VB NET Custom Control trashes when not focused

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I've created a VB NET Custom Control - a simple graph with some text.

Dragging another window over it trashes the text and lines I've drawn.
I'm using Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs) to paint the text and lines, and while focused, the control displays fine.

How do I prevent the trashing while it's not focused and I drag another window over it?

These seem to do nothing:
'g.Flush() doesn't help
'MyBase.OnPaint(e) doesn't help

Posted 17-Mar-11 8:21am

Phil Diver

Updated 17-Mar-11 8:32am

Sandeep Mewara

v3

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Sergey Alexandrovich Kryukov 17-Mar-11 14:35pm

Not enough information. Where is your code?
--SA

Sergey Alexandrovich Kryukov 17-Mar-11 14:37pm

Right, what you attempted to fix would not help. You need to show your OnPaint.
--SA

Henry Minute 17-Mar-11 15:14pm

In addition to the code, it might help if you describe what 'it trashes the text and lines I've drawn' means. Are you able to describe in what way it gets trashed?

Phil Diver 17-Mar-11 16:09pm

I mistakenly added "as a solution" - sorry.

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Phil Diver · Answer 1 · 2011-03-17T09:39:00

Here is a pic before and after dragging another window over it:
http://phactor.com/t.gif

My code:

    Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
        Dim r As System.Drawing.Rectangle = e.ClipRectangle
        Dim g As Graphics = e.Graphics
        Dim p As New Pen(Color.White)
        Dim hFont As IntPtr = GetStockObject(17)
        Dim hFFont As Font = Font.FromHfont(hFont)
        g.Clear(Color.FromArgb(80, 80, 80))
...  code that paints my text and lines
        g.Dispose()
    End Sub