BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  OnResize flickering...          BorlandTalk.com Forum Index -> Delphi VCL Components Writing View previous topic :: View next topic   Author Message Ugo Galbiati Guest Posted: Fri Nov 07, 2003 11:20 am    Post subject: OnResize flickering... Hi, I wrote a TCustomControl descendant. If I put my component in a form with Align=alClient, when I resize the form my component does flick, because my form paints gray on my component and the repaint my component. Does anyone know what can I do? Thanks, Ugo Galbiati. Back to top Yorai Aminov (TeamB) Guest Posted: Fri Nov 07, 2003 12:43 pm    Post subject: Re: OnResize flickering... On Fri, 7 Nov 2003 12:20:20 +0100, "Ugo Galbiati" <ugo.galbiati (AT) ebus (DOT) it> wrote: Quote: I wrote a TCustomControl descendant. If I put my component in a form with Align=alClient, when I resize the form my component does flick, because my form paints gray on my component and the repaint my component. The form does not repaint over TCustomControl descendants, since they have a window handle and the form does not paint over child windows. Try handling the WM_ERASEBKGND message in your custom control. The default handler clears the control's background. If your paint code completely covers the control, handle the WM_ERASEBKGND message by doing nothing and returning 1 to let Windows know the message has been handled. --- Yorai Aminov (TeamB) http://develop.shorterpath.com/yorai (TeamB cannot answer questions received via email.) 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