Also add the ontextchanged event in Text Box. I have an asp:TextBox with AutoCompleteExtender attached.The function Search() gets called when the user types in a word and presses enter.However, the enter key is not detected when the user hits the tab key to select one of the auto complete suggestionsAny ideas how I can fix this? Hi, I am trying to trigger ENTER effect on keypress on the textbox. But it just wont happen. Please advice.