Hi Gary C,
Thanks for contacting us.
In the Q3 2009 release of RadControls
we have introduces some improvements in the drop-down mechanism of the RadComboBox
control which also addressed some issues.
In your case my advice would be to either use the new DropDownOpening
event or directly set the DropDownWidth
property when initializing the RadComboBox
I hope this is helpful. You can write back anytime you need further assistance.
All the best,
the Telerik team