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[france]

Кажись - это то, что вам нужно.
Полное описание в Developer Guid
Делаете поиск по слову Lookup

Creating a run-time lookup form
A standard lookup form is created through relations on the database table, and on the Extended Data Type. To learn about the standard lookup form, click .

If, however, you need to create a runtime lookup form that looks up other database fields than the ones offered by the standard lookup form, use the application class SysTableLookup and override the lookup method on the relevant form control.