MS-Access Check box IF statements - ms-access

Question

How would i add a check("chk3") that will be ticked when ("Customer order Number") field has been inputted. when an order number is entered, then the check box will tick..
i also would like to know if it is possible that When the value field ("Value") is under £10,000 then the check box ("chk2") will tick. if it is over £10,000 then it will not tick

Answer 1

You may use AfterUpdate events for such validations.
Nz function checks for null value and converts them to empty string & 0 respectively
For Customer Order Number:
Private Sub txtCustomerOrderNo_AfterUpdate()
If Nz(Me.txtCustomerOrderNo, "") <> "" Then
Me.chk3 = True
Else
Me.chk3 = False
End If
End Sub
For Project value is less than 10K:
Private Sub txtProjEstimate_AfterUpdate(Cancel As Integer)
If Nz(Me.txtProjEstimate, 0) < 10000 Then
Me.chk2 = True
Else
Me.chk2 = False
End If
End Sub

Answer 2

Depends on your version of Access. In older versions, it was the AfterUpdate event. In newer ones, I think it's OnExit.
In whichever event of Customer Order Number, just set its value to True.
Private Sub CustomerOrderNumber_Exit(Cancel As Integer)
Me.chk3 = true
End Sub

Answer 3

It sort of depends what you're trying to do with the chk3 validation. If you're looking for a specific structure. For instance, a 10 digit number, then you would want a validation along those lines within the IF Statement. Something like:
(Using AfterUpdate)
If Me.[Customer order Number] LIKE "##########" Then
Me.chk3 = True
End If
Similiarly with the validation on the ck2 > £10,000 (assuming this is an appropriately designated currency field):
If Me.[Value] <= 10000 Then
Me.chk2 = True
End If