Gewusst wie: Hinzufügen von Symbolleisten und QuickInfos zu ActiveX-Steuerelemente

      HHOOK hHook = NULL;

      // Hook procedure for WH_GETMESSAGE hook type.
      LRESULT CALLBACK GetMessageProc(int nCode, WPARAM wParam, LPARAM
         lParam)
      {
        // Switch the module state for the correct handle to be used.
        AFX_MANAGE_STATE(AfxGetStaticModuleState( ));

        // If this is a keystrokes message, translate it in controls'
        // PreTranslateMessage().
        LPMSG lpMsg = (LPMSG) lParam;

        if( (nCode >= 0) &&
          PM_REMOVE == wParam &&
          AfxGetApp()->PreTranslateMessage(lpMsg))
        {
           lpMsg->message = WM_NULL;
           lpMsg->lParam = 0L;
           lpMsg->wParam = 0;
        }


       // Passes the hook information to the next hook procedure in
       // the current hook chain.
       return ::CallNextHookEx(hHook, nCode, wParam, lParam);
      }
					

      int CCToolBarCtrl::OnCreate(LPCREATESTRUCT lpCreateStruct)
      {
         if (COleControl::OnCreate(lpCreateStruct) == -1)
            return -1;

         // Create a CToolBar window which is a child of ActiveX control.
         if (!m_ToolBar.Create(this,
               WS_CHILD | WS_VISIBLE | CBRS_TOP | CBRS_TOOLTIPS) ||
              !m_ToolBar.LoadToolBar(IDR_TOOLBAR))
            {
               TRACE0("Failed to create toolbar\n");
               return -1;      // fail to create
            }

         // Toolbar has to have TBSTYLE_TOOLTIPS style. Otherwise,
         // notification handler for TTN_NEXTTEXT won't be called.
         m_ToolBar.ModifyStyle (0, TBSTYLE_TOOLTIPS);

         // Move the toolbar so it is VISIBLE on the screen.
         CRect rc;
         GetClientRect(&rc);
         rc.bottom = rc.top + 34;
         m_ToolBar.MoveWindow(&rc);

         // Because ActiveX control is an inproc server, it does not have a
         // message pump. So, messages to child windows created by the
         // ActiveX control are not going to be received by the control.
         // Thus, we set up a message hook to call PreTranslateMessage().
         // This results in the call to FilterToolTipMessage(), which
         // activates tooltips.
         hHook = ::SetWindowsHookEx(
            WH_GETMESSAGE,
            GetMessageProc,
            AfxGetInstanceHandle(),
            GetCurrentThreadId());
         ASSERT (hHook);

         return 0;
      }
					

      void CCToolBarCtrl::OnDestroy()
      {
         // Remove the message hook function.
         VERIFY (::UnhookWindowsHookEx (hHook));

         COleControl::OnDestroy();
      }
					

      BEGIN_MESSAGE_MAP(CCToolBarCtrl, COleControl)
         //{{AFX_MSG_MAP(CCToolBarCtrl)
         ON_WM_CREATE()
         ON_COMMAND(ID_BUTTON1, OnButton1) // first button on toolbar
         ON_COMMAND(ID_BUTTON2, OnButton2) // second button on toolbar
         ON_COMMAND(ID_BUTTON3, OnButton3) // third button on toolbar
         ON_WM_DESTROY()
         //}}AFX_MSG_MAP
         ON_OLEVERB(AFX_IDS_VERB_PROPERTIES, OnProperties)

         // ANSI notification code (for Windows 95)
         ON_NOTIFY_EX_RANGE(TTN_NEEDTEXTA, 0, 0xFFFF, OnToolTipNotify)

         // Unicode notification code (for NT)
         ON_NOTIFY_EX_RANGE(TTN_NEEDTEXTW, 0, 0xFFFF, OnToolTipNotify)
      END_MESSAGE_MAP()

      // Notification handler for tooltips - determine which tooltip
      // string resource to be displayed.
      BOOL CCToolBarCtrl::OnToolTipNotify(
         UINT id, NMHDR * pNMHDR, LRESULT * pResult)
      {
         TOOLTIPTEXTA* pTTTA = (TOOLTIPTEXTA*) pNMHDR;
         TOOLTIPTEXTW* pTTTW = (TOOLTIPTEXTW*) pNMHDR;

         int strid = 0;
         switch (pNMHDR->idFrom)
         {
         case ID_BUTTON1:
            strid = IDS_BUTTON1;
            break;

         case ID_BUTTON2:
            strid = IDS_BUTTON2;
            break;

         case ID_BUTTON3:
            strid = IDS_BUTTON3;
            break;
         }

  if (strid)
       {
          *pResult = 0;
  
          CString str;
          str.LoadString(strid);
  
          #define _countof(array) (sizeof(array)/sizeof(array[0]))
  
          #ifndef _UNICODE
          if (pNMHDR->code == TTN_NEEDTEXTA)
          lstrcpyn(pTTTA->szText, str, _countof(pTTTA->szText));
          else
          _mbstowcsz(pTTTW->szText, str, _countof(pTTTW->szText));
          #else
          if (pNMHDR->code == TTN_NEEDTEXTA)
          _wcstombsz(pTTTA->szText, str, _countof(pTTTA->szText));
          else
          lstrcpyn(pTTTW->szText, str, _countof(pTTTW->szText));
          #endif
  
           return TRUE;
        }

         return FALSE;
      }