A Beginner's Tutorial for Connection Points Using VC++ and ATL

// ConnCtl.h : Declaration of the CConnCtl

#ifndef __CONNCTL_H_
#define __CONNCTL_H_

#include "resource.h"       // main symbols
#include <atlctl.h>
#include "ConnectionCP.h"


/////////////////////////////////////////////////////////////////////////////
// CConnCtl
class ATL_NO_VTABLE CConnCtl : 
	public CComObjectRootEx<CComSingleThreadModel>,
	public IDispatchImpl<IConnCtl, &IID_IConnCtl, &LIBID_CONNECTIONLib>,
	public CComCompositeControl<CConnCtl>,
	public IPersistStreamInitImpl<CConnCtl>,
	public IOleControlImpl<CConnCtl>,
	public IOleObjectImpl<CConnCtl>,
	public IOleInPlaceActiveObjectImpl<CConnCtl>,
	public IViewObjectExImpl<CConnCtl>,
	public IOleInPlaceObjectWindowlessImpl<CConnCtl>,
	public IConnectionPointContainerImpl<CConnCtl>,
	public IPersistStorageImpl<CConnCtl>,
	public ISpecifyPropertyPagesImpl<CConnCtl>,
	public IQuickActivateImpl<CConnCtl>,
	public IDataObjectImpl<CConnCtl>,
	public IProvideClassInfo2Impl<&CLSID_ConnCtl, &DIID__IConnCtlEvents, &LIBID_CONNECTIONLib>,
	public IPropertyNotifySinkCP<CConnCtl>,
	public CComCoClass<CConnCtl, &CLSID_ConnCtl>,
	public CProxy_IConnCtlEvents< CConnCtl >
{
	public:
		CConnCtl();

DECLARE_REGISTRY_RESOURCEID(IDR_CONNCTL)

DECLARE_PROTECT_FINAL_CONSTRUCT()

BEGIN_COM_MAP(CConnCtl)
	COM_INTERFACE_ENTRY(IConnCtl)
	COM_INTERFACE_ENTRY(IDispatch)
	COM_INTERFACE_ENTRY(IViewObjectEx)
	COM_INTERFACE_ENTRY(IViewObject2)
	COM_INTERFACE_ENTRY(IViewObject)
	COM_INTERFACE_ENTRY(IOleInPlaceObjectWindowless)
	COM_INTERFACE_ENTRY(IOleInPlaceObject)
	COM_INTERFACE_ENTRY2(IOleWindow, IOleInPlaceObjectWindowless)
	COM_INTERFACE_ENTRY(IOleInPlaceActiveObject)
	COM_INTERFACE_ENTRY(IOleControl)
	COM_INTERFACE_ENTRY(IOleObject)
	COM_INTERFACE_ENTRY(IPersistStreamInit)
	COM_INTERFACE_ENTRY2(IPersist, IPersistStreamInit)
	COM_INTERFACE_ENTRY(IConnectionPointContainer)
	COM_INTERFACE_ENTRY(ISpecifyPropertyPages)
	COM_INTERFACE_ENTRY(IQuickActivate)
	COM_INTERFACE_ENTRY(IPersistStorage)
	COM_INTERFACE_ENTRY(IDataObject)
	COM_INTERFACE_ENTRY(IProvideClassInfo)
	COM_INTERFACE_ENTRY(IProvideClassInfo2)
	COM_INTERFACE_ENTRY_IMPL(IConnectionPointContainer)
END_COM_MAP()

BEGIN_PROP_MAP(CConnCtl)
	PROP_DATA_ENTRY("_cx", m_sizeExtent.cx, VT_UI4)
	PROP_DATA_ENTRY("_cy", m_sizeExtent.cy, VT_UI4)
	// Example entries
	// PROP_ENTRY("Property Description", dispid, clsid)
	// PROP_PAGE(CLSID_StockColorPage)
END_PROP_MAP()

BEGIN_CONNECTION_POINT_MAP(CConnCtl)
	CONNECTION_POINT_ENTRY(IID_IPropertyNotifySink)
	CONNECTION_POINT_ENTRY(DIID__IConnCtlEvents)
END_CONNECTION_POINT_MAP()

BEGIN_MSG_MAP(CConnCtl)
	CHAIN_MSG_MAP(CComCompositeControl<CConnCtl>)
	COMMAND_HANDLER(IDC_BUTTON1, BN_CLICKED, OnClickedButton)
END_MSG_MAP()
// Handler prototypes:
//  LRESULT MessageHandler(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
//  LRESULT CommandHandler(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled);
//  LRESULT NotifyHandler(int idCtrl, LPNMHDR pnmh, BOOL& bHandled);

BEGIN_SINK_MAP(CConnCtl)
	//Make sure the Event Handlers have __stdcall calling convention
END_SINK_MAP()

	STDMETHOD(OnAmbientPropertyChange)(DISPID dispid)
	{
		if (dispid == DISPID_AMBIENT_BACKCOLOR)
		{
			SetBackgroundColorFromAmbient();
			FireViewChange();
		}
		return IOleControlImpl<CConnCtl>::OnAmbientPropertyChange(dispid);
	}

// IViewObjectEx
	DECLARE_VIEW_STATUS(0)

// IConnCtl
	public:
		enum { IDD = IDD_CONNCTL };
		LRESULT OnClickedButton(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled);
	private:
		int		_clickCount;

		void ClickCounter();
};

#endif //__CONNCTL_H_