Olof Lagerkvist  wrote in message
news:...
> Eric wrote:
> 
> > Olof Lagerkvist  wrote in message
news:...
> > 
> >>Eric wrote:
> >>
> >>
> >>>I want to use the RegisterServiceProcess API in both Win 98 and Win
> >>>NT, but Win NT seems to not support RegisterServiceProcess, is there
> >>>an alternative?
> >>
> >>If you have used RegisterServiceProcess() in Win 9x just to
prevent your 
> >>process from being displayed in the Task List, there is no
such thing in 
> >>Windows NT. Windows NT Task Manager always displays all processes 
> >>running on the system (except on Terminal Services, but that's another 
> >>story).
> > 
> >    I want my program not to show up in the Alt+Tab list and in the
> > Task Manager (or at least not under the Application tab in the Task
> > Manager). So isn't the best way to do is to register the program as a
> > service? If so, is there an API to do that in NT?
> 
> No, it is not the best way, it does not work that way at all in NT. 
> Everything displaying one or more top-level windows (windows without 
> owners) on the user's desktop will show when Alt+Tab is pressed or on 
> the applications tab in Task Manager. So, if you do not create any 
> windows or only windows with other applications' windows as owners your 
> application is not displayed there.
> 
> Beginning with Windows 2000 this has changed a little, not only real 
> top-level windows are displayed. E.g. open a properties dialog in the 
> Control Panel and press Alt+Tab, in NT 4 it is not displayed there but 
> in 2000 and later it is and I dont know exactly which windows are 
> displayed there in Windows 2000. Is there someone else who knows that?


   When I ran my program with all the forms invisible in Windows XP,
the program did not show up in the Alt-Tab list, but showed under the
Application tab in the Task Manager.

   Thank you for helping again!
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