Peter
Wed May 12 11:41:05 CDT 2004
Thanks for the replies Alex and Peter!
So now I know this way of calling peghelp should be safe, now to the
"actual" problem :)
I think I will create a new thread for this as there is quite a lot of
information and the topic is slightly different. Please read "What does this
error mean?"
thanks again guys!!
// Peter
"Peter Foot [MVP]" <feedback@nospam-inthehand.com> wrote in message
news:%23zuiOxDOEHA.1616@TK2MSFTNGP12.phx.gbl...
> In the case of peghelp.exe this is perfectly safe. The application only
> allows one running instance and will switch to the file/topic specified in
> the argument. This is a perfectly acceptable (only way) of
programmatically
> bringing up different help topics based on the context of your
application -
> native applications will do just the same.
>
> For example you may use a different topic per form, or store the topic
name
> in a variable which you can change based on the current options set by the
> user. How you choose this depends entirely on your requirements. If you
pass
> in the topic name which is currently open in peghelp, then you will bring
> the help window to the front.
>
> Peter
>
> --
> Peter Foot
> Windows Embedded MVP
> www.inthehand.com | www.opennetcf.org
>
> "Paul G. Tobey [eMVP]" <ptobey_no_spam@instrument_no_spam.com> wrote in
> message news:u269cnDOEHA.3300@TK2MSFTNGP09.phx.gbl...
> >I guess that what's confusing is that I don't understand what you are
> >really
> > trying to achieve. You have an instance of peghelp running and you want
> > to
> > change which page is displayed by it in response to some sort of user
> > action?
> >
> > I don't have a PPC, so I don't know what would happen, but unless the
> > application itself makes sure that there is only one instance of it
> > running,
> > you can run as many as you have process slots and memory for, in the
> > general
> > Windows CE case...
> >
> > Paul T.
> >
> > "Peter B" <peter@data.se> wrote in message
> > news:OlSeSeDOEHA.556@TK2MSFTNGP10.phx.gbl...
> >> Hi Paul, thanks for your reply!
> >>
> >> No I don't want 30 copies of peghelp running :-) I might have missed to
> >> inform you that I am using PocketPC2003 and I was under the impression
> > that
> >> you can run only one instance of a application at any time?!? This may
be
> > a
> >> .NET Compact Framework feature though, and since I am calling native
code
> > it
> >> might not apply here...?
> >>
> >> I could of course save the IntPtr to the first process I create and
reuse
> >> it. I'll have a look to see if there is a method that can take the
IntPtr
> >> and an argument to reuse the same PegHelp instance (something like
> >> RecallProcess( IntPtr, argument)).
> >>
> >> / Peter
> >>
> >>
> >> "Paul G. Tobey [eMVP]" <ptobey_no_spam@instrument_no_spam.com> wrote in
> >> message news:e80hPQDOEHA.3596@tk2msftngp13.phx.gbl...
> >> > Well, there's a limit in Windows CE on the number of running
processes,
> > so
> >> > it will fail eventually, if some of those instances don't exit. You
> >> > can
> >> > probably read on MSDN some of the general information about the OS.
> >> > You
> >> > don't really want to have 20 or 30 copies of peghelp running, do you?
> >> >
> >> > Paul T.
> >> >
> >> > "Peter B" <peter@data.se> wrote in message
> >> > news:%23zDbGKDOEHA.2740@TK2MSFTNGP11.phx.gbl...
> >> > > Is it ok to call CreateProcess(...) (from OpenNETCF.org WinAPI)
> >> repeatedly
> >> > > with the same application as argument. I am starting peghelp.exe
from
> >> > > different forms (via a global class). I.e. what happens when I do
> > this?
> >> > Any
> >> > > good information I could read up on?
> >> > >
> >> > > The global method I use from different forms:
> >> > > public static void ShowHelp( string tag )
> >> > > {
> >> > > OpenNETCF.WinAPI.Core.CreateProcess("peghelp.exe", tag);
> >> > > }
> >> > >
> >> > > regards,
> >> > >
> >> > > Peter
> >> > >
> >> > >
> >> >
> >> >
> >>
> >>
> >
> >
>
>