I'm considering using macperl to control visual perception experiments. Ideally, I'd like to do something like call an xcmd to put up a full-screen window, synch visual presentation to the vertical retrace of the monitor, and use the mac toolbox for drawing the presentation. I can do all of this outside macperl, the question is, can these be done within an xcmd (esp installing vbl task)? If so, are there any good examples available of xcmds within perl? Thanks, Rob ***** Want to unsubscribe from this list? ***** Send mail with body "unsubscribe" to mac-perl-request@iis.ee.ethz.ch