An MFC extension library to enable DLL plug-in technology for your application using MESSAGE_MAPs

// (c) R.I.Allen 2002
// You may use this code in anyway that you feel, no guarantees or waranties are implied
// please keep all headers with any source used.
//
#if !defined(AFX_PLUGINMAP_H__59D4EB00_C5CA_11D6_8DCB_9EEEC0B47742__INCLUDED_)
#define AFX_PLUGINMAP_H__59D4EB00_C5CA_11D6_8DCB_9EEEC0B47742__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// PlugInMap.h : header file
//

class CPlugInMap ;				// forward declaration

class _PLUGIN_API CPlugInObject : public CObject
{
	friend class CPlugInApp ;
public:
					CPlugInObject()
					{
					m_pClass = NULL ;
					} ;
					CPlugInObject(CPlugInObject& other)
					{
					m_pClass = other.m_pClass ;
					} ;
					CPlugInObject(CPlugInMap *pMap) : m_pClass(pMap)
					{
					} ;
	virtual			~CPlugInObject()
					{
					m_pClass = NULL ;
					} ;
	CPlugInObject&	operator=(CPlugInObject& other)
					{
					m_pClass = other.m_pClass ;
					return *this ;
					} ;
private:
	CPlugInMap*		m_pClass ;
} ;
/////////////////////////////////////////////////////////////////////////////
// CPlugInMap command target

class _PLUGIN_API CPlugInMap : public CCmdTarget
{
	friend class CPlugInApp ;
	DECLARE_DYNCREATE(CPlugInMap)

	CPlugInMap();           // protected constructor used by dynamic creation
private:
	static CList<CPlugInObject, CPlugInObject&>	m_PlugInMapList ;
protected:
	CCmdTarget*				m_pPlugInFor ;
	bool					AddObject() ;
	bool					m_bPreCall ;
	bool					m_bPostCall ;
// Attributes
public:
	virtual					~CPlugInMap() ;
	static POSITION			GetHeadPosition() ;
	static CPlugInObject&	GetAt(POSITION pos) ;
	static void				MoveNext(POSITION& pos) ;
	bool					IsPreCall() ;
	bool					IsPostCall() ;
	void					SetPreCall() ;
	void					SetPostCall() ;
// Operations
public:
	virtual LPCTSTR			GetClass() ;
	virtual CPlugInMap*		CreateMapObject() ;
	void					SetPlugInFor(CCmdTarget *pObj);
// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CPlugInMap)
	//}}AFX_VIRTUAL

// Implementation
protected:

	// Generated message map functions
	//{{AFX_MSG(CPlugInMap)
	//}}AFX_MSG

	DECLARE_MESSAGE_MAP()
};

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_PLUGINMAP_H__59D4EB00_C5CA_11D6_8DCB_9EEEC0B47742__INCLUDED_)