演示如何派生自己的STATIC类,并通过响应OnPaint消息来完成贴图-demonstrate how derivative their STATIC category, and by responding to news OnPaint completed mapping

一个利用WM_PAINT消息制作的绘图小程序，每点一次生成按钮将生成10个随机的点-A WM_PAINT message produced by the use of small graphics program, each point will generate a button to generate 10 random points