作者：朱金燦

        個人不建議用 GetVersion 或GetVersionEx 之類的 API 來獲取系統版本號。注意微軟也說過，這個結果會受到相容模式的影響，即如果程式設定相容模式為 XP 那麼拿到的也可能是 5.1 的。所以要準確的獲取版本號，我建議直接獲取 kernel32.dll 的主版本號，這個是和系統的版本號是一樣的。

        下面是我寫的一個獲取windows版本資訊的兩個函式，供大家參考：

// 具體版本資訊參考Operating System Version https://msdn.microsoft.com/en-us/library/ms724832.aspx
enum enOsInfo
{    
OS_UNKNOWN = 0, // 未知的作業系統
OS_WIN_NT_3_5, // win nt 4.0,1996年7月釋出 
OS_WIN_95,   // win 95
OS_WIN_98,
OS_WIN_ME, // windows me
    OS_WIN_2000,
OS_WIN_XP,
OS_WIN_XP_64, // win xp 64位
OS_WIN_SERVER2003,
    OS_WIN_SERVER2003_R2,
OS_WIN_VISTA,
OS_WIN_SERVER2008,
OS_WIN_SERVER2008_R2,
OS_WIN7,
OS_WIN7_64,
OS_WIN_SERVER2012,
    OS_WIN8, //6.2
OS_WIN8_64,
OS_WIN_SERVER2012_R2,
OS_WIN8_1  // 6.3
};

bool GetWindowsVersion(int& nMajorVersion,int& nMinorVersion,int& nBuildVersion,int& nReviVersion)
{
TCHAR szDLLName[MAX_PATH] = { 0 };
HRESULT hr = SHGetFolderPath(NULL, CSIDL_SYSTEM, NULL, SHGFP_TYPE_CURRENT, szDLLName);
if (SUCCEEDED(hr) && PathAppend(szDLLName, _T("kernel32.dll"))) 
{
DWORD dwVerInfoSize = GetFileVersionInfoSize(szDLLName, NULL);
if (dwVerInfoSize > 0) {
LPVOID pvVerInfoData = (LPVOID)new BYTE[dwVerInfoSize];
if (GetFileVersionInfo(szDLLName, 0, dwVerInfoSize, pvVerInfoData)) {
UINT ulLength = 0;
VS_FIXEDFILEINFO* pVsInfo = NULL;
if (VerQueryValue(pvVerInfoData, _T("\\"), (LPVOID *)&pVsInfo, &ulLength)) 
{
nMajorVersion = HIWORD(pVsInfo->dwFileVersionMS);
nMinorVersion = LOWORD(pVsInfo->dwFileVersionMS);
nBuildVersion = HIWORD(pVsInfo->dwFileVersionLS);
nReviVersion = LOWORD(pVsInfo->dwFileVersionLS);
delete[] pvVerInfoData;
return true;
}
}
delete[] pvVerInfoData;
}
}
return false;
}

enOsInfo GetOsInfo()
{
        enOsInfo os_info =  OS_UNKNOWN;

int nMajorVersion,nMinorVersion,nBuildVersion,nReviVersion;
if(GetWindowsVersion( nMajorVersion,nMinorVersion,nBuildVersion,nReviVersion))
{
            switch(nMajorVersion)
{
case 3:
{
                   os_info = OS_WIN_NT_3_5;
   break;
}
case 4:
{
switch(nMinorVersion)
{
case 0:
os_info = OS_WIN_95;
break;
case 1:
os_info = OS_WIN_98;
break;
case 9:
os_info = OS_WIN_ME;
break;
default:
                        break;
}
   break;
}
case 5:
{
switch(nMinorVersion)
{
case 0:
os_info = OS_WIN_2000;
break;
case 1:
os_info = OS_WIN_XP;
break;
case 2:
{
SYSTEM_INFO info;        //用SYSTEM_INFO結構判斷64位AMD處理器   
GetNativeSystemInfo(&info);    //呼叫GetSystemInfo函式填充結構   
OSVERSIONINFOEX os;   
os.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);     

if(GetVersionEx((OSVERSIONINFO *)&os))  
{
if(os.wProductType==VER_NT_WORKSTATION   
&&(info.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64||
info.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_IA64))  
{  
os_info = OS_WIN_XP_64; 
}  
else if(GetSystemMetrics(SM_SERVERR2)==0)  
    os_info = OS_WIN_SERVER2003; //2003年3月釋出
else if(GetSystemMetrics(SM_SERVERR2)!=0)  
os_info = OS_WIN_SERVER2003_R2; 
}
break;
}
default:
break;
}
break;
}
    case 6:
{
SYSTEM_INFO info;        //用SYSTEM_INFO結構判斷64位AMD處理器   
GetNativeSystemInfo(&info);    //呼叫GetSystemInfo函式填充結構 
OSVERSIONINFOEX os;   
os.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);     

if(!GetVersionEx((OSVERSIONINFO *)&os)) 
break;

switch(nMinorVersion)
{
case 0:
{
if(os.wProductType == VER_NT_WORKSTATION)  
os_info = OS_WIN_VISTA; 
else
os_info = OS_WIN_SERVER2008;
break;
}
case 1:
if(os.wProductType == VER_NT_WORKSTATION) 
{
if(info.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64
||info.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_IA64)
os_info = OS_WIN7_64;
else
    os_info = OS_WIN7;
}
else
os_info = OS_WIN_SERVER2008_R2;
break;
case 2:
{
if(os.wProductType == VER_NT_WORKSTATION) 
{
if(info.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64
 ||info.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_IA64)
os_info = OS_WIN8_64;
else
os_info = OS_WIN8;
}
else
os_info = OS_WIN_SERVER2012; 
break;
}
case 3:
{
if(os.wProductType == VER_NT_WORKSTATION) 
{
os_info = OS_WIN8_1;
}
else
os_info = OS_WIN_SERVER2012_R2;
break;
}
default:
break;
}
break;
}
default:
break;
}
}
return os_info;
}
 

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