gifY()

         Returns the heigth of a GIF

    Syntax:

         gifX ( cFile ) -> nLong

         cFile : Name of the GIF file

    Description:


         This function returns the heigth, in pixels, of the GIF image.

    Return:

         A numeric value indicating the number of pixels of heigth or Nil
         if the file does not have GIF format.

    Example:

         ? gifY ( "c:\xx\giveme.gif" )