Simple drawing question

[NicoVB]

  button1_Click      

pnlLinks.Invalidate()
Dim i As Object
For each i In concoll
 i.BackColor = Color.Transparent
Next


Dim g As Graphics
        g = pnlLinks.CreateGraphics
        g.FillRectangle(New SolidBrush(ColorTranslator.FromHtml("#003366")), rect)
        g.DrawRectangle(New Pen(ColorTranslator.FromHtml("#99FF00")), rect)
        CTL.BackColor = ColorTranslator.FromHtml("#003366")
        CType(CTL.Tag, Panel).BackColor = ColorTranslator.FromHtml("#003366")
        g.Dispose()

This is the code I use for my drawing of a rectangle. But what happens: I can see that there is drawn a rectangle one millisecond, but the rectangle disappears instantly. Why is that??

 

[NicoVB]

This is really easy I think. Im just doing something very simple wrong. What is it?

 

[Volte]

You need to put all drawing code in your Paint event, otherwise it will simply be painted over as soon as you draw on it.

If you want to force the control to redraw itself do this:

[i]Control[/i].Invalidate()

 

[Hamburger1984]

Wrote a Testapp... (see attachment)

 

[NicoVB]

Thank you guys for your valuable information!!!