NAME: KeyPressed

     USE: Keypressed is a function to check the keyboard buffer to
          determine if any characters are waiting to be processed.
          It will return TRUE if a key has been pressed and will not
          remove its value from the buffer.  It does not check the
          status of the shift, scroll lock, num lock, alt, or
          control keys.

     DEPENDENCY:  The CRT unit must be used placed in the uses section.

     SYNTAX: KeyPressed