Adding FileNameOpen Extended Data Type to a Form

After add EDT FileNameOpen to form using New -> stringEdit, 

add some form methods:

str fileNameLookupFilename()
{
    return '';
}

str fileNameLookupTitle()
{
    return "@SYS53008";
}

str fileNameLookupInitialPath()
{
    return '';
}

container fileNameLookupFilter()
{
    return ['All files','*.*'];
}

After get the file path, call insert method:

public void AvInsertAttachment(filename file, int i)

{    

    DocuRef docuRef;

    DocuActionArchive archive;

    ;           

    

    if(file)

    {

        ttsbegin;

        docuRef.clear();

        docuRef.RefRecId = DirPartyEntity.RecId;

        docuRef.RefTableId = tableNum(CustTable);

        docuRef.RefCompanyId = DirPartyEntity.dataAreaId;

        docuRef.Name = strFmt("Consultant Attachment %1", i);

        docuRef.TypeId = 'File';

        docuRef.insert();

        archive = new DocuActionArchive();

        archive.add(docuRef, file);

        ttsCommit;

    }

}

Result: