RE: A puzzling problem with graphics painting and Alt-Tab

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

From: Ying-Shen Yu[MSFT] (v-yiy_at_online.microsoft.com)
Date: 07/20/04 

Date: Tue, 20 Jul 2004 05:50:58 GMT

Hi Tom,

I did a quick test using the following code snippet. When running it on my
Windows XP system, I pressed alt-tab and hold down the alt key to keep the
switch window visible, the Timer event handler still updated the screen
properly.
<code>
Color[] clr = { Color.Red , Color.Pink,Color.Yellow,
Color.Green,Color.Purple, Color.Blue};
int idx = 0;
private void timer1_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
        using (Graphics graphics = panel1.CreateGraphics())
        {
                Color c = clr [ idx++ % clr.Length ];
                using (Brush brush = new SolidBrush( c ))
                {
                        graphics.FillRectangle ( brush, panel1.ClientRectangle );
                }
        }
}
</code>

Could you make a simple program to reproduce this problem, so we can look
into it further.

Thanks!

Best regards,

Ying-Shen Yu [MSFT]
Microsoft Community Support
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