判断windows 版本

Windows 2000:       dwMajorVersion = 5 dwMinorVersion = 0 Windows XP:         dwMajorVersion = 5 dwMinorVersion = 1 Windows Vista:      dwMajorVersion = 6API函数：GetVersionEx()void __fastcall TForm1::FormCreate(TObject *Sender){  OSVERSIONINFO info ;  info.dwOSVersionInfoSize = sizeof (info) ;  GetVersionEx (&info) ;  switch (info.dwPlatformId)  {  case VER_PLATFORM_WIN32s:    Label1->Caption = "System:  Windows Win 32s" ;    break ;  case VER_PLATFORM_WIN32_WINDOWS:    Label1->Caption = "System:  Windows 95" ;    break ;  case VER_PLATFORM_WIN32_NT:    Label1->Caption = "System:  Windows NT" ;    break ;  default:    Label1->Caption = "System:  Unknown" ;    break ;  }  Label2->Caption = String ("Version: ")     + String ((int) info.dwMajorVersion) + "." + String((int)info.dwMinorVersion) ;  Label3->Caption = String ("Build:  ") + String ((int) (info.dwBuildNumber & 0xFFFF)) ;  Label4->Caption = String ("System Info:  '") + info.szCSDVersion + "'" ;}或者The following code fragment illustrates how to extract information from the GetVersion return value:  dwVersion = GetVersion();// Get major and minor version numbers of WindowsdwWindowsMajorVersion =  (DWORD)(LOBYTE(LOWORD(dwVersion)));dwWindowsMinorVersion =  (DWORD)(HIBYTE(LOWORD(dwVersion)));// Get build numbers for Windows NT or Win32sif (dwVersion < 0x80000000)                // Windows NT    dwBuild = (DWORD)(HIWORD(dwVersion));else if (dwWindowsMajorVersion < 4)        // Win32s    dwBuild = (DWORD)(HIWORD(dwVersion) & ~0x8000);else        // Windows 95 -- No build numbers provided    dwBuild =  0;