Lock A Field On Main Form If A Field On A Subform Is Complete?

Oct 24, 2005

hi, i would like to be able to prevent a user from being able to change a field (lock a field) in a main form if a field in a subform is complete. (the field in the subform is named: "new_weekly_base" if this is complete then i would like the field: "weekly base" to be locked on the main form. is this possible?, please help.

the main form is named: "SCREEN-MAIN"
the subform is named: "SCREEN-SUBFORM"
(the main form has a button on it which loads the subform.)

ive tried the below code but it doesnt work, any help would be excellent.

-------------------------------------------------------
Private Sub Form_BeforeUpdate(Cancel As Integer)
If [NEW_WEEKLY_BASE] >= 0 Then

With Me.WEEKLY_BASE
.Visible = True
.Enabled = False
End With
End If
End Sub
------------------------------------------------

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