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The QueryFormVisual provides the query window for a QueryFormClass object. The Init method defines and “programs” the query input dialog at runtime. The query input dialog contains a prompt, an entry field, and a query operator button for each queryable item. On each button press, the operator button cycles through the available operators: equal (, greater than or equal (>, less than or equal (<;, not equal (<;>), and no filter ( ).

The QueryFormClass recognizes these operators and uses them to create valid filter expressions.