Report Field updates only after Form's refresh. Why?

[digitalbalu]

Hi, In my sales entry form, I gave some discount. It is calculated & shown correctly in Form.
But in the Report It does not show the value. Later I add the coding in vba



Me.Refresh
DoCmd.OpenReport "SalesBillCustomer", acViewPreview, , tmpFilter, acDialog

First I missed Me.Refresh, It not showing discount value in Report.
But after me.refresh its working fine. Why this?
Plz clarify me.

[pbaldy]

Presuming the report is based on the underlying table(s), the values on the form were probably not saved yet.

[digitalbalu]

Thanks Pbaldy, But still confusing..
My sales table has
SaledID
SDate
CustomerID
Discount
AmountPaid

fields only. The remaining shown in the form are calculated fields. If I agree with you, When I press the Print button, It should not show the current salesID,.....etc. But shows all the current record but the discount field ONLY showing 0. Why?