>My form contains a pageframe and among the different pages are several listboxes.
>Whenever I move the thumb of any of the listboxes, there is actually no scrolling until I actually let go of the mouse.
>I understand that the property involved is ContinuousScroll which should be set to .t., and that is the default. So why then does this not work?

Rich,

The ContinuousScroll property affects form scrolling only. There's no such property for listbox.