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activating screensaver on host from the server

Posted on 2002-04-08
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Last Modified: 2010-04-04
which command can I use in Delphi to activate the screensaver on client machines from the server?
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Question by:aussie_guy_nik
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Expert Comment

by:ginsonic
ID: 6925676
listening
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Expert Comment

by:classics
ID: 6927527
You will need to listen on a socket on each client machine.  Then have the server send the client a special message of whatever kind you like, then once the client gets it, trigger:

PostMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_SCREENSAVE, 0);

To start the local screensaver.
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ginsonic earned 400 total points
ID: 6927881
Read at http://www.delphi3000.com/articles/article_3072.asp the 'Shutting down a machine acrosa a network'.
This sample explaine how to send a command over a net.

Replace :

if Incomming = 'S' then // Shutdown Protocol
    ExitWindowsEx( EWX_FORCE or EWX_SHUTDOWN, 0 );

with

if Incomming = 'S' then // ScreenSaver Protocol
    PostMessage(GetDesktopWindow, WM_SYSCOMMAND, SC_SCREENSAVE, 0);




 Or:
SendMessage(handle, wm_syscommand, SC_SCREENSAVE, 0);
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Expert Comment

by:ginsonic
ID: 6936475
aussie_guy_nik ,
Any comment ?
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