Shoutbox

// *********************************************************************//
// Interface: IMessenger3
// Flags:     (4416) Dual OleAutomation Dispatchable
// GUID:      {D50C3386-0F89-48F8-B204-3604629DEE10}
// *********************************************************************//
  IMessenger3 = interface(IMessenger2)
    ['{D50C3386-0F89-48F8-B204-3604629DEE10}']
    function Get_Property_(ePropType: MMESSENGERPROPERTY): OleVariant; safecall;
    procedure Set_Property_(ePropType: MMESSENGERPROPERTY; pvPropVal: OleVariant); safecall;
    property Property_[ePropType: MMESSENGERPROPERTY]: OleVariant read Get_Property_ write Set_Property_;
  end;

So I'm guessing something like;

"MessengerAPI_TLB.IMessenger3._property[2]..."

Edit: That didn't work as you might expect...hmm....