>I have established a relation between a master table and a child table in the load of the form. That I issue an OpenTables() to load my dataenvironment. I have put a grid on the form for the child table to show me that the relation is working with the master table. So far so good. It's working.
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>Now, I have a listbox on the form which has the Fields as the RowSourceType and the child.firstfield as the RowSource. In the listbox the relation does not apply because I am seeing all the child records.
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>Why? Is there something I forgot?

Try populating the listbox with the additem() property and scanning for
only the child records tied to the parents controlling field