AnnLocked example for C++ Builder

//Global declarations
LEADRasterAnnotation * pRasterAnn= NULL;
LEADRasterAnnToolBar* pRasterAnnToolbar= NULL;

void __fastcall TForm1::Button1Click(TObject *Sender)
{
   CoCreateInstance(CLSID_LEADRasterAnnotation, NULL, CLSCTX_ALL, IID_ILEADRasterAnnotation, (void**)&pRasterAnn);
   CoCreateInstance(CLSID_LEADRasterAnnToolBar, NULL, CLSCTX_ALL, IID_ILEADRasterAnnToolBar, (void**)&pRasterAnnToolbar);
   pRasterAnn->AnnParentRasterView = LEADRasterView1->Raster;
   LEADEventSink1->Connect (pRasterAnn, DIID__LEADRasterAnnotationEvents);
   pRasterAnn->AnnUserMode = ANN_USERMODE_DESIGN ;
}
void __fastcall TForm1::FormClose(TObject *Sender, TCloseAction &Action)
{
   if (pRasterAnn)
      pRasterAnn->Release ();
   if (pRasterAnnToolbar)
      pRasterAnnToolbar-> Release();
}

/*The following is an example of an AnnLocked event.*/
void __fastcall TForm1:: LEADEventSink1Invoke(TObject *Sender, int DispID,
      const TGUID &IID, int LocaleID, WORD Flags, tagDISPPARAMS &Params,
      Pointer varResult, Pointer ExcepInfo, Pointer ArgErr)
{
   switch (DispID)
   {
        case LEADRASTERANNOTATIONEVENTS_ANNLOCKED:
      {
         int hAnnObject = (OleVariant)(Params.rgvarg[0]);
         ShowMessage ("AnnObject: " + IntToStr(hAnnObject) + " was locked!" );
      }
   }
}