Null value for variables

Hey I'm trying to check if a variable has a value assigned or not.

Dim var as Integer

If var=Null then
...
else
...
end if

But it seems that Null doesn't exist, and 'Nothing' isn't quite the same as for an integer Nothing=0.

Any ideas? thanks.

I believe an integer is automatically 0 when not initiated, but wouldn't null just be an empty set ("")?

Nothing is when the object hasn't been initialised i.e.

Code:

---

Dim NewClass as Class1

If NewClass Is Nothing Then
    'NewClass is Nothing because it hasn't been initialized yet.
End If

'Whereas
Dim NewClass as New Class1

If NewClass Is Nothing Then

Else
    'NewClass is not Nothing because it has been initialized.
End If

---

A string is always an empty string, which is not nothing. An Integer or any variation of it will always be 0 is it hasn't been set.