In this section:
%gp (Window Postion) takes two integers as arguments. When the window is created these integers are set to the screen x, y co-ordinates of the point where the %gp (Window Postion) format is used. Typically these values are used to position other windows over appropriate parts of a main window by using the %sp (Window Position) format. It is also used for child windows. Each time the window is moved or re-sized the x, y pair is updated.
For example:
WINAPP
INTEGER x,y,winio@
COMMON x,y
EXTERNAL myfunc
i=winio@('Press this button to conceal it! &')
i=winio@('%gp&',x,y)
i=winio@('%^bt[Press]',myfunc)
END
c---
INTEGER FUNCTION myfunc()
INTEGER x,y,winio@
COMMON x,y
c--- Window will be positioned relative to the button
c--- control in the main window
i=winio@('%spHidden!',x-5,y-5)
myfunc=1
END