获取Windows操作系统版本和位数

void CXXXDlg::GetSysBit(bool& bIs32Bit)
{
bIs32Bit=true;
SYSTEM_INFO si;
// Copy the hardware information to the SYSTEM_INFO structure.
GetNativeSystemInfo(&si);
// Display the contents of the SYSTEM_INFO structure.
printf("si.wProcessorArchitecture = %d\nPROCESSOR_ARCHITECTURE_AMD64 = %d\nPROCESSOR_ARCHITECTURE_IA64 = %d\n",
si.wProcessorArchitecture, PROCESSOR_ARCHITECTURE_AMD64, PROCESSOR_ARCHITECTURE_IA64);
if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64 || si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_IA64)
{
bIs32Bit=false;
}
else{
bIs32Bit=true;
}
}

void  CXXXDlg::GetSysType(DWORD& dwMajorVersion,DWORD& dwMinorVersion)
{
//DWORD dwOSVersionInfoSize;//
//DWORD dwMajorVersion;//主版本号
//DWORD dwMinorVersion;//副版本
//DWORD dwBuildNumber;//创建号
//DWORD dwPlatformId;//ID号
//WCHAR  szCSDVersion[ 128 ]; //
dwMajorVersion=0;
dwMinorVersion=0;
OSVERSIONINFO osvi;                                                     //定义OSVERSIONINFO数据结构对象
memset(&osvi, 0, sizeof(OSVERSIONINFO));                    //开空间
osvi.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);   //定义大小
GetVersionEx (&osvi);                                                        //获得版本信息
dwMajorVersion=osvi.dwMajorVersion;
dwMinorVersion=osvi.dwMinorVersion;
}