这是一个Win32程序,它只是展示了如何在一个窗口中画线。基本上,你画一条线,点击某个窗口和按钮被按下时,只需将鼠标移动到一个新位置,然后释放按钮-This is a Win32 program, it just shows how to draw a line in a window. Basically, you draw a line, click on a window and a button is pressed, simply move the mouse to a new loc