Yes, just keep in mind that you need to time your events well in the control
event hierarchy. Sometimes an action in a usercontrol that works when
embedded in a page may be a bit off when placed inside another user control.
For example, you pass data from a usercontrol to another one that will show
some more data. You click a link in the parent usercontrol to select a
different set of data to show in the child usercontrol, but the timing of
the events is off so the child usercontrol doesn't update properly and ends
up a step behind the parent.
Hope this helps,
Mark Fitzpatrick
Microsoft MVP - Expression