Running a simple GUI app

Christopher Faylor
Mon Aug 18 18:50:00 GMT 2008

On Mon, Aug 18, 2008 at 06:42:58PM -0000, John Emmas wrote:
> Sorry Phil if my questions seem 'lame'.  I should have explained that I 
> only
> installed Cygwin this morning so I'm by no means up to speed with the
> concepts or terminology.
> Anyway, I managed to arrange Windows so that it now starts X at boot up.
> This means that I can use a (DOS) console window to navigate to the
> appropriate directory, type 'HelloWorld' and my HelloWorld app launches
> with X just running silently in the background.  That's a lot slicker than
> the procedure I was using a few hours ago.  Thanks for the suggestion.
> What's strange though is that I can't just double-click on the app's icon
> and launch it.  There's a (slim) chance that this could be a Windows 
> problem
> but I've never known any other Windows app that can be started from a
> command line but can't be started by clicking its icon.  Any ideas?

X apps use a DISPLAY environment variable to denote which display they
should attach to.  It's possible that all that you need to do is add
DISPLAY=:0 to your environment via the Control Panel->Systems setting.


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