How to avoid screen flickering when showing form with user drawn controls?

Question

So the transparent background problem is solved. Now, every time I show the form (or have to have it repainted), I get a lot of flickering. Is there any way I can not update the screen until the paint event is complete, or any other way to stop the 1/2 second of flickering and flashing while all the objects are being painted?

ANSWER: Double buffering is the way to go. I was already double buffering on the control, but it has to be set on the form. I though double buffering only worked when you were subclassing OnPaint yourself.

score 10 · Accepted Answer · edited May 23 '17 at 11:44

10

Did you try setting the DoubleBuffered property for the form?

edited May 23 '17 at 11:44

Community

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answered Oct 21 '08 at 00:01

Gulzar Nazim

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score 5 · Answer 2 · answered Oct 21 '08 at 00:02

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Double Buffering might help, another thing you might want to try is:

SuspendLayout();

dostuffhere...

ResumeLayout();

answered Oct 21 '08 at 00:02

schmoopy

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DoubleBuffered _increases_ resource requirements, but is more likely to be effective. Suspend/ResumeLayout() _reduce_ resource requirements, but are less likely to be effective. – Joel Coehoorn Oct 21 '08 at 00:07

score 2 · Answer 3 · answered Oct 21 '08 at 00:02

2

Set the DoubleBuffered Property on the form.

answered Oct 21 '08 at 00:02

Kyle Trauberman

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How to avoid screen flickering when showing form with user drawn controls?

3 Answers3