If you are asking how you would code this with VBA, the answer is:
YourField <> "NONE" And Not IsNull(YourField)
"Is not null" is SQL syntax. In VBA, you use the IsNull() function.
"Like" is also SQL syntax. Logically, it is incorrect to use the Like
operator when you are not using wildcard characters and possibly
inefficient. Use "=" instead of Like whenever you always have the entire
value you are searching for. Using "Like" in a query may cause the query
engine to ignore an otherwise useful index and use a full table scan
instead. This could result in unnecessary slowness.
A final caveat, when working with text values, you may need to account for
zero-length strings in addition to nulls so I would actually code the above
statement as:
YourField <> "NONE" And YourField & "" <> "" <--- this will handle both
nulls and ZLSs in a text field. Numeric fields CANNOT contain ZLSs.
In SQL, I would use exactly the same expression:
YourField <> "NONE" And YourField & "" <> ""