该程序运行时将桌面用定义的窗口覆盖，显示定义的图象。该程序的图象是不断的画线条，到100根后清除重新画，直到关闭窗口或结束程序运行。-running at the desktop with the definition of window covering, the definition images show. The program, the image is constantly painting lines, to 100 after the removal of re-painting, or window closed until the end of running.