Vista slow dialog close

Hi,
I have a print screen command that brings up a dialog
to ask what printer to print to and then grabs a copy of
the screen and prints it. With Vista I have some that
are having a problem with the dialog still show (faded)
on top of the screen to print. I'm sure it's the animation
that slowly fades out a closed screen and I know I could
put a simple delay before I grab the screen, but is there
a way to tell when a dialog is gone?

Thanks,


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