[Qt-interest] qDebug output for Windows Service (no console)?

[Girish Ramakrishnan]

Windows Services do not have a session associated with them, right? If
so, DebugView has this 'Capture Global Win32' option to capture
debugging output from other sessions.

Another reason for failure is possibly that the integrity level of the
service and debugview are different (google for psexec to change it).

If any of the above worked, let me know :)

Girish

Jon Nicoll wrote:
> Hi all
> I'm a newcomer to Qt but a relatively experienced programmer, just a bit
> rusty under Win32. I'm working on a VS.NET project which can be built
> either as a console app, or as a windows service. I'm having trouble
> getting debug output when built as a service.
> 
> I'm using qDebug which according to the (Qt v4.5) documentation, "sends
> output to the console, if it is a console output, otherwise, to the
> debugger". This works fine when built as a console app, ie. I get debug
> output on the consile.
> 
> When built as a service, of course there is no console, and I don't want
> one either. I have installed SysInternals' DebugView, which I've used
> before, to capture the debug output. But I'm getting nothing coming up of
> the DebugView screen. I can generate 'test' debug messages using a
> separate app (using Python, as it happens) and they show up fine. I know
> that my Qt Service Application is generating messages as I can see its
> operation as a service. So I'm missing simething in the chain here ...
> 
> Various bits of documentation I've seen talk about adding CONFIG +=
> console in my '.pro' file. But I don't want a console! I have not got
> QT_NO_DEBUG_OUTPUT defined anywhere FWIW.
> 
> So, what else might I need to do to cause calls to qDebug to arrive at
> DebugView with my Windows Service build?
> 
> Thanks for any suggestions.
> 
> J^n