主要功能：

1。使用鼠标任意拖动，在程序的小框架内进行画图。

2。使用橡皮擦的功能对话图的错误进行改正

3。将画过的图象保存为jpeg的格式

4。截取屏幕-main functions : 1. Drag the mouse arbitrary use of the procedures carried out within the framework of a small painting. 2. Use the attached map the functional dialogue corrected three errors. The painting will be kept as a jpeg image format 4. Interception screen