Turn off the display on remote PC

Posted by concretemixer on Stack Overflow See other posts from Stack Overflow or by concretemixer
Published on 2010-05-26T07:46:41Z Indexed on 2010/05/26 7:51 UTC
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Filed under:

c++

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Windows

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drivers

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ioctl

Hello. I'm fixing some bugs in the application for remote control (remote desktop-like) for Windows. And there is a feature that you can blank screen on remote machine - all the programms keep running unaffected, but the person who looks into the display on remote PC sees nothing but black screen.

It is implemented by sending IoCtl request IOCTL_VIDEO_SET_OUTPUT_DEVICE_POWER_STATE, which is undocumented. And this request does not work on Vista and above.

Are there another ways to do what I want?

In fact, SendMessage(-1,WM_SOMMAND,SC_MONITORPOWER,2) does the trick, but screen turns back on if someone toches keyboard/mouse.

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