Laptop/Desktop Sleep Events

I was wondering if there was an event that is triggered when a laptop or desktop goes into sleep mode.

An example 开发者_如何学编程would be: When a user is working on his/her laptop and he/she flips the monitor down, the laptop goes into sleep mode.

Or when a user goes to Start → Shutdown → Sleep.

Are there any events built into .NET that determine this?

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