GetVersionEx 获取系统版本信息

最近在windows 8上获取系统版本信息需要调用系统API，于是用到了GetVersionEx。

首先看一看函数原型：

[cpp] view
plain copy

BOOL GetVersionEx(POSVERSIONINFO pVersionInformation);
 
结构OSVERSIONINFOEX定义如下：

[cpp] view
plain copy

typedef struct {  

    DWORD dwOSVersionInfoSize;       //在使用GetVersionEx之前要将此初始化为结构的大小  

    DWORD dwMajorVersion;               //系统主版本号  

    DWORD dwMinorVersion;               //系统次版本号  

    DWORD dwBuildNumber;               //系统构建号  

    DWORD dwPlatformId;                  //系统支持的平台  

    TCHAR szCSDVersion[128];          //系统补丁包的名称  

    WORD wServicePackMajor;            //系统补丁包的主版本  

    WORD wServicePackMinor;            //系统补丁包的次版本  

    WORD wSuiteMask;                      //标识系统上的程序组  

    BYTE wProductType;                    //标识系统类型  

    BYTE wReserved;                         //保留,未使用  

} OSVERSIONINFOEX, *POSVERSIONINFOEX;  

接着在调用函数之前先初始化结构的大小并调用函数，返回true表示成功:

[cpp] view
plain copy

OSVERSIONINFOEX os;  

os.dwOSVersionInfoSize=sizeof(os);  

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

{  

      return FALSE;  

}  

函数调用成功以后就可以通过OSVERSIONINFOEX来查看系统的版本信息了。
根据微软操作系统编号发现windows 8 对应的windows version number是6.2
如下： 
Operating system
Version number
Windows 8
6.2
Windows 7
6.1
Windows Server 2008 R2
6.1
Windows Server 2008
6.0
Windows Vista
6.0
Windows Server 2003 R2
5.2
Windows Server 2003
5.2
Windows XP
5.1
Windows 2000
5.0

下面是一个通过系统版本来判断操作系统名称的例子：

[cpp] view
plain copy

CString getSystemName()  

{  

    SYSTEM_INFO info;                //用SYSTEM_INFO结构判断64位AMD处理器  

    GetSystemInfo(&info);            //调用GetSystemInfo函数填充结构  

    OSVERSIONINFOEX os;  

    os.dwOSVersionInfoSize=sizeof(OSVERSIONINFOEX);   

    if(GetVersionEx((OSVERSIONINFO *)&os))                    

    {  

        CString vname;  

  

        //下面根据版本信息判断操作系统名称  

        switch(os.dwMajorVersion){                        //判断主版本号  

            case 4:  

                switch(os.dwMinorVersion){                //判断次版本号  

                    case 0:  

                        if(os.dwPlatformId==VER_PLATFORM_WIN32_NT)  

                            vname=_T("Microsoft Windows NT 4.0");  //1996年7月发布  

                        else if(os.dwPlatformId==VER_PLATFORM_WIN32_WINDOWS)  

                            vname=_T("Microsoft Windows 95");  

                        break;  

                    case 10:  

                        vname=_T("Microsoft Windows 98");  

                        break;  

                    case 90:  

                        vname=_T("Microsoft Windows Me");  

                        break;  

                }  

                break;  

            case 5:  

                switch(os.dwMinorVersion){               //再比较dwMinorVersion的值  

                    case 0:  

                        vname=_T("Microsoft Windows 2000");    //1999年12月发布  

                        break;  

                    case 1:  

                        vname=_T("Microsoft Windows XP");      //2001年8月发布  

                        break;  

                    case 2:  

                        if(os.wProductType==VER_NT_WORKSTATION &&   

                           info.wProcessorArchitecture==PROCESSOR_ARCHITECTURE_AMD64)  

                            vname=_T("Microsoft Windows XP Professional x64 Edition");  

                        else if(GetSystemMetrics(SM_SERVERR2)==0)  

                            vname=_T("Microsoft Windows Server 2003");   //2003年3月发布  

                        else if(GetSystemMetrics(SM_SERVERR2)!=0)  

                            vname=_T("Microsoft Windows Server 2003 R2");  

                        break;  

