How do I test if an object has been instantiated?

Dim F as Form
.
.
.
Set F = frmSomeForm

If I do a quick watch on F prior to the set statement being executed, vb tells me the value of F is Nothing. However if I attempt to code:

If F = Nothing then
.
.
.
End If

I get an "Invalid use of object error message". How would I test if the set statement has been executed (i.e. F has been instantiated)?

That is almost right, we use Is with objects though

Code:

---

If Not myObject Is Nothing Then
  'then the object exists
Else
  'It is not initiated
End If

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Thanks a bunch!
(I should have known/thought of that!)