屏幕捕捉程序，可以捕捉整个屏幕、屏幕的一部分、窗口。捕捉的内容可以保存成BMP文件。这个程序演示如何通过API调用将图形设备中的图像保存到Bitmap对象中。 -Screen capture program, you can capture the entire screen, part of the screen, window. Captured content can be saved as BMP file. This program demonstrates how to call API graphics device to save the image to the Bitmap object.