How does the computer send screenshots?

Generally, the shortcut key for computer screenshot is CTRL+ALT+A. Press the A key and then use the mouse to pull out the area that needs screenshot. After selection, double-click the left mouse button to finish, then go to the Start menu to find Notepad and right-click to paste it. Of course, you can also right-click and paste in the QQ chat box, or use the screenshot function of QQ chat. As for your mailing, I don't know where to send it, so I can't answer.