gifShow256()

         Shows a 320x200x256 GIF on the screen

    Syntax:

         gifShow256 ( cFile ) -> lError

         cFile : Name of the GIF file

    Description:

         The GIF can be the 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 under 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 properly with GIF of less colours. It has
         been tested with GIFs of 320x200x32 and 320x200x64, apart from
         320x200x256.

    Return:

         .T. if all has gone well or .F. if the file is not found, the
         system does not have VGA or the GIF format is incorrect.

    Example:

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