How to Programmatically Get the Version of a DLL or EXE File in C/C ?

How to Get the Version of a DLL or EXE File Programmatically

Obtaining the product and file versions of a DLL or EXE file is a crucial aspect of software development. To accomplish this in C or C using Win32 native APIs, follow these steps:

1. Utilize the GetFileVersionInfo API:

   This function provides access to version information associated with the specified file.

2. Example Implementation:

   The following code demonstrates how to use the GetFileVersionInfo API to retrieve the version numbers:

   DWORD verHandle = 0;
   UINT size = 0;
   LPBYTE lpBuffer = NULL;
   DWORD verSize = GetFileVersionInfoSize(szVersionFile, &verHandle);
   
   if (verSize != NULL)
   {
       LPSTR verData = new char[verSize];
   
       if (GetFileVersionInfo(szVersionFile, verHandle, verSize, verData))
       {
           if (VerQueryValue(verData, "\", (VOID FAR* FAR*)&lpBuffer, &size))
           {
               if (size)
               {
                   VS_FIXEDFILEINFO *verInfo = (VS_FIXEDFILEINFO *)lpBuffer;
                   if (verInfo->dwSignature == 0xfeef04bd)
                   {
                       // DWORD is always 32 bits, so first two revision numbers
                       // come from dwFileVersionMS, last two come from dwFileVersionLS
                       TRACE("File Version: %d.%d.%d.%d\n",
                           (verInfo->dwFileVersionMS >> 16) & 0xffff,
                           (verInfo->dwFileVersionMS >> 0) & 0xffff,
                           (verInfo->dwFileVersionLS >> 16) & 0xffff,
                           (verInfo->dwFileVersionLS >> 0) & 0xffff
                       );
                   }
               }
           }
       }
       delete[] verData;
   }

By leveraging the GetFileVersionInfo API, you can effectively retrieve the version information of DLL or EXE files, enabling you to perform version checking and other related tasks.

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