This is a feature of JBuilder Professional and Enterprise.
The Specify Parameter Values dialog box is displayed when you click the Execute Query button on the Test page of the Data Modeler and you have a parameterized query.
The Specify Parameter Values dialog box lets you enter values for the parameters in a parameterized query. The grid that appears within the dialog box has a column for each parameter in your query. Enter a value for each parameter, choose OK, and the query executes.
The values you entered are not saved in the IDL file or data module you are creating with the Data Modeler. The values simply allow you to test your parameterized query.