                }  

                break;  

            case 6:  

                switch(os.dwMinorVersion){  

                    case 0:  

                        if(os.wProductType==VER_NT_WORKSTATION)  

                            vname=_T("Microsoft Windows Vista");  

                        else  

                            vname=_T("Microsoft Windows Server 2008");   //服务器版本  

                        break;  

                    case 1:  

                        if(os.wProductType==VER_NT_WORKSTATION)  

                            vname=_T("Microsoft Windows 7");  

                        else  

                            vname=_T("Microsoft Windows Server 2008 R2");  

                        break;  

            case 2:  

                vname=_T("Microsoft Windows 7");  

            break;  

                }  

                break;  

            default:  

                vname=_T("未知操作系统");  

        }  

        return vname;  

    }  

    else  

        return _T("");  

}  

以上只能判断操作系统的名称，那如何判断它是什么版本的呢(如Home版或Professional版)。
下面这个函数就返回具体的版本名称：

[cpp] view
plain copy

CString getVersionMark()  

{  

    OSVERSIONINFOEX os;  

    os.dwOSVersionInfoSize=sizeof(OSVERSIONINFOEX);  

    if(GetVersionEx((OSVERSIONINFO *)&os)){  

        CString vmark;  

  

        switch(os.dwMajorVersion){                //先判断操作系统版本  

            case 5:  

                switch(os.dwMinorVersion){  

                    case 0:                  //Windows 2000  

                        if(os.wSuiteMask==VER_SUITE_ENTERPRISE)  

                            vmark=_T("Advanced Server");  

                        break;  

                    case 1:                  //Windows XP  

                        if(os.wSuiteMask==VER_SUITE_EMBEDDEDNT)  

                            vmark=_T("Embedded");  

                        else if(os.wSuiteMask==VER_SUITE_PERSONAL)  

                            vmark=_T("Home Edition");  

                        else  

                            vmark=_T("Professional");  

                        break;  

                    case 2:  

                        if(GetSystemMetrics(SM_SERVERR2)==0 && /  

  

                        os.wSuiteMask==VER_SUITE_BLADE)  //Windows Server 2003  

                            vmark=_T("Web Edition");  

                        else if(GetSystemMetrics(SM_SERVERR2)==0 &&   

                        os.wSuiteMask==VER_SUITE_COMPUTE_SERVER)  

                            vmark=_T("Compute Cluster Edition");  

                        else if(GetSystemMetrics(SM_SERVERR2)==0 &&   

                        os.wSuiteMask==VER_SUITE_STORAGE_SERVER)  

                            vmark=_T("Storage Server");  

                        else if(GetSystemMetrics(SM_SERVERR2)==0 &&   

                        os.wSuiteMask==VER_SUITE_DATACENTER)  

                            vmark=_T("Datacenter Edition");  

                        else if(GetSystemMetrics(SM_SERVERR2)==0 &&   

                        os.wSuiteMask==VER_SUITE_ENTERPRISE)  

                            vmark=_T("Enterprise Edition");  

                        else if(GetSystemMetrics(SM_SERVERR2)!=0 &&   

                           os.wSuiteMask==VER_SUITE_STORAGE_SERVER)   

                            vmark=_T("Storage Server");  

                        break;  

                }  

                break;  

            case 6:  

                switch(os.dwMinorVersion){  

                    case 0:  

                        if(os.wProductType!=VER_NT_WORKSTATION &&   

                        os.wSuiteMask==VER_SUITE_DATACENTER)   

                            vmark=_T("Datacenter Server");  

                        else if(os.wProductType!=VER_NT_WORKSTATION &&   

                        os.wSuiteMask==VER_SUITE_ENTERPRISE)  

                            vmark=_T("Enterprise");  

                        else if(os.wProductType==VER_NT_WORKSTATION &&   

                           os.wSuiteMask==VER_SUITE_PERSONAL)  //Windows Vista  

                            vmark=_T("Home");  

                        break;  

                }  

                break;  

            default:  

                vmark=_T("");  

        }  

        return vmark;  

    }  

    else  

        return _T("");  

}  

另外，操作系统的补丁包名称也可以从szCSDVersion直接获取。