How To Interpret the Results of InternetQueryOption with the INTERNET_VERSION_INFO Structure (244857)

MORE INFORMATION

You can use the INTERNET_VERSION_INFO structure as follows (error checking code is omitted):

INTERNET_VERSION_INFO structVI;
DWORD dwStructSize = sizeof(INTERNET_VERSION_INFO);
InternetQueryOption (NULL, INTERNET_OPTION_VERSION,
                    (LPVOID)&structVI, &dwStructSize);
printf("WinINet Major Version: %d\n", structVI.dwMajorVersion);
printf("WinINet Minor Version: %d\n", structVI.dwMinorVersion);
				

The Platform SDK contains the following description of the INTERNET_OPTION_VERSION flag that can be used with the InternetQueryOption function: The INTERNET_VERSION_INFO structure returned by this function call can be interpreted as follows:

dwMajorVersion	dwMinorVersion	WinInet Version
1	0	Internet Explorer 3
1	1	Internet Explorer 4
1	2	Internet Explorer 5

It is possible to get exact Wininet.dll version information (as shown in file properties) by using version APIs as follows:

#define SWAPWORDS(X) ( (X<<16) | (X>>16) )
...
if (! (dwSize = GetFileVersionInfoSize (TEXT("wininet.dll"), &dwHandle) ) )
{
    dwError = GetLastError();
    if (dwError == 2)
       // 2 is file no found error
       cerr << "Wininet.dll is not found" << endl;
    else if (dwError == 1812)<BR/>
       // 1812 means no resource section information, very unlikely case
       cerr << "Wininet.dll does contain resource section" << endl;
    else
       cerr << "GetFileVersionInfoSize failed: " << 
       GetLastError() << endl;
       return 0;
}

lpBuffer = new TCHAR [dwSize]; 
if (!GetFileVersionInfo (TEXT ("wininet.dll"), 0, 
     dwSize, (LPVOID) lpBuffer) )
{
   cerr << "GetFileVersionInfo failed: " 
   << GetLastError() << endl;
   return 0;
}
LPDWORD lpdwLangCp;

if (!VerQueryValue(lpBuffer, TEXT("\\VarFileInfo\\Translation"), 
     (LPVOID*) &lpdwLangCp, &dwUint) ) 
{
   cerr << "VerQueryValue failed: " << GetLastError() << endl;
   return 0;
}
TCHAR     szLangCp[9];
wsprintf( szLangCp, TEXT ("%08X"),SWAPWORDS( *lpdwLangCp ));
TCHAR SubBlock [2048];
wsprintf( SubBlock, TEXT("\\StringFileInfo\\%s\\FileVersion"), szLangCp );

if (!VerQueryValue(lpBuffer, SubBlock,  (LPVOID*)&Buffer, &dwUint) ) 
{
   cerr << "No file version info available" << endl;
   return 0;
}
else
  cout << "File Version: " << Buffer << endl;
wsprintf( SubBlock, TEXT("\\StringFileInfo\\%s\\ProductVersion"), 
          szLangCp );
if (!VerQueryValue(lpBuffer, SubBlock,  (LPVOID*)&Buffer, &dwUint) ) 
{
   cerr << "No produce version info available" << endl;
   return 0;
}
else
   cout << "Product Version: " << Buffer << endl;

wsprintf( SubBlock, TEXT("\\StringFileInfo\\%s\\FileDescription"), 
        szLangCp );
if (!VerQueryValue(lpBuffer, SubBlock,  (LPVOID*)&Buffer, &dwUint) ) 
{
   cerr << "No File Description info available" << endl;
   return 0;
}
else
   cout << "File Description: " << Buffer << endl;

delete [] lpBuffer;