Introduction - If you have any usage issues, please Google them yourself
This is a simple drawing program, all the system calls the brush and the brush tool, you can draw some simple graphics (such as a pencil features, eraser, round, straight line, polyline, etc.), you can set some graphics attributes, such as the fill style, line, etc.! There is no drawing Bezier curve function, you can store graphics! Function is relatively simple! In addition, since doing double-buffering, so I paint nothing when the screen flashes! To achieve the function is not too complicated, just some basic functions!