Re: Double Buffering and Initial Paint

From: Bob Powell [MVP] (bob_at__spamkiller_bobpowell.net)
Date: 04/16/04 

Date: Fri, 16 Apr 2004 23:04:25 +0200

AllPaintingInWMPaint prevents the OnEraseBackground event from firing so you
are responsible for clearing the control's surface.
Use e.Graphics.Clear(<somecolour>) in the OnPaint handler. 

-- 
Bob Powell [MVP]
Visual C#, System.Drawing
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"msnews.microsoft.com" <bkotch@liquidnet.com> wrote in message
news:e9Chcm%23IEHA.3712@TK2MSFTNGP09.phx.gbl...
> when I turn on double buffering ... I get the undesirable side effect that
> the control which is being double buffered momentarily has the same
> background as whatever the window popped up on top of. So for example, if
> the background is the desktop, the background of the control will
> momentarily is blue. (This is especially a problem in my app, b/c not all
> controls have double buffering turned on, so some come up white, and
others
> blue, blah!)
>
> After much experimenation ... this seems to be directly related to the
flag
>
> this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
> When this is set to false, flickering once again occurs, but the
background
> doesn't exhibit this undesirable initial transparency effect.
>
> So the question is ... is there a way NOT to have this background bleed
into
> my app, but STILL not have any flicker.
>
>
>
>

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