Well, I have a class which magnifies the picture inside a picturebox. The problem is that it takes SOO much memory. So instead of magnifying the whole picture, I want to just magnify the visible part of it. For example let's say I have a picturebox on a form, and that the picturebox is larger than my form, so some of it is not visible on the screen, and some of it is visible..... how can I get the bounds of the visible part? I'm gussing there should be a way