In the Valid method of the txtSales:

* Your calculations here
...
ThisForm.txtGst.Value = ... && Your values here

Vlad

>I'm very new to VFP 5.0.
>Can anyone help me on this:
>
>I have 2 textbox. txtSales and txtGst
>
>1. My intention was to key in the sale figures into "txtsales". When the users press enter after keying the sales figures, I want to do some background caculation and display in "txtgst" textbox without user keying. Can anybody show me how?
>
>Many thanks.
>
>
>From Samuel Chan