Run time error Access 2010

When I put the below in my forms Current event

----------------
If DLookup("TickBox","table2", "ContactID = " & Me.ContactID) = True Then
    Me.lblComplete.Visible = True
    Me.Image.Visible = True
Else
    Me.lblComplete.Visible = False
    Me.Image.Visible = False
End If
--------------

I get the following error message when I try adding a new record because the 'ContactID' field is empty.  Can anyone advice?

-------------------
Run-time error '3075':
Syntax error (missing operator) in query expression 'ContactID = '.
------------------
CptPicardAsked:
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Scott McDaniel (Microsoft Access MVP - EE MVE )Infotrakker SoftwareCommented:
You can check for a New Record:

If Me.NewRecord Then
  'do something here
Else
  If DLookup("TickBox","table2", "ContactID = " & Me.ContactID) = True Then
    Me.lblComplete.Visible = True
    Me.Image.Visible = True
  Else
    Me.lblComplete.Visible = False
    Me.Image.Visible = False
  End If
End If

Or you can use the Nz function:

 If DLookup("TickBox","table2", "ContactID = " & Nz(Me.ContactID,0)) = True Then

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DatabaseMX (Joe Anderson - Microsoft Access MVP)Database Architect / Systems AnalystCommented:
or

If DLookup("TickBox","table2", "ContactID = " & Nz(Me.ContactID,0) ) = True Then
    Me.lblComplete.Visible = True
    Me.Image.Visible = True
Else
    Me.lblComplete.Visible = False
    Me.Image.Visible = False
End If
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Microsoft Access

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