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Problem receiving key events in CLI created window

O.K., I have a very frustrating problem with a piece of long
standing code which has stopped working on the latest version
of OSX. The code worked fine on the public beta (last version I
had before Jaguar) and also on Rhapsody and OpenStep before that.

Which is kind of frustrating.

I have acommandline program which, when run, opens a window and draws into
it. It also receives events in that window using this:

event = [NSApp nextEventMatchingMask:NSAnyEventMask
untilDate:the_past inMode:NSDefaultRunLoopMode dequeue:YES];

where 'the_past' is set to [NSDate distantPast] so that the call returns
immediately. For key events I process them myself, all other events are
then passed on using [NSApp sendEvent:event];

When I run the program I find that key events are still captured by the
terminal! Even with the window key and to the front, if I type then
the keypresses appear in the shell window the application is running from.

I am completely at a loss as to how to fix this, or what has changed to make
this suddenly stop working after five years!

All suggestions are very welcome...

-bat.
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