Progress bar in sheet

[Sarah Reichelt]

Hi All,

I have a project with a few rather lengthy operations during which I 
use a progress bar. This all works fine - I have a separate stack that 
appears with a text message and a progress bar and it all looks good. 
BUT - I would like this stack to appear as a sheet (Mac OS X only). I 
changed it to open the stack as a sheet but sheets are modal (or 
nearly), so my handler stopped completely until I managed to close the 
sheet after which it continued happily.

Is there any way I can open a sheet but still have the calling handler 
continue?

TIA,
Sarah