I'm not for certain if I completely understand. My combo box, "CustomerType" has 4 choices; Existing, Potential, Lost, Unable To Help. The second field is the "CustomerPurchaseDate". The Customer in my system could possibly be, "Existing" with a purchase date of "01/01/2003". I would like the date to be removed if the "CustomerType" of Lost is selected. I understand event procedures, but I'm not for certain which event. Could you explain a little further?