I am using the RadWindow.Prompt for a user to rename files and folders. Is there a way for me to give the textbox that comes up in the Prompt the ability to ignore illegal filename characters? { '\\', '/', '*', '<', '>', ':', '"', '?', '|' }). Beyond Prompt I don't see how to access any other properties to do that. I want the same behavior as Windows Explorer where if an illegal character is entered, it is just ignored as if it wasn't typed.