[plt-scheme] Continuous update sliders ...

Hi,

I need some help with the slider% class. Much appreciate any tips.

The slider% class behaves modally as it stands - i.e. between mouse-down
and mouse-up on the slider control, the main event loop does not get  
to run.
How do I configure slider% such that I can twiddle it without pausing  
the
main event loop between mouse-down and mouse-up?

Cheers,
-Kumar