How to copy all the pixels in a circle on a BITMAP image and paste to another spot on the image? [closed]

Question

I am trying to copy an area (circle) on an image to another part of the image. (Like shown below)

Something similar is the CopyRect procedure. The only difference is the shape.

Answer 1

• Create clipping region (CreateEllipticRgn here, CombineRgn for more complex figures)
• Select it (SelectClipRgn) in destination device context (Canvas.handle).
• Copy rectangle containing needed fragment. Parts outside clip region remain the same.
• Remove clipping region