Hi all

I'm porting an application from OS9 and hit something I don't know  
how to fix.

The application presents visual images for very short durations (eg.  
10ms). In OS9 I drew the image to a gworld and copied it to the  
monitor in sych with the monitor refresh. Hence you could display an  
image for a single refresh (or some multiple of it). They are very  
simple images (eg white disk on black background, black text on white  
background)

In OSX I'm not sure how to achieve the same objective. At the moment  
every now and then I loose a presentation - that is the white disk  
does not flash when expected. Is this possible in OSX?

Cheers

David