AnnLocked example for Delphi

var
//Global declarations
RasterAnn: LEADRasterAnnotation;
RasterAnnToolbar: LEADRasterAnnToolBar;

procedure TForm1.Button1Click(Sender: TObject);
begin
   RasterAnn:= CoLEADRasterAnnotation.Create ();
   RasterAnnToolbar:= CoLEADRasterAnnToolBar.Create ();
   RasterAnn.AnnParentRasterView := LEADRasterView1.Raster;
   LEADEventSink1.Connect (RasterAnn, _LEADRasterAnnotationEvents);
   RasterAnn.AnnUserMode:= ANN_USERMODE_DESIGN;
end;
procedure TForm1. LEADEventSink1Invoke(Sender: TObject; DispID: Integer;
  const IID: TGUID; LocaleID: Integer; Flags: Word; Params: tagDISPPARAMS;
  varResult, ExcepInfo, ArgErr: Pointer);
var
   hAnnObject:OleVariant;
begin
   case (DispID) of
      LEADRASTERANNOTATIONEVENTS_ANNLOCKED: 
      begin
         hAnnObject:= OleVariant(Params.rgvarg^[0]);
         ShowMessage ('AnnObject: ' + IntToStr(hAnnObject) + ' was locked!');
      end;
   end;
end;