Defining A Query In A Table Adapter

Now, I don't know if what I want to do is possible, but here goes.  In the table I want to query, there is an "approval status" column, of type Int32.  There are four approval levels, 1, 2, 3 and 4.  What I want to set up is a query in the table adapter that can return all entries of one or more approval levels.  In "raw" sql, I would do something like:
 SELECT * FROM facility_table WHERE (approved IN (1,2,3));
What I want to do though, is to have the list of approval codes to be a parameter that I can pass to the table adapter query, so the where clause becomes "WHERE (approved IN (@approval))", and I pass a string with the list of approval codes.  But the query designer doesn't want to cooperate with me, as it insists that "@approval" should be an int32.
Any suggestions?