>Thank you Cathi
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>I read the Table of Content of the book and I did not find any references to de RDC. What I want Cathi, is information on how can I add to the viewer toolbox the "Select expert", or to find a way to give the users of my applications help on constructing a selection of records for the report.
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>thanks for your help

The book does not focus on the developer side but more on the user side. There aren't any books for version 8.5 that focus on the types of information you are looking for.