Null Keyword
Group Constant
Description A variant expression that is null. A null value propagates through an expression causing the entire expression to be Null. Attempting to use a Null value as a string or numeric argument causes a run-time error. A Null value prints as "#NULL#".
See Also IsNull.
Example            
'#Language 
"WWB-COM"
Sub Main
    X = 
Null
    Debug.Print X = Null  
'#NULL#
    Debug.Print IsNull(X) 
'True
End Sub