INFO: How the Accessibility RDK Determines the System Language.

MORE INFORMATION

The RDK compares the primary language ID [using the macro PRIMARYLANGID(lcid)] for the RDK (derived from Oleaccrc.dll) to the primary language ID for User.exe.

Below is a code snippet to extract the language information:

   #define NUM_TCHARS_NEEDED_FOR_BACKSLASH (1)
   #define NUM_TCHARS_NEEDED_FOR_NULL_TERM (1)
   #define BACKSLASH (TEXT("\\"))

   UINT nLenOfSysDirPath = 0;
   LPTSTR lpszSysDir = NULL;
   LPTSTR lpszSysFile = NULL;
   UINT nLen = 0;
   DWORD dwUseless = 0;
   LPVOID lpVersionData = NULL;
   DWORD dwSize = 0;
   LCID lcidUSER;
   TCHAR szUserLangName [64];

   nLen = GetSystemDirectory( NULL, 0 );
   nLenOfSysDirPath = nLen + NUM_TCHARS_NEEDED_FOR_BACKSLASH;
   lpszSysDir = (LPTSTR) LocalAlloc( LPTR, nLenOfSysDirPath *
   sizeof( TCHAR ) );
   GetSystemDirectory( lpszSysDir, nLen );
   if ( lstrcmp( (LPCTSTR) lpszSysDir[ lstrlen( lpszSysDir ) ], (LPCTSTR)
     BACKSLASH ) )
      lstrcat( lpszSysDir, (LPCTSTR) BACKSLASH );

   lstrcpy( lpszSysFile, (LPCTSTR) lpszSysDir );
   lstrcat( lpszSysFile, (LPCTSTR) TEXT("USER.EXE"));

   dwSize = GetFileVersionInfoSize(lpszSysFile,&dwUseless);
   if (dwSize)
   {
     lpVersionData = LocalAlloc(LPTR,(UINT)dwSize);
     if (GetFileVersionInfo(lpszSysFile,dwUseless,dwSize,lpVersionData))
     {
       if(VerQueryValue(lpVersionData,TEXT("\\VarFileInfo\\Translation"),
       (VOID**)&lpdwTrans, &cbTrans))
       {
        lcidUSER = LOWORD(lpdwTrans[0]);
       }
     } // end we got version data
    LocalFree((HLOCAL)lpVersionData);
   }

   VerLanguageName (lcidUSER,szUserLangName,sizeof(szUserLangName));
				

This information is pertinent to Windows 95, Windows 98 and Windows NT 4.0 Service Pack 4 and later versions.