Hi everyone!

I have the following code:

Filter = New Structure;
Filter .Ins ert("condition", condition);
Documents.DocName.Select(,,Filter);

The best to use a queries. For example:

Query = New Query;
   Query.Text = 
      "SELECT
      |   DocName.Ref
      |FROM
      |   Document.DocName AS DocName
      |WHERE
      |   DocName.RefKhoaLenh = &RefKhoaLenh";

   Query.SetParameter("RefKhoaLenh", RefKhoaLenh);

   QueryResult = Query.Execute();

   SelectionDetailRecords = QueryResult.Select();

   While SelectionDetailRecords.Next() Do
      // Insert selection processing SelectionDetailRecords
   EndDo;

Thanks u. I know about it but I want to use another method to process.

Ok. But it is wrong way. You can use only index attribute. See in Sintax Assintant:

<Filter> (optional)

Type: Structure.
Specifies a filter field and value of the opened selection. The structure key refers to a field name, while the structure value refers to the key filter value. As filter fields, you can only specify "Date" fields and document attributes with the indexing flag set to "Index" or "Index with additional ordering" in the Configuration Manager.
Important: A structure can contain only one element.
If the parameter is not specified filter is not used.

I solved this method.
Thanks Oleg!