How to get a code for the selected item group after opening the form?

Question

1C

ОткрытьФорму("Справочник.Номенклатура.ФормаВыбораГруппы");

The selection form opens. I press the "Select" button - how to get the group code? Or a link. That is, return the value of the selection.

Answer 1

The form must be in selection mode (this is either set in its properties, or passed to the Form Parameters parameter in the opening function) (you can, of course, send the selection event by code, but why?), then you need to pass the control to the "owner" parameter, in which the selected value should be placed, or specify the parameter DescriptionNotificationOnClosing, to the handler of which the selected value will be returned.
If you need a multiple choice (aka "selection"), then you need to catch the NotificationOfChoice in the "parent" form.
In principle, in the syntax assistant, all parameters are described

Answer 2

See
https://its.1c.ru/db/metod8dev/content/2222/hdoc