Me.Recalc in After Update event forces tab key to be pressed twice. Why?

[Celal]

Hello, this may seem a simple question but it does get annoying after some time.

I have a continuous subform with a hidden calculated control named 'txt_purchSubSum' in the footer with control source as =Sum([purchUnitQty]*[purchUnitPrice]). Both purchUnitQty and purchUnitPrice are on the same subform.

On the main form, I have a textbox named 'txt_purchMainSum' with control source =[Purchase Details].Form!txt_purchSubSum where [Purchase Details] is the subform. This textbox shows the running some of the items in the subform.

I have AfterUpdate events for both purchUnitQty and purchUnitPrice on subform as me.recalc (I use recalc instead of requery because recalc refreshes in run time while you need to leave the current record in requery).

All works fine but when I change the values in purchUnitQty or purchUnitPrice, it recalculates the control on main form but I need to press enter or tab twice to leave the control.

Anybody know why and how I can get around this??

[Celal]

I used me.refresh instead of recalc and it worked though I still have not figured out the difference