Re: Is Powerpoint still a single instance app?

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In article <ukDMwmcXFHA.1044@xxxxxxxxxxxxxxxxxxxx>, Howard Kaikow wrote:
> "Steve Rindsberg" <abuse@xxxxxxxxxxxxx> wrote in message
> news:VA.000016e2.8837ed55@xxxxxxxxxxxxxxxx
> > Still true. All versions from 97 on are devoutly single-instance.
>
> Should "devoutly" be "devilishly"?

<g>

That depends on whether you want to have multiple instances or to be certain of
which instance you have. ;-)

>
> > A few things that might help distinguish between a session you invoked
> from
> > scratch and a reference to an existing session:
> >
> > With app.PPT
> > if .Presentations.Count = 1 Then
> > if .Presentations(1).Path = "" and _
> > .Presentations(1).Name = "Presentation1" Then
> > ' it's your session or
> > ' somebody started PPT but hasn't done anything yet
> > End If
> > End if
> >
> > End With
>
> Ayup, I thought about those, but the real issue is control.
> If I decide that I own the session and nobody else is using powerpoint,
> there is still an instant or so, during which I'd be killing the critter and
> somebdy might have just started a session.

Point taken, and it'd be better to head that off at the pass if possible.
Still, in that case the worst that'd happen is that the new session wouldn't
start. I can't tell you how often I'm sure I doubleclicked something but got
no reaction, oh well, try again. Wouldn't this appear to be one of those? In
other words, it might be very mildly puzzling, surely far less than normal
Windows behavior can be, but wouldn't cause any loss of data.



>
> I run only in a single user environment, so I cannot test some concerns?
>
> Is the single instance of PowerPoint system wide, or is it on a desktop by
> desktop basis, on a multi-user system?
> If the latter, I could disable the desktop whilst I kill the critter.

It would almost have to be on a desktop by desktop basis, else PowerPoint would
be stumbling all over itself whenever two users had it active. Same would be
true of any app I'd think. Not so much true of the app, in fact, but a
question of whether Windows permits them to see one another. It'd have to be
keeping them all (and each user's session) in separate memory spaces wouldn't
it?

To be sure, that's speculation on my part.
-----------------------------------------
Steve Rindsberg, PPT MVP
PPT FAQ: www.pptfaq.com
PPTools: www.pptools.com
================================================


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