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Our QA team recently discovered that if they paste a value into the Combobox, should a validation error occur, the new pasted value does not bind to the control when the page is displayed again with the validation summary for the user. We found it only works when typing the values in. My guess is that the Combobox only listens to the Keydown/Keypress event. The QA team is considering this a bug so is there any way to disable pasting or better yet, add an event for pasting?