$WW,1$To create a ZenithOS graphic ctrl, you define callback functions and insert a $LK,"CCtrl",A="MN:CCtrl"$ structure in the $LK,"CTask",A="MN:CTask"$ queue.  See $LK,"::/Demo/Graphics/Slider.CC"$, $LK,"::/Demo/Graphics/ScrollBars.CC"$ and $LK,"TermBttnNew",A="FF:::/Zenith/WallPaper.CC,TermBttnNew"$.  There is a template-code ctrl generator, if you press $FG,2$<CTRL-SHIFT-L>$FG$.