应用了opencv，打开指定的文件夹图形，图像格式不限，且大小可调-The application of opencv, open the folder specified graphics, image format open, and the size of adjustable

创建和显示CAD的Controlbar。内嵌一个对话框，可以响应控件消息。代码非常简洁，有注释，便于学习和理解。个人。-Create CAD controlbar.There is a Inner embedded dialog can respose.It is helpful to learn cad control bar and arx.