Thank you for writing.
You can use the RowUpdating
events of the DataAdapter.
Here is the MSDN article on Working with DataAdapter Events
I hope this will help. If you have further questions, feel free to ask.
the Telerik team
Q1’11 SP1 of RadControls for WinForms is available for download
; also available is the Q2'11 Roadmap
for Telerik Windows Forms controls.