IsFastGT()

         Determines if FAST.GT is linked

    Syntax:

         IsFastGT() -> lLinked

    Description:

         Determines if FAST.GT is linked.
         FAST.GT is a FAST.* software that allows Clipper standard
         programs running in graphic mode without additional changes to
         the source code.

    Return:

         A logic value.

    Example:

         If IsFastGT()
           ? "Oh!!! we are in graphic mode"
         EndIf