怎样确定当前的 Windows系统版本？？？

Question

OSVERSIONINFO osvi;
osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
GetVersionEx(&osvi);

Answer 1

dwVersion = GetVersion();
 
// Get the Windows version.dwWindowsMajorVersion =  (DWORD)(LOBYTE(LOWORD(dwVersion)));
dwWindowsMinorVersion =  (DWORD)(HIBYTE(LOWORD(dwVersion)));// Get the build number.if (dwVersion < 0x80000000)             // Windows NT/2000, Whistler
    dwBuild = (DWORD)(HIWORD(dwVersion));
else if (dwWindowsMajorVersion < 4)      // Win32s
    dwBuild = (DWORD)(HIWORD(dwVersion) & ~0x8000);
else                                     // Windows 95/98/Me
    dwBuild =  0;

Answer 2

OSVERSIONINFO versionInfo;
versionInfo.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
GetVersionEx (&versionInfo);