Transparent Background on Controls

[RichardADL]

I have created a stretch handle control that contains a border and the eight handles and am able to display the background transparent successfully.

However, when i resize or move the control, the transparent background is not repainted leaving a trail of old paints (within the new bounds of the control only). I wish to have the background of the control permanently showing what is behind it (ie, transparent). The only way I have achieve this is to make the entire control (or just the background) not visible and then visible again, which cause major flicker. I have also tried to invalidate regions of the control (and the parent) and force repaints but it only appears to repaint correctly (ie, the transparency) when I make it not visible and then visible again.

Please help...

Regards, Richard

 

[aewarnick]

How are you making the control transparent? Are you overriding the OnPaint event and painting the ClientRectangle with a transparent SolidBrush? new SolidBrush(Color.FromArgb(0,0,0,0))

 

[Erikvandervelde]

Hi there.

Have you tried to set te resizeredraw property of the control to true?

Regards,

Erik