老板来了，同时按下鼠标左键和右键，即可隐藏IE和QQ的所有窗口，然后再次 按下鼠标左键和右键，又显示出来。-The boss has come, at the same time by pressing the left mouse button and right, you can hide all IE windows and QQ, and then again press the left mouse button and right, but also displayed.