vc 获取系统版本

//获取系统版本
SystemInfo GetSystemVersion()
{
	SystemInfo si=S_ERROR;
	OSVERSIONINFOEX osInfo;
	osInfo.dwOSVersionInfoSize=sizeof(OSVERSIONINFOEX);
	if (::GetVersionEx((OSVERSIONINFO*)&osInfo)==0)
	{
		//MessageBox(NULL,_T("获取系统版本出错"),_T("提示"),IDOK);
		si=  S_ERROR;
	}
	else if (osInfo.dwPlatformId==VER_PLATFORM_WIN32_NT)//WinNt以上版本
	{
		if (osInfo.dwMajorVersion==5)
		{
			if(osInfo.dwMinorVersion==1)
			{
				si= S_WINDOW_XP;
			}
			else if(osInfo.dwMinorVersion==0)
			{
				si= S_WINDOW_2000;
			}
		}
		else if (osInfo.dwMajorVersion==6)
		{
			if (osInfo.dwMinorVersion==2)
			{
				si= S_WINDOW_8;
			}
			else if (osInfo.dwMinorVersion==1&&osInfo.wProductType==VER_NT_WORKSTATION)
			{
				si= S_WINDOW_7;
			}
			else if (osInfo.dwMinorVersion==0&&osInfo.wProductType==VER_NT_WORKSTATION)
			{
				si= S_WINDOW_VISTA;
			}
		}
	}
	return si;
}