Emulate keyboard

How can I emulate keyboard in application running in background (hidden in tray). I want to press, hold, and relase keys on keyboard programatically. Also, I would like to开发者_如何学C move mouse around and be able to click.

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You can use SendInput API function

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You can also try the Windows.Forms.SendKeys API

Here is a How-To: How to: Simulate Mouse and Keyboard Events in Code