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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>I’m trying to use SenMessage() to turn the display on or off under program control of a console application. I got the function to work, and it turns off the display, but then the program just hangs. <o:p></o:p></p><p class=MsoNormal>Does anyone know what I am doing wrong?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Here’s my sample program<o:p></o:p></p><p class=MsoNormal>Program Displaycontrol;<o:p></o:p></p><p class=MsoNormal>Uses Windows;<o:p></o:p></p><p class=MsoNormal>Begin<o:p></o:p></p><p class=MsoNormal> Writeln('Turning Off Display');<o:p></o:p></p><p class=MsoNormal> SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, 2); //This seems to work, turning off my display<o:p></o:p></p><p class=MsoNormal> Writeln('Display is Off'); // This Writeln never happens. I need to force terminate the program.<o:p></o:p></p><p class=MsoNormal> sleep(10000);<o:p></o:p></p><p class=MsoNormal> Writeln('Turning On Display');<o:p></o:p></p><p class=MsoNormal> SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, -1);<o:p></o:p></p><p class=MsoNormal> Writeln('Display is On');<o:p></o:p></p><p class=MsoNormal>End.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>James<o:p></o:p></p></div></body></html>