Copying and pasting a non-rectangular area of screen

[Petr]

The way I'd go about this would be to :

1) Make a _CopyImage of the existing screen.
2) Set _DontBlend on that CopyImage
3) When clicking the mouse, I'd draw a line from point A to point B in COLOR 0 (no alpha, no red, no green, no blue.)   Do this until you enclose the area you want to copy.  Keep the max top/left/bottom/right coordinates to make a box later.
4) PAINT that screen in COLOR 0, outside the box to keep.
5) Turn _Blend on for that CopyImage
6) You can now _PutImage that top/left/bottom/right box onto the main screen.
7) Freeimage that _CopyImage

I will try it as you describe. Thanks for the advice.