Vlad, The code u sent to me work. The part that I mentioned it didn't work was before I asked u. From Samuel :) > >>>Does it work now? If not, post your code here and me (or somebody else) >will tell you it doesn't work. >>> >>>Vlad >>> >>>>A thousand thanks Vlad. I have tried to figure out the whole morning and >could >>>>not get it work. >>>> >>>>Samuel >>>> >>>> >>>>> >>>>>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 >> >>Vald >> >>If he post the code he already knows it does not work. >> >>Jeff > >:) I meant: "why it doesn't work". :) Thanks! > >Vlad