how to capture key value in item event

hi

i have apice of code in item event that will trigger when "key down event is performed." but i want that event to fire only when ENTER button is presed. how to handle this event.. i thought of doing to write the condition for ASCII value of ENTER button on keyboard..

will this work? and if yes, can u plz send me some sample code to set the condition for Firing the ENTER button on key board...

thanks in advance