Exodust

I have just started learning Visual C++, and I was trying to make a paint program, with some help from a book ofcourse. I managed to make one in which, the only features are draw freehand and erase. The problem is - Whenever I draw something and then resize the window, the drawing gets deleted. This doesn't happen while moving the window. I want to fix this. If someone knows, please help. I have attached all the files required. The program works like this-- Left mouse button to draw, right mouse button to erase. There is a premade cicle drawn in it, and if you erase this circle, and resize, it comes back. (Another problem)

Attached Files

painter.zip (2.4 KB, 12 views)

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Polyphemus_

I didn't look at your code, but I think you are drawing directly to the device context, which can be cleared at any time. I recommend creating a buffer where you store the actual painting, and on the WM_PAINT notification you draw it to the device context using bitblt.

Note that I'm assuming you are using the Windows API here.

Exodust

Yes, I'm using win32 api. And i'm drawing directly to the device context too. So how do I impliment the buffer thing and what is bitblt? Thanks for help.

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