Konstantin,
Our doc team responded to me. It is available here:
Agentry App Development 3.0 SP12 SDK > Agentry Language Reference > Module-Level User Interface Definitions Overview > Detail Screen Fields > Field Definitions With Edit Type-Specific Attributes > External Field - ActiveX Control
- External Field - ActiveX Control
http://help.sap.com/saphelp_smp3012sdk/helpdata/en/7c/14c5b6700610148f9985e424458fb2/content.htm
Not really easy to find I agree.
Best Regards,
Mark Pe
SAP Platinum Support Engineer