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Re It not all I want, I need when I change text in text box, the message fire immediately, such as event TEXT_CHANGED. when validated dataAdapter, event fire after text box loss focus.

I have a textbox binding with DB. How I can show a message "Database changing..." when textbox.text change ?? The message is only called when dataset change, and each time the datase binding with the textbox change then the message is showed. Help me please, thanks.