gifShow256()

         Shows a 320x200x256 GIF on the screen

    Syntax:

         gifShow256 ( cFile ) -> lError

         cFile : Name of the GIF file

    Description:

         The GIF can be any size you want. Forget about the 64 kb
         limitation.

         It only works if a VGA card exists in the system.
         The function does not wait for a key, nor restores the video
         mode, so this is left to the user's responsibility. This is
         very useful when you want to show various GIF and you don't
         want to get text mode between one and the other.
         This function works best with GIF of less colors. It has
         been tested with GIFs of 320x200x32 and 320x200x64, also with
         320x200x256.

    Return:

         .T. if all has gone well or .F. if the file is not found or the
         GIF format is incorrect.

    Example:

         If IsVGA()
           nOldMode := SetVGA256()
           If gifShow256 ( "f:\xxx\giveme.gif" )
             Inkey(0)
           EndIf
           VideoMode ( nOldMode )
         EndIf