOAC_NONE);
VERIFY(SUCCEEDED(hr));

}
return(hr);
}

HRESULT CWmiInfo::ReleaseWmi()
{
HRESULT hr;

if (NULL != m_pWbemSvc)
{
hr=m_pWbemSvc->Release();
}
if (NULL != m_pWbemLoc)
{
hr=m_pWbemLoc->Release();
}
if (NULL != m_pEnumClsObj)
{
hr=m_pEnumClsObj->Release();
}

::CoUninitialize();

return(hr);
}

BOOL CWmiInfo::GetSingleItemInfo(CString ClassName,CString ClassMember,CString &chRetValue)
{
USES_CONVERSION;

CComBSTR query("SELECT * FROM ");
VARIANT vtProp;
ULONG uReturn;
HRESULT hr;
BOOL bRet = FALSE;

if (NULL != m_pWbemSvc)
{
//查询类ClassName中的所有字段,保存到m_pEnumClsObj中
query+=CComBSTR(ClassName);
hr=m_pWbemSvc->ExecQuery(CComBSTR("WQL"),query,WBEM_FLAG_FORWARD_ONLY|WBEM_FLAG_RETURN_IMMEDIATELY,
0,&m_pEnumClsObj);
if (SUCCEEDED(hr))
{
//初始化vtProp值
VariantInit(&vtProp);
uReturn=0;

//返回从当前位置起的第一个对象到m_pWbemClsObj中
hr=m_pEnumClsObj->Next(WBEM_INFINITE,1,&m_pWbemClsObj,&uReturn);
if(SUCCEEDED(hr)&&uReturn>0)
{
//从m_pWbemClsObj中找出ClassMember标识的成员属性值,并保存到vtProp变量中
hr=m_pWbemClsObj->Get(CComBSTR(ClassMember),0,&vtProp,0,0);
if (SUCCEEDED(hr))
{
VariantToString(&vtProp,chRetValue);
VariantClear(&vtProp);//清空vtProp
bRet = TRUE;
}
}
}
}
if(NULL != m_pEnumClsObj)
{
hr=m_pEnumClsObj->Release();
m_pEnumClsObj = NULL;
}
if(NULL != m_pWbemClsObj)
{
hr=m_pWbemClsObj->Release();
m_pWbemClsObj = NULL;
}
return bRet;
}

BOOL CWmiInfo::GetGroupItemInfo(CString ClassName,CString ClassMember[],int n,CString &chRetValue)
{
USES_CONVERSION;

CComBSTR query("SELECT * FROM ");
CString result,info;
VARIANT vtProp;
ULONG uReturn;
HRESULT hr;
int i;
BOOL bRet = FALSE;
if (NULL  != m_pWbemSvc)
{
query+=CComBSTR(ClassName);
hr=m_pWbemSvc->ExecQuery(CComBSTR("WQL"),query,WBEM_FLAG_FORWARD_ONLY|WBEM_FLAG_RETURN_IMMEDIATELY,0,&m_pEnumClsObj);
if (SUCCEEDED(hr))
{
VariantInit(&vtProp); //初始化vtProp变量
if(m_pEnumClsObj)
{
Sleep(10);
uReturn=0;
hr=m_pEnumClsObj->Next(WBEM_INFINITE,1,&m_pWbemClsObj,&uReturn);
if (SUCCEEDED(hr) &&uReturn>0)
{
for(i=0;i<n;++i)
{
hr=m_pWbemClsObj->Get(CComBSTR(ClassMember[i]),0,&vtProp,0,0);
if (SUCCEEDED(hr))
{
VariantToString(&vtProp,info);
chRetValue+=info+_T("t");
VariantClear(&vtProp);
bRet = TRUE;
}
}
chRetValue+=_T("rn");
}
}
}
}

if(NULL != m_pEnumClsObj)
{
hr=m_pEnumClsObj->Release();
m_pEnumClsObj=NULL;
}
if(NULL != m_pWbemClsObj)
{
hr=m_pWbemClsObj->Release();
m_pWbemClsObj=NULL;
}
return bRet;
}

void CWmiInfo::VariantToString(const LPVARIANT pVar,CString &chRetValue) const
{
USES_CONVERSION;

