I've used the following approach:

Textbox3.Refresh
This.Value=Thisform.Textbox1.Value+Thisform.Textbox2.Value

Textbox1.LostFocus and Textbox2.LostFocus
Thisform.Textbox3.Refresh

HTH

>I'm designing a form and looking for a way to display accumulative total of certain disabled textbox values on this form as each textbox loses focus. Is there a way to do this? Or is there a better way to accomplish what I'm trying to do?
>
>Thanks in advance for any help.