Xibalba 1 Posted July 26, 2010 (edited) EDIT: I got no idea what went on in my mind here, I figured it all out by testing.Just ignoreI have an image beginning at 100 pixels from the left and 100 pixels from the top of my screen (the images first top-left pixel would be 101, 101).I want a checksum of my image.Which call is correct?$checksum = PixelChecksum(100, 100, 400, 400)or$checksum = PixelChecksum(99, 99, 399, 399)I'm asking because function calls like PixelGetColor(10, 100) in fact returns the 11th and 101st pixel ("the next one")Also, If I want default parameter values for step and hwnd, but mode 1, do I type:$checksum = PixelChecksum(100, 100, 400, 400, "", "", 1)?Thanks Edited July 26, 2010 by Xibalba Share this post Link to post Share on other sites