C / C++ / MFC

// GetDllVersion - Returns version # in a string: "1.2.3.4"
 
bool GetDllVersion ( LPTSTR szDllFilename, CString& sProductVersion )
{
DWORD dwHandle, dwInfoSize;
BYTE* pBuffer;
void* pvVersion;
UINT  uBufLen;
 
    // Read the ProductVersion info block and return it in sProductVersion.
    // Returns true/false on success/failure.
 
    dwInfoSize = GetFileVersionInfoSize ( szDllFilename, &dwHandle );
 
    if ( 0 == dwInfoSize )
        return false;
 
    pBuffer = new BYTE [dwInfoSize];
 
    if ( NULL == pBuffer )
        return false;
 
__try
    {
    if ( 0 == GetFileVersionInfo ( szDllFilename, dwHandle, dwInfoSize, pBuffer ))
        return false;
 
    if ( 0 == VerQueryValue ( pBuffer, _T("\\StringFileInfo\\040904B0\\ProductVersion"),
                              &pvVersion, &uBufLen ))
        return false;
 
    sProductVersion = (LPCTSTR) pvVersion;
    }
__finally
    {
    delete [] pBuffer;
    }
 
    return true;
}