jClick()

         Indicates if any button of the joystick has been pressed

    Syntax:

         jClick() -> lPush

    Description:

         Indicates if any button of the joystick has been pressed. To
         determine which has been used jButton1() and jButton2().

    Return:

         A logic value indicating if any button has been pressed.

    Example:

         If jClick()
           Warning ( "Buttons 1 or/and 2 are down" )
         EndIf