Quote Originally Posted by sabeesh View Post
The probs is that, when I move the child window, then the old position of the window hold the picture of that child window. i think its, memory probs. But when we refresh the mainwindow it cleare that unwanted picture. So I need to refresh the screen when i move the child window.
The underlying window system will send paint events when a window underneath is exposed. You must be doing something weird. Do you have any custom widgets in your main window that show this garbage? Could we see the slot that is connected to the button?