I have used a png with transparent background in a C# form.
I followed the question at Transparent images with C# WinForms and its accepted answer does excatly what I want except the dragging part. I use a Form as the hosting control.
The problem is when I drag the control, it does not repaint the background, thus the transparency goes and the very first occuring background filling the control.
I tried using Invalidate() inside OnMove override. But it didn t work for me.
I think clearing the existing background and redrawing the image at drag would do what I want.
But how to achieve it?
Thank you for any help
