Thanks for writing to us about that. I suppose you are using Visual Basic - in that case we follow the convention as described here: http://msdn.microsoft.com/en-us/library/h7a2kh64(v=vs.90).aspx.
Currently you can't change that. The best handling of your case would be to add a naming convention for event invocators and the command will follow it. We logged that and I added a PITS item for you to track its progress. You also receive some Telerik Points.
the Telerik team
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