获取Windows操作系统版本和位数

（1）获取系统位数32bit 64bit

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;
	}
}

前面的博文中已经对Windows操作系统产品名与内部版本号的对应做了总结，参考：http://blog.csdn.net/shufac/article/details/52088374
通过下面的函数可以获取版本相关的信息，函数如下：

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;
}