原创，实现了Windows抓屏和保存。其实编写时主要目的是测试StretchBlt函数，此函数在许多机器上运行有BUG，可以用这个程序测试。-originality, the realization of the Windows Capturing the Screen and preservation. In fact, the main purpose of writing is to test StretchBlt function, this function in many machi