SCREEN('CopyWindow') wait for veritcal synch?

1
When an OffScreenWindow is copied to the monitor output (Screen 0), does
SCREEN('CopyWindow') wait for a vertical synch before changing the monitor
output? I hope I posed the question correctly. I am asking on the behalf of
someone else, and he referred to the RSVP visual stimulus software which he said
does wait for a vertical synch signal before changing the display. Thanks for
any help you can offer.

- Dan
2
>When an OffScreenWindow is copied to the monitor output (Screen 0), does
>SCREEN('CopyWindow') wait for a vertical synch before changing the monitor
>output? I hope I posed the question correctly. I am asking on the behalf of
>someone else, and he referred to the RSVP visual stimulus software
>which he said
>does wait for a vertical synch signal before changing the display. Thanks for
>any help you can offer.

Doesn't wait. But you can code

SCREEN(w,'WaitBlanking'); SCREEN(w,'CopyWindow',...);

to achieve the desired effect.