make the screen sleep

Hi, i need a something that can make the screen go to sleepmode (or make windows stop transmitt video signals) i searched a bit, but cant find anything.

so i decidet to register ant ask :P (it isn't for any malicious sowtwere, its for someone that wanna fake that his computer is off)

Thanks in advanced :)

Code:

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SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, lParam);

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http://www.codeproject.com/KB/system...ay_states.aspx

gg

THANKS!! now i need to find out how it works.... *clicks the link*