Re: [perl-win32-gui-hackers] [win32-gui] Re: Win32::GUI::Console

[Reini U. <ru...@x-...>]

2006/6/7, Robert May <rm...@po...>:
> Glenn Linderman wrote:
> > On approximately 6/6/2006 2:08 PM, came the following characters from
> > the keyboard of Robert May:
> >> Reini Urban wrote:
> >>> Robert May schrieb:
> >>> ...
> >>>> If only there was a way to ask AllocWindow() to create a hidden console,
> >>>> but I read that it's impossible.  (I do want to explore the possibility
> >>>> of using a global hook to see if I can catch one of the messages that
> >>>> happens early during window creation, and fiddle the WS_VISIBLE style,
> >>>> but I'm not hopeful!)
>
> I can confirm that as I read elsewhere, it does not seem possible to
> either subclass or hook (SetWindowsHookEx(WH_CBT, ...)) a console window.
>
> >>> You can create it offscreen, to the right or left.
> >>> So you can use CreateProcess() with
> >>> dwCreationFlags += CREATE_NEW_CONSOLE, instead of AllocConsole()
> >>>
> >>> And STARTUPINFO.dwX holds the offscreen position.
> >> Interesting idea, but I don't think I'm following you here.
> >> CreateProcess() will create me a new process, and I can't see how I'd
> >> read/write to that process's console from my perl script.
> >>
> >> Regards,
> >> Rob.
> >
> > It seems that Reini's idea might be useful to stop flashing consoles for
> > subprograms, but not for the original program?
>
> That was my thinking too - but perhaps Reini is
> hinting at something that I do not understand?

No, I mixed it up.
perl2app --gui / pp --gui  created apps, have no console.
So I create them with AllocConsole or CreateProcess and
redirect STDERR/STDOUT to this window, and display it only when requested.
To work around the flashing issue I can
1) create it only when requested, but then I loose the previous output,
2) or create it hidden or offscreen and show/move it when requested.
Menu: View - Messages...

But better is to create the app without --gui and hide the console as
discussed here.

> If you want to start a sub-process hidden, then
>    Win32::SetChildShowWindow(SW_HIDE);
> is probably easier :-)

Correct.

-- 
Reini Urban
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