CComBSTR HUGEP* pBstr;
BYTE HUGEP* pBuf;
LONG low,high,i;
HRESULT hr;

switch(pVar->vt)
{
case VT_BSTR:
{
chRetValue=W2T(pVar->bstrVal);
}
break;
case VT_BOOL:
{
if(VARIANT_TRUE==pVar->boolVal)
chRetValue="是";
else
chRetValue="否";
}
break;
case VT_I4:
{
chRetValue.Format(_T("%d"),pVar->lVal);
}
break;
case VT_UI1:
{
chRetValue.Format(_T("%d"),pVar->bVal);
}
break;
case VT_UI4:
{
chRetValue.Format(_T("%d"),pVar->ulVal);
}
break;

case VT_BSTR|VT_ARRAY:
{
hr=SafeArrayAccessData(pVar->parray,(void HUGEP**)&pBstr);
hr=SafeArrayUnaccessData(pVar->parray);
chRetValue=W2T(pBstr->m_str);
}
break;

case VT_I4|VT_ARRAY:
{
SafeArrayGetLBound(pVar->parray,1,&low);
SafeArrayGetUBound(pVar->parray,1,&high);

hr=SafeArrayAccessData(pVar->parray,(void HUGEP**)&pBuf);
hr=SafeArrayUnaccessData(pVar->parray);
CString strTmp;
high=min(high,MAX_PATH*2-1);
for(i=low;i<=high;++i)
{
strTmp.Format(_T("X"),pBuf[i]);
chRetValue+=strTmp;
}
}
break;
default:
break;
}
}  </span>

上面就是一个WMI的封装，返回参数均以CString类型返回调用顺序：

1.实例化一个CWmiInfo类对象

2.调用InitWmi()函数初始化COM组件等。。。函数中有说明必须调用InitWmi初始化WMI组件，否则所有调用都无意义。

3.调用GetXXX方法获取你要获取的字段值。

4.最后使用完CWmiInfo类对象之后一定要记得调用ReleaseWmi()函数来释放资源

调用说明:

WMI的字段类名好像都是以Win32_开头。。。。如：Win32_Processor，Win32_PhysicalMemory等等。。。所以，你只要在MSDN输入Win32_就会看到很多以WMI结尾的类了。。。剩下的就是你的English水平问题了，这里google也可以帮你，如果你需要的话。

下面给大家列出一些常用的类名：

view plain

// 硬件信息类名

Win32_Processor, // CPU 处理器

Win32_PhysicalMemory, // 物理内存条

Win32_Keyboard, // 键盘

Win32_PointingDevice, // 点输入设备，包括鼠标。

Win32_FloppyDrive, // 软盘驱动器

Win32_DiskDrive, // 硬盘驱动器

Win32_CDROMDrive, // 光盘驱动器

Win32_BaseBoard, // 主板

Win32_BIOS, // BIOS 芯片

Win32_ParallelPort, // 并口

Win32_SerialPort, // 串口

Win32_SerialPortConfiguration, // 串口配置

Win32_SoundDevice, // 多媒体设置，一般指声卡。

Win32_SystemSlot, // 主板插槽 (ISA & PCI & AGP)

Win32_USBController, // USB 控制器

Win32_NetworkAdapter, // 网络适配器

Win32_NetworkAdapterConfiguration, // 网络适配器设置

Win32_Printer, // 打印机

Win32_PrinterConfiguration, // 打印机设置

Win32_PrintJob, // 打印机任务

Win32_TCPIPPrinterPort, // 打印机端口

Win32_POTSModem, // MODEM

Win32_POTSModemToSerialPort, // MODEM 端口

Win32_DesktopMonitor, // 显示器

Win32_DisplayConfiguration, // 显卡

Win32_DisplayControllerConfiguration, // 显卡设置

Win32_VideoController, // 显卡细节。

Win32_VideoSettings, // 显卡支持的显示模式。

// 操作系统

Win32_TimeZone, // 时区

Win32_SystemDriver, // 驱动程序

Win32_DiskPartition, // 磁盘分区

Win32_LogicalDisk, // 逻辑磁盘

Win32_LogicalDiskToPartition, // 逻辑磁盘所在分区及始末位置。

Win32_LogicalMemoryConfiguration, // 逻辑内存配置

Win32_PageFile, // 系统页文件信息

Win32_PageFileSetting, // 页文件设置

Win32_BootConfiguration, // 系统启动配置

Win32_ComputerSystem, // 计算机信息简要

Win32_OperatingSystem, // 操作系统信息

Win32_StartupCommand, // 系统自动启动程序

Win32_Service, // 系统安装的服务

Win32_Group, // 系统管理组

Win32_GroupUser, // 系统组帐号

Win32_UserAccount, // 用户帐号

Win32_Process, // 系统进程

Win32_Thread, // 系统线程

Win32_Share, // 共享

Win32_NetworkClient, // 已安装的网络客户端

Win32_NetworkProtocol, // 已安装的网络协议

在、msdn中输入相应的类名即可查看个类中包括的类成员及其含义~~

以上代码均已在vs2008中编译通过~~~~可以直接使用~~~~~~有不当的地方请指教！！