i want to write my own control etc.. So i need to put an userobject a in an userobject b and then put the userobject b on a window.
A userobject a could be, line, rectangle, ellipse, buttons etc.. I know the function openuserobject() but that only works with window! How could i put for example a line on userobject b and to vies it on userobject b and then view the hole object in a window?