fire event if screensaver starts

[sanjana]

hi i want to fire an event if the screen saver starts up
i have done it using a timer tick event where i have used the api
function to detect if screensaver has started..but this means
continuous polling at each timer click..

private void tick(object sender, System.EventArg s e)
{
const int SPI_GETSCREENSA VERRUNNING = 114;
int screenSaverRunn ing = -1;
// is the screen saver running?

int ok = SystemParameter sInfo(SPI_GETSC REENSAVERRUNNIN G, 0, ref
screenSaverRunn ing, 0);

if (ok == 0)
{
Console.WriteLi ne("Call to SystemParameter sInfo failed.");

}
if (screenSaverRun ning != 0)
{
// screen saver is running
MessageBox.Show ("screensave r runs");

}
else
{
}
}





is there a better way of doing something like no use of timer..
i want someting like-- if screensaver starts then a event gets fired
and if screen saver stops another event gets fired..this wud avoid
getting in the loop of timer tick event..
So my question is "is it possible to just fire events if screen saver
starts or stops without using timer ??"

[Larry Lard]

Re: fire event if screensaver starts


sanjana wrote:[color=blue]
> hi i want to fire an event if the screen saver starts up[/color]

There doesn't seem to be a Framework way of dealing with this, which
means you're going to have to do it the old-fashioned way.

Note that there isn't normally a global message sent when the
screensaver starts - only the active top level window gets a
WM_SYSCOMMAND message, with wParam set to SC_SCREENSAVE. So to be
notified of screensaver startup whether you are the active top level
window or not, you need to create a hook that catches that message then
sends a broadcast message of your own to all top level windows.

The full info is here in this Ask Dr GUI #48 article from way back:

<http://msdn.microsoft. com/library/default.asp?url =/archive/en-us/dnaraskdr/html/drgui48.asp>

The other alternative, as you have found, is to poll
SystemParameter sInfo.

--
Larry Lard
Replies to group please

[Ignacio Machin \( .NET/ C# MVP \)]

Re: fire event if screensaver starts

Hi,

http://dotnet.mvps.org/dotnet/samples/operatingsystem/

There you will find a demo, it's in german or something like that, but the
code is easy to understand :)

I never used it though.


cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation



"sanjana" <sudnya@gmail.c om> wrote in message
news:1123061947 .230973.80570@g 14g2000cwa.goog legroups.com...[color=blue]
> hi i want to fire an event if the screen saver starts up
> i have done it using a timer tick event where i have used the api
> function to detect if screensaver has started..but this means
> continuous polling at each timer click..
>
> private void tick(object sender, System.EventArg s e)
> {
> const int SPI_GETSCREENSA VERRUNNING = 114;
> int screenSaverRunn ing = -1;
> // is the screen saver running?
>
> int ok = SystemParameter sInfo(SPI_GETSC REENSAVERRUNNIN G, 0, ref
> screenSaverRunn ing, 0);
>
> if (ok == 0)
> {
> Console.WriteLi ne("Call to SystemParameter sInfo failed.");
>
> }
> if (screenSaverRun ning != 0)
> {
> // screen saver is running
> MessageBox.Show ("screensave r runs");
>
> }
> else
> {
> }
> }
>
>
>
>
>
> is there a better way of doing something like no use of timer..
> i want someting like-- if screensaver starts then a event gets fired
> and if screen saver stops another event gets fired..this wud avoid
> getting in the loop of timer tick event..
> So my question is "is it possible to just fire events if screen saver
> starts or stops without using timer ??"
>[/color]

[sanjana]

Re: fire event if screensaver starts

hi there
thanx a lot ..it worked:)


Ignacio Machin ( .NET/ C# MVP ) wrote:[color=blue]
> Hi,
>
> http://dotnet.mvps.org/dotnet/samples/operatingsystem/
>
> There you will find a demo, it's in german or something like that, but the
> code is easy to understand :)
>
> I never used it though.
>
>
> cheers,
>
> --
> Ignacio Machin,
> ignacio.machin AT dot.state.fl.us
> Florida Department Of Transportation
>
>
>
> "sanjana" <sudnya@gmail.c om> wrote in message
> news:1123061947 .230973.80570@g 14g2000cwa.goog legroups.com...[color=green]
> > hi i want to fire an event if the screen saver starts up
> > i have done it using a timer tick event where i have used the api
> > function to detect if screensaver has started..but this means
> > continuous polling at each timer click..
> >
> > private void tick(object sender, System.EventArg s e)
> > {
> > const int SPI_GETSCREENSA VERRUNNING = 114;
> > int screenSaverRunn ing = -1;
> > // is the screen saver running?
> >
> > int ok = SystemParameter sInfo(SPI_GETSC REENSAVERRUNNIN G, 0, ref
> > screenSaverRunn ing, 0);
> >
> > if (ok == 0)
> > {
> > Console.WriteLi ne("Call to SystemParameter sInfo failed.");
> >
> > }
> > if (screenSaverRun ning != 0)
> > {
> > // screen saver is running
> > MessageBox.Show ("screensave r runs");
> >
> > }
> > else
> > {
> > }
> > }
> >
> >
> >
> >
> >
> > is there a better way of doing something like no use of timer..
> > i want someting like-- if screensaver starts then a event gets fired
> > and if screen saver stops another event gets fired..this wud avoid
> > getting in the loop of timer tick event..
> > So my question is "is it possible to just fire events if screen saver
> > starts or stops without using timer ??"
> >[/color][/color]