Refreshing a QR preview

I have made a custom QuickReport preview form that contains controls which
change the underlying dataset on which what is being shown in the preview is
based. When the user manipulates these controls and thus change the dataset,
I want the preview to reflect the new dataset contents. I have not been able
to figure out how to do this, short of destroying and completely recreating
the entire preview. Does anyone have any ideas?

Thanks a lot,

Steve C.