Hi,
I'm developing a class derived from Panel Control. It's Transparent, moveable and resizeable. When moving or resizing (onMouseMove event)it draws a Temperory rectangle over the parent control.I
Adding a single control to a form from this class isn't a problem. But when I add multiple controls on a form I have a problem. IfI move a controlthe othersthat areadded laterare not painted.Let's say I have 3 controls If I move the third one everything is normal. If I move the second one the third doesn't paint during movement. If I move the first one the second and third don't paint..After the movement everything comes back.
I think the problem is my later added controls doesn't receive painting calls. I wonder is there a hierarchy according to adding order of controls.

Thanksadvance.

Transparency in Windows is faked by drawing the foreground of the container window as the background of the child control. That works just fine for single controls but falls apart when controls overlap each other, stacking effects don't work. Check this thread for a completely different approach. Follow the link in that post to get the important code.

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Hans Passant.

Thanks for comment.
But actually my problem is not just transparency. While a control is drawing a rectangle on parent form another controls that are added after this are not painted.

My code looks like this

public class MyControl : Panel

{

public MyControl()

{
SetStyle(ControlStyles.SupportsTransparentBackColor, true);
SetStyle(ControlStyles.Opaque, true);
this.SetStyle( ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint ,true);
}

protected override void OnPaint(PaintEventArgs e)

{
// Draw some graphics on this object
// Graphics g= e.Graphics
// ...................

if (IsSMoving)
{
Graphics g2 = this.Parent.CreateGraphics();

// g2.DrawRectangle(); Here we draw a temporary rectangle on parent (Form)
this.Parent.Invoke();
}
base.OnPaint(e);

}

}
}

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On a form I add some objects from this class. But if a control is moving the ones added later are not shown until it stops moving.