VB 图像裁切，显示裁切框，本例只是介绍了一种方法，许多地方还有待完善，测试时要先导入一张图片，程序运行后也要导入图片。-VB Image cropped to show crop box, in this case only describes a method, many places have yet to be improved, the test must first import a picture, the program should run into pictures.