안녕하세요 경호입니다.

윈도우의 빌드 버젼을 알아내는 것은 GetVersion();을 사용하시면 됩니다.

헬프 내용입니다.
This function does not return the current version number of MS-DOS.
The following code fragment illustrates how to extract information from the GetVersion return value:

 
dwVersion = GetVersion();

// Get major and minor version numbers of Windows

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

// Get build numbers for Windows NT or Win32s

if (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;

그럼 즐프하세요 ^^