mfc第三天

消息映射机制

1)必须继承自CCmdTarget
    2)类中药添加声明宏 DECLARE_MESSAGE_MAP()
    3)类外添加实现宏
        BEGIN_MESSAGE_MAP(theClass,baseClass)////本类，基类
            ON_MESSAGE(msg,functionname)
        END_MESSAGE_MAP()
        
3宏展开各部分的作用
    _messageEntries[]--静态数组
    保存了消息ID和处理这个消息的函数的对应关系
    messageMap-静态变量
        1- 保存父类的静态变量地址
        2- 保存本类的静态数组首地址
    
    GetMessageMap---虚函数
        获取本类静态变量地址(链表的头结点)
    
4关系
    GetMessageMap()
        |->CMyFrameWnd::_messageEntries[]
            |->消息ID.....处理函数地址
        ......................................    //不论写不写消息宏,父类..的消息链表都存在
        |->CFrameWnd::messageMap        //加宏实为加节点
            |->CFrameWnd::_messageEntries[]
                |->消息ID...处理函数地址
                ....................................
                |->CWnd::messageMap
                    |->CWnd::_messageEntries[]
                        |->消息ID....处理函数地址
                    |->CCmdTarget::messageMap
                        |->CCmdTarget::_messageEntries[]
                            |->消息ID...处理函数地址
                        |->NULL
5消息处理过程
    1)利用GetMessageMap函数获取本类静态变量地址(链表头结点)pMessageMap
    2)利用pMessageMap头结点的第二个语速获取对应静态数组，然后在数组中
      查找对应消息函数地址的地址,如果找到执行3,未找到则执行4
    3)使用找到的数组元素的最后一个成员(成员函数的地址),并调用这个函数完成消息处理
    4)利用pMessageMap的第一个元素获取父类的静态变量地址，并重新给pMessageMap赋值为
    父类的静态变量地址执行2
    5)遍历整个链表都未找到则调用DefWindowProc给消息做默认处理.

二MFC消息分类
    1)标准消息
        ON_WM_XXX
    2)命令消息(WM_COMMAND)    //菜单  加速键  通知消息
        ON_COMMAND(命令ID,处理函数)
        ON_COMMAND_RANGE(起始ID,终止ID,处理函数)    //往数组中扔通知消息
        //从起始ID到终止ID都由这个函数处理    
    3)自定义消息
        #define WM_MYMESSAGE WM_USER+n  WM_USER==0x400 n<=      
        没有专门处理自定义消息的宏    由通用消息宏处理
        ON_MESSAGE(消息ID,处理函数)
    4)通知消息
        ON_EN_CHANGE        //EN---EDIT_NOTIFY

WM_COMMAND WM_NOTIFY 消息另行处理
**********************************************************************
封装好的消息映射宏    标准消息

ON_WM_CREATE()
#define ON_WM_CREATE() \
    { WM_CREATE, 0, 0, 0, AfxSig_is, \        //AfxSig_is--->int
        (AFX_PMSG)(AFX_PMSGW)(int (AFX_MSG_CALL CWnd::*)(LPCREATESTRUCT))&OnCreate },
ON_WM_CREATE( ) afx_msg int OnCreate( LPCREATESTRUCT );     //afx_msg 占位符 提高可读性

控件通知消息

#define ON_COMMAND(id, memberFxn) \
    { WM_COMMAND, CN_COMMAND, (WORD)id, (WORD)id, AfxSig_vv, (AFX_PMSG)&memberFxn },
CN_COMMAND通知码  都是0

afx_msg void memberFxn( );    //MSDN声明

#define CN_COMMAND              0               // void ()
#define CN_UPDATE_COMMAND_UI    ((UINT)(-1))    // void (CCmdUI*)
#define CN_EVENT                ((UINT)(-2))    // OLE event
#define CN_OLECOMMAND           ((UINT)(-3))    // OLE document command
#define CN_OLE_UNREGISTER       ((UINT)(-4))    // OLE unregister


#define ON_COMMAND_RANGE(id, idLast, memberFxn) \            //不建议使用,if else switch case
    { WM_COMMAND, CN_COMMAND, (WORD)id, (WORD)idLast, AfxSig_vw, \    //容易扰乱程序结构,降低可读性
        (AFX_PMSG)(void (AFX_MSG_CALL CCmdTarget::*)(UINT))&memberFxn },

MSDN中的例子
// The code fragment below shows how to use ON_COMMAND_RANGE macro
// to map a contiguous range of command IDs to a single message
// handler function (i.e. OnFileMenuItems() is the sample below). In
// addition, it also shows how to use CheckMenuRadioItem() to check a
// selected menu item and makes it a radio item.
BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
   //{{AFX_MSG_MAP(CMainFrame)
   // ...
   //}}AFX_MSG_MAP
   ON_COMMAND_RANGE(ID_FILE_MENUITEM1, ID_FILE_MENUITEM3, OnFileMenuItems)
END_MESSAGE_MAP()

void CMainFrame::OnFileMenuItems(UINT nID)
{
   CMenu* mmenu = GetMenu();
   CMenu* submenu = mmenu->GetSubMenu(0);
   submenu->CheckMenuRadioItem(ID_FILE_MENUITEM1, ID_FILE_MENUITEM3,
      nID, MF_BYCOMMAND);
}



#define ON_MESSAGE(message, memberFxn) \
    { message, 0, 0, 0, AfxSig_lwl, \
        (AFX_PMSG)(AFX_PMSGW)(LRESULT (AFX_MSG_CALL CWnd::*)(WPARAM, LPARAM))&memberFxn },

// Edit Control Notification Codes
#define ON_EN_SETFOCUS(id, memberFxn) \
    ON_CONTROL(EN_SETFOCUS, id, memberFxn)
#define O

**********************************************************************伪代码以WM_CREATE消息为例AfxWndProc(....){CWnd* pWnd = CWnd::FromHandlePermanent(hWnd);//获取和窗口句柄绑定在一起的框架类对象地址(pFrame)ASSERT(pWnd != NULL);ASSERT(pWnd->m_hWnd == hWnd);if (pWnd == NULL || pWnd->m_hWnd != hWnd)return ::DefWindowProc(hWnd, nMsg, wParam, lParam);&&&return AfxCallWndProc(pWnd, hWnd, nMsg, wParam, lParam);}return AfxCallWndProc(pWnd, hWnd, nMsg, wParam, lParam);//pWnd==pFramelResult = pWnd->WindowProc(nMsg, wParam, lParam);//pWnd==pFrameLRESULT CWnd::WindowProc(UINT message, WPARAM wParam, LPARAM lParam){OnWndMsg(message, wParam, lParam, &lResult){const AFX_MSGMAP* pMessageMap; pMessageMap = GetMessageMap();{//进入宏展开  返回链表头结点地址(本类静态变量)return &CMyFrameWnd::messageMap;}const AFX_MSGMAP_ENTRY* lpEntry;for (; pMessageMap != NULL;pMessageMap = pMessageMap->pBaseMap)//遍历链表(lpEntry = AfxFindMessageEntry(pMessageMap->lpEntries,message, 0, 0)) != NULL)///用WM_CREATE匹配消息链表,找到处理函数(查找本类静态数组)///如果没找到则去父类找，找到返回匹配到的数组元素的地址///没找到则默认处理if(lpEntry!=NULL){goto LDispatch;//跳出for循环一旦找到跳出for循环,不在变量链表}LDispatch:union MessageMapFunctions mmf;//lpEntry为消息数组中WM_CREATE的地址mmf.pfn = lpEntry->pfn;//pfn=CMyFrameWnd::OnCreate//pfn结构体最后一个成员int nSig;//nSig = lpEntry->nSig;//switch(nSig){//联合体有多少成员就有多少种情况......case AfxSig_lwl:lResult = (this->*mmf.pfn_lwl)(wParam, lParam);break;......此时mmf.pfn_lwl=&OnCreate 因为其类型为联合体,先前赋值为&OnCreate而后未覆盖.所有成员公用此值}}}**********************************************************************LRESULT CWnd::WindowProc(UINT message, WPARAM wParam, LPARAM lParam){// OnWndMsg does most of the work, except for DefWindowProc callLRESULT lResult = 0;//this=pFrameif (!OnWndMsg(message, wParam, lParam, &lResult))----------->lResult = DefWindowProc(message, wParam, lParam);return lResult;}**********************************************************************CWnd* PASCAL CWnd::FromHandlePermanent(HWND hWnd){CHandleMap* pMap = afxMapHWND();CWnd* pWnd = NULL;if (pMap != NULL){// only look in the permanent map - does no allocationspWnd = (CWnd*)pMap->LookupPermanent(hWnd);ASSERT(pWnd == NULL || pWnd->m_hWnd == hWnd);}return pWnd;}**********************************************************************CHandleMap* PASCAL afxMapHWND(BOOL bCreate){AFX_MODULE_THREAD_STATE* pState = AfxGetModuleThreadState();if (pState->m_pmapHWND == NULL && bCreate){BOOL bEnable = AfxEnableMemoryTracking(FALSE);#ifndef _AFX_PORTABLE_PNH pnhOldHandler = AfxSetNewHandler(&AfxCriticalNewHandler);#endifpState->m_pmapHWND = new CHandleMap(RUNTIME_CLASS(CTempWnd),offsetof(CWnd, m_hWnd));#ifndef _AFX_PORTABLEAfxSetNewHandler(pnhOldHandler);#endifAfxEnableMemoryTracking(bEnable);}return pState->m_pmapHWND;}**********************************************************************inline CObject* CHandleMap::LookupPermanent(HANDLE h){ return (CObject*)m_permanentMap.GetValueAt((LPVOID)h); }********************************************************************************************************************************************union MessageMapFunctions{AFX_PMSG pfn;   // generic member function pointer// specific type safe variants for WM_COMMAND and WM_NOTIFY messagesvoid (AFX_MSG_CALL CCmdTarget::*pfn_COMMAND)();BOOL (AFX_MSG_CALL CCmdTarget::*pfn_bCOMMAND)();void (AFX_MSG_CALL CCmdTarget::*pfn_COMMAND_RANGE)(UINT);BOOL (AFX_MSG_CALL CCmdTarget::*pfn_COMMAND_EX)(UINT);void (AFX_MSG_CALL CCmdTarget::*pfn_UPDATE_COMMAND_UI)(CCmdUI*);void (AFX_MSG_CALL CCmdTarget::*pfn_UPDATE_COMMAND_UI_RANGE)(CCmdUI*, UINT);void (AFX_MSG_CALL CCmdTarget::*pfn_OTHER)(void*);BOOL (AFX_MSG_CALL CCmdTarget::*pfn_OTHER_EX)(void*);void (AFX_MSG_CALL CCmdTarget::*pfn_NOTIFY)(NMHDR*, LRESULT*);BOOL (AFX_MSG_CALL CCmdTarget::*pfn_bNOTIFY)(NMHDR*, LRESULT*);void (AFX_MSG_CALL CCmdTarget::*pfn_NOTIFY_RANGE)(UINT, NMHDR*, LRESULT*);BOOL (AFX_MSG_CALL CCmdTarget::*pfn_NOTIFY_EX)(UINT, NMHDR*, LRESULT*);// type safe variant for thread messagesvoid (AFX_MSG_CALL CWinThread::*pfn_THREAD)(WPARAM, LPARAM);// specific type safe variants for WM-style messagesBOOL    (AFX_MSG_CALL CWnd::*pfn_bD)(CDC*);BOOL    (AFX_MSG_CALL CWnd::*pfn_bb)(BOOL);BOOL    (AFX_MSG_CALL CWnd::*pfn_bWww)(CWnd*, UINT, UINT);BOOL    (AFX_MSG_CALL CWnd::*pfn_bHELPINFO)(HELPINFO*);BOOL    (AFX_MSG_CALL CWnd::*pfn_bWCDS)(CWnd*, COPYDATASTRUCT*);HBRUSH  (AFX_MSG_CALL CWnd::*pfn_hDWw)(CDC*, CWnd*, UINT);HBRUSH  (AFX_MSG_CALL CWnd::*pfn_hDw)(CDC*, UINT);int     (AFX_MSG_CALL CWnd::*pfn_iwWw)(UINT, CWnd*, UINT);int     (AFX_MSG_CALL CWnd::*pfn_iww)(UINT, UINT);int     (AFX_MSG_CALL CWnd::*pfn_iWww)(CWnd*, UINT, UINT);int     (AFX_MSG_CALL CWnd::*pfn_is)(LPTSTR);LRESULT (AFX_MSG_CALL CWnd::*pfn_lwl)(WPARAM, LPARAM);LRESULT (AFX_MSG_CALL CWnd::*pfn_lwwM)(UINT, UINT, CMenu*);void    (AFX_MSG_CALL CWnd::*pfn_vv)(void);void    (AFX_MSG_CALL CWnd::*pfn_vw)(UINT);void    (AFX_MSG_CALL CWnd::*pfn_vww)(UINT, UINT);void    (AFX_MSG_CALL CWnd::*pfn_vvii)(int, int);void    (AFX_MSG_CALL CWnd::*pfn_vwww)(UINT, UINT, UINT);void    (AFX_MSG_CALL CWnd::*pfn_vwii)(UINT, int, int);void    (AFX_MSG_CALL CWnd::*pfn_vwl)(WPARAM, LPARAM);void    (AFX_MSG_CALL CWnd::*pfn_vbWW)(BOOL, CWnd*, CWnd*);void    (AFX_MSG_CALL CWnd::*pfn_vD)(CDC*);void    (AFX_MSG_CALL CWnd::*pfn_vM)(CMenu*);void    (AFX_MSG_CALL CWnd::*pfn_vMwb)(CMenu*, UINT, BOOL);void    (AFX_MSG_CALL CWnd::*pfn_vW)(CWnd*);void    (AFX_MSG_CALL CWnd::*pfn_vWww)(CWnd*, UINT, UINT);void    (AFX_MSG_CALL CWnd::*pfn_vWp)(CWnd*, CPoint);void    (AFX_MSG_CALL CWnd::*pfn_vWh)(CWnd*, HANDLE);void    (AFX_MSG_CALL CWnd::*pfn_vwW)(UINT, CWnd*);void    (AFX_MSG_CALL CWnd::*pfn_vwWb)(UINT, CWnd*, BOOL);void    (AFX_MSG_CALL CWnd::*pfn_vwwW)(UINT, UINT, CWnd*);void    (AFX_MSG_CALL CWnd::*pfn_vwwx)(UINT, UINT);void    (AFX_MSG_CALL CWnd::*pfn_vs)(LPTSTR);void    (AFX_MSG_CALL CWnd::*pfn_vOWNER)(int, LPTSTR);   // force return TRUEint     (AFX_MSG_CALL CWnd::*pfn_iis)(int, LPTSTR);UINT    (AFX_MSG_CALL CWnd::*pfn_wp)(CPoint);UINT    (AFX_MSG_CALL CWnd::*pfn_wv)(void);void    (AFX_MSG_CALL CWnd::*pfn_vPOS)(WINDOWPOS*);void    (AFX_MSG_CALL CWnd::*pfn_vCALC)(BOOL, NCCALCSIZE_PARAMS*);void    (AFX_MSG_CALL CWnd::*pfn_vwp)(UINT, CPoint);void    (AFX_MSG_CALL CWnd::*pfn_vwwh)(UINT, UINT, HANDLE);BOOL    (AFX_MSG_CALL CWnd::*pfn_bwsp)(UINT, short, CPoint);void    (AFX_MSG_CALL CWnd::*pfn_vws)(UINT, LPCTSTR);};**********************************************************************BOOL CWnd::OnWndMsg(UINT message, WPARAM wParam, LPARAM lParam, LRESULT* pResult){LRESULT lResult = 0;// special case for commandsif (message == WM_COMMAND){if (OnCommand(wParam, lParam)){lResult = 1;goto LReturnTrue;}return FALSE;}// special case for notifiesif (message == WM_NOTIFY){NMHDR* pNMHDR = (NMHDR*)lParam;if (pNMHDR->hwndFrom != NULL && OnNotify(wParam, lParam, &lResult))goto LReturnTrue;return FALSE;}// special case for activationif (message == WM_ACTIVATE)_AfxHandleActivate(this, wParam, CWnd::FromHandle((HWND)lParam));// special case for set cursor HTERRORif (message == WM_SETCURSOR &&_AfxHandleSetCursor(this, (short)LOWORD(lParam), HIWORD(lParam))){lResult = 1;goto LReturnTrue;}const AFX_MSGMAP* pMessageMap; pMessageMap = GetMessageMap();this->GetMessageMap===pFrame->GetMessageMap回到宏展开取链表的头结点UINT iHash; iHash = (LOWORD((DWORD)pMessageMap) ^ message) & (iHashMax-1);AfxLockGlobals(CRIT_WINMSGCACHE);AFX_MSG_CACHE* pMsgCache; pMsgCache = &_afxMsgCache[iHash];const AFX_MSGMAP_ENTRY* lpEntry;if (message == pMsgCache->nMsg && pMessageMap == pMsgCache->pMessageMap){// cache hitlpEntry = pMsgCache->lpEntry;AfxUnlockGlobals(CRIT_WINMSGCACHE);if (lpEntry == NULL)return FALSE;// cache hit, and it needs to be handledif (message < 0xC000)goto LDispatch;elsegoto LDispatchRegistered;}else{// not in cache, look for itpMsgCache->nMsg = message;pMsgCache->pMessageMap = pMessageMap;#ifdef _AFXDLLfor (/* pMessageMap already init'ed */; pMessageMap != NULL;pMessageMap = (*pMessageMap->pfnGetBaseMap)())#elsefor (/* pMessageMap already init'ed */; pMessageMap != NULL;pMessageMap = pMessageMap->pBaseMap)#endif{// Note: catch not so common but fatal mistake!!//      BEGIN_MESSAGE_MAP(CMyWnd, CMyWnd)#ifdef _AFXDLLASSERT(pMessageMap != (*pMessageMap->pfnGetBaseMap)());#elseASSERT(pMessageMap != pMessageMap->pBaseMap);#endifif (message < 0xC000){// constant window messageif ((lpEntry = AfxFindMessageEntry(pMessageMap->lpEntries,message, 0, 0)) != NULL){pMsgCache->lpEntry = lpEntry;AfxUnlockGlobals(CRIT_WINMSGCACHE);goto LDispatch;//跳出for循环}}else{// registered windows messagelpEntry = pMessageMap->lpEntries;while ((lpEntry = AfxFindMessageEntry(lpEntry, 0xC000, 0, 0)) != NULL){UINT* pnID = (UINT*)(lpEntry->nSig);ASSERT(*pnID >= 0xC000 || *pnID == 0);// must be successfully registeredif (*pnID == message){pMsgCache->lpEntry = lpEntry;AfxUnlockGlobals(CRIT_WINMSGCACHE);goto LDispatchRegistered;}lpEntry++;      // keep looking past this one}}}pMsgCache->lpEntry = NULL;AfxUnlockGlobals(CRIT_WINMSGCACHE);return FALSE;}ASSERT(FALSE);      // not reachedLDispatch:ASSERT(message < 0xC000);union MessageMapFunctions mmf;mmf.pfn = lpEntry->pfn;// if we've got WM_SETTINGCHANGE / WM_WININICHANGE, we need to// decide if we're going to call OnWinIniChange() or OnSettingChange()int nSig;nSig = lpEntry->nSig;if (lpEntry->nID == WM_SETTINGCHANGE){DWORD dwVersion = GetVersion();if (LOBYTE(LOWORD(dwVersion)) >= 4)nSig = AfxSig_vws;elsenSig = AfxSig_vs;}switch (nSig){default:ASSERT(FALSE);break;case AfxSig_bD:lResult = (this->*mmf.pfn_bD)(CDC::FromHandle((HDC)wParam));break;case AfxSig_bb:     // AfxSig_bb, AfxSig_bw, AfxSig_bhlResult = (this->*mmf.pfn_bb)((BOOL)wParam);break;case AfxSig_bWww:   // really AfxSig_bWiwlResult = (this->*mmf.pfn_bWww)(CWnd::FromHandle((HWND)wParam),(short)LOWORD(lParam), HIWORD(lParam));break;case AfxSig_bWCDS:lResult = (this->*mmf.pfn_bWCDS)(CWnd::FromHandle((HWND)wParam),(COPYDATASTRUCT*)lParam);break;case AfxSig_bHELPINFO:lResult = (this->*mmf.pfn_bHELPINFO)((HELPINFO*)lParam);break;case AfxSig_hDWw:{// special case for OnCtlColor to avoid too many temporary objectsASSERT(message == WM_CTLCOLOR);AFX_CTLCOLOR* pCtl = (AFX_CTLCOLOR*)lParam;CDC dcTemp; dcTemp.m_hDC = pCtl->hDC;CWnd wndTemp; wndTemp.m_hWnd = pCtl->hWnd;UINT nCtlType = pCtl->nCtlType;// if not coming from a permanent window, use stack temporaryCWnd* pWnd = CWnd::FromHandlePermanent(wndTemp.m_hWnd);if (pWnd == NULL){#ifndef _AFX_NO_OCC_SUPPORT// determine the site of the OLE control if it is oneCOleControlSite* pSite;if (m_pCtrlCont != NULL && (pSite = (COleControlSite*)m_pCtrlCont->m_siteMap.GetValueAt(wndTemp.m_hWnd)) != NULL){wndTemp.m_pCtrlSite = pSite;}#endifpWnd = &wndTemp;}HBRUSH hbr = (this->*mmf.pfn_hDWw)(&dcTemp, pWnd, nCtlType);// fast detach of temporary objectsdcTemp.m_hDC = NULL;wndTemp.m_hWnd = NULL;lResult = (LRESULT)hbr;}break;case AfxSig_hDw:{// special case for CtlColor to avoid too many temporary objectsASSERT(message == WM_REFLECT_BASE+WM_CTLCOLOR);AFX_CTLCOLOR* pCtl = (AFX_CTLCOLOR*)lParam;CDC dcTemp; dcTemp.m_hDC = pCtl->hDC;UINT nCtlType = pCtl->nCtlType;HBRUSH hbr = (this->*mmf.pfn_hDw)(&dcTemp, nCtlType);// fast detach of temporary objectsdcTemp.m_hDC = NULL;lResult = (LRESULT)hbr;}break;case AfxSig_iwWw:lResult = (this->*mmf.pfn_iwWw)(LOWORD(wParam),CWnd::FromHandle((HWND)lParam), HIWORD(wParam));break;case AfxSig_iww:lResult = (this->*mmf.pfn_iww)(LOWORD(wParam), HIWORD(wParam));break;case AfxSig_iWww:   // really AfxSig_iWiwlResult = (this->*mmf.pfn_iWww)(CWnd::FromHandle((HWND)wParam),(short)LOWORD(lParam), HIWORD(lParam));break;case AfxSig_is:lResult = (this->*mmf.pfn_is)((LPTSTR)lParam);break;case AfxSig_lwl:lResult = (this->*mmf.pfn_lwl)(wParam, lParam);break;case AfxSig_lwwM:lResult = (this->*mmf.pfn_lwwM)((UINT)LOWORD(wParam),(UINT)HIWORD(wParam), (CMenu*)CMenu::FromHandle((HMENU)lParam));break;case AfxSig_vv:(this->*mmf.pfn_vv)();break;case AfxSig_vw: // AfxSig_vb, AfxSig_vh(this->*mmf.pfn_vw)(wParam);break;case AfxSig_vww:(this->*mmf.pfn_vww)((UINT)wParam, (UINT)lParam);break;case AfxSig_vvii:(this->*mmf.pfn_vvii)((short)LOWORD(lParam), (short)HIWORD(lParam));break;case AfxSig_vwww:(this->*mmf.pfn_vwww)(wParam, LOWORD(lParam), HIWORD(lParam));break;case AfxSig_vwii:(this->*mmf.pfn_vwii)(wParam, LOWORD(lParam), HIWORD(lParam));break;case AfxSig_vwl:(this->*mmf.pfn_vwl)(wParam, lParam);break;case AfxSig_vbWW:(this->*mmf.pfn_vbWW)(m_hWnd == (HWND)lParam,CWnd::FromHandle((HWND)lParam),CWnd::FromHandle((HWND)wParam));break;case AfxSig_vD:(this->*mmf.pfn_vD)(CDC::FromHandle((HDC)wParam));break;case AfxSig_vM:(this->*mmf.pfn_vM)(CMenu::FromHandle((HMENU)wParam));break;case AfxSig_vMwb:(this->*mmf.pfn_vMwb)(CMenu::FromHandle((HMENU)wParam),LOWORD(lParam), (BOOL)HIWORD(lParam));break;case AfxSig_vW:(this->*mmf.pfn_vW)(CWnd::FromHandle((HWND)wParam));break;case AfxSig_vