獲得作業系統版本

DWORD dwVersion = GetVersion();

 // Get the Windows version.

 DWORD dwWindowsMajorVersion =  (DWORD)(LOBYTE(LOWORD(dwVersion)));

 DWORD dwWindowsMinorVersion =  (DWORD)(HIBYTE(LOWORD(dwVersion)));

 // Get the build number.

 if (dwVersion < 0x80000000)              // Windows NT/2000/XP

  return WIN_NT_2000_XP;

 else if (dwWindowsMajorVersion < 4)      // Win32s

  return WIN_32S;

 else                                     // Windows 95/98/Me

  return WIN_95_98_ME;