Important: The information in this document is obsolete and should not be used for new development.
HidePenTo give the graphics pen invisible ink (which means that pen drawing doesn't show on the screen), use the
HidePenprocedure decrements the
pnVisfield of the current graphics port. The
pnVisfield is initialized to 0 by the
pnVisis negative, the pen doesn't draw on the screen. The
pnVisfield keeps track of the number of times the pen has been hidden to compensate for nested calls to the
Every call to
HidePenshould be balanced by a subsequent call to
ShowPen, which is described next.
HidePenprocedure is called by the
OpenPolyroutines so that you can create regions, pictures, and polygons without drawing on the screen.