For testing purposes I've created a form (not subclassed) with one button (not subclassed) and in the form init I have...

this.line(10,10,20,20)

When I run the form the line and button are there. As soon as the mouse cursor moves over the button the button disappears. If I move over where the button was it then appears but disappears when I move back off. There is no code in any button methods except "click" which does "thisform.release" and like I said, nothing is subclassed. Is using the line method on init not a good thing to do?