Have a look at this... http://support.microsoft.com/kb/318781
or http://support.microsoft.com/kb/315725 -----Original Message----- From: delphi-boun...@delphi.org.nz [mailto:delphi-boun...@delphi.org.nz] On Behalf Of John Bird Sent: Wednesday, 10 June 2009 4:40 p.m. To: NZ Borland Developers Group - Delphi List Subject: Re: [DUG] Detecting screensaver This time I let the screen saver kick in properly, the SystemParametersInfo(SPI_SCREENSAVERRUNNING does not work as far as I can see... I found more references http://www.answers.com/topic/systemparametersinfo "SPI_SCREENSAVERRUNNING Windows 95 only: Used internally; applications should not use this flag." Still stuck! John ----- Original Message ----- From: "Conor Boyd" <conor.b...@trimble.co.nz> To: "NZ Borland Developers Group - Delphi List" <delphi@delphi.org.nz> Sent: Wednesday, June 10, 2009 4:04 PM Subject: Re: [DUG] Detecting screensaver > Wouldn't surprise me if the preview button doesn't exhibit the same > behaviour. > > Screensavers have to be written to respond explicitly to being run in > preview mode (they basically have to parent themselves to the window > handle of the preview window which is passed to them when they're > executed in Preview mode). > > I believe your test is the correct approach, John (as backed up here: > http://stackoverflow.com/questions/510734/how-to-determine-that-a-screen > saver-is-running and with my own experience of writing a screensaver in > Delphi). > > Rather than using the Preview button, you could easily rustle up a > little utility to kick the screensaver into life by broadcasting the > appropriate window message: > Perform(WM_SYSCOMMAND, SC_SCREENSAVE, 0 ); > > HTH, > > Conor > > -----Original Message----- > From: delphi-boun...@delphi.org.nz [mailto:delphi-boun...@delphi.org.nz] > On Behalf Of John Bird > Sent: Wednesday, 10 June 2009 3:38 p.m. > To: NZ Borland Developers Group - Delphi List > Subject: Re: [DUG] Detecting screensaver > > I have seen that variant, but from what I saw this detects the > screensaver is set, not that it is active? > >>From the D7 win32 help: > > "SPI_GETSCREENSAVEACTIVE Determines whether screen saving is enabled. > The pvParam parameter must point to a BOOL variable that receives TRUE > if enabled, or FALSE otherwise." > > In my tests the above always returns true, as I do have a screen saver > enabled, and it does not return a changing status if the screen saver is > on at the moment or not. (I was using the control panel screen saver > preview button to check this). > > I am trying to detect if a screensaver is currently actually running > > John > >> I'm using SystemParametersInfo(SPI_GETSCREENSAVEACTIVE, 0, >> @ATScreenSaverOn, 0); It works on Vista here >> >> Paul >> >> ----- Original Message ----- >> From: "John Bird" <johnkb...@paradise.net.nz> >> To: "NZ Borland Developers Group - Delphi List" <delphi@delphi.org.nz> >> Sent: Tuesday, June 09, 2009 7:30 AM >> Subject: [DUG] Detecting screensaver >> >> >>> Does anyone know a reliable way to detect if the screensaver is on? >>> The way I have found references to on the web >>> >>> SystemParametersInfo(SPI_GETSCREENSAVERRUNNING, 0, @ATScreenSaverOn, >>> 0); >>> >>> Note this is documented as Windows 95 only, which I am guessing why >>> it doesn't work (XP/Vista) >>> >>> The only other way I can think of is to try to find the full name of >>> the foreground program and see if it has a .SCR extension, but I am >>> not confident that would work. >>> >>> John >>> >>> _______________________________________________ >>> NZ Borland Developers Group - Delphi mailing list >>> Post: delphi@delphi.org.nz >>> Admin: http://delphi.org.nz/mailman/listinfo/delphi >>> Unsubscribe: send an email to delphi-requ...@delphi.org.nz with > Subject: >>> unsubscribe >>> >>> >> >> _______________________________________________ >> NZ Borland Developers Group - Delphi mailing list >> Post: delphi@delphi.org.nz >> Admin: http://delphi.org.nz/mailman/listinfo/delphi >> Unsubscribe: send an email to delphi-requ...@delphi.org.nz with > Subject: >> unsubscribe > > > _______________________________________________ > NZ Borland Developers Group - Delphi mailing list > Post: delphi@delphi.org.nz > Admin: http://delphi.org.nz/mailman/listinfo/delphi > Unsubscribe: send an email to delphi-requ...@delphi.org.nz with Subject: > unsubscribe > > _______________________________________________ > NZ Borland Developers Group - Delphi mailing list > Post: delphi@delphi.org.nz > Admin: http://delphi.org.nz/mailman/listinfo/delphi > Unsubscribe: send an email to delphi-requ...@delphi.org.nz with Subject: > unsubscribe _______________________________________________ NZ Borland Developers Group - Delphi mailing list Post: delphi@delphi.org.nz Admin: http://delphi.org.nz/mailman/listinfo/delphi Unsubscribe: send an email to delphi-requ...@delphi.org.nz with Subject: unsubscribe _______________________________________________ NZ Borland Developers Group - Delphi mailing list Post: delphi@delphi.org.nz Admin: http://delphi.org.nz/mailman/listinfo/delphi Unsubscribe: send an email to delphi-requ...@delphi.org.nz with Subject: unsubscribe
