我用Win API编写的画板程序。

能够进行基本的图形绘制功能：直线，圆、矩形和多边形；
数据保存功能，能够把图形数据通过矢量保存到文件中；
简单的编辑功能：双击选中，利用键盘ael键和菜单项删除选中的图形元素；
能够从文件中加载保存的数据，并且能够进行基本的编辑操作；
可以进行对象的放大和缩小；
可以上下左右进行画板移动；
如果在一个计算机上运行两个程序实例，那么在任何一个程序中操作在另外的程序中都可以看到相同的操作结果，也就是程序之间具有通信的功能。 ,I use Win API procedures for the preparation of the drawing board.

To carry out the basic graphics rendering functions: linear, circular, rectangular and polygonal　
Data retention capabilities, be able to save vector graphics data to a file　
Simple editing features: Double-click the selected ael use the keyboard keys and menu item to delete the selected graphic elements　
Be able to save from the file to load data, and to carry out basic editing operations　
Object can zoom in and out　
Sketchpad can be moved around from top to bottom　
If a computer running two instances, then a program in any operating procedure in the other can see the results of the same operation, that is, procedures for communication between functions.