This a dirty rectangle technology demonstration demo the source code. A sub-region to the dirty rectangle to update the canvas, and as a demonstration to draw a rectangle for the instance.

dirtyrect\box.c
.........\box.h
.........\canvas.c
.........\canvas.h
.........\gdi.c
.........\gdi.h
.........\readme.txt
.........\test.c
.........\~
dirtyrect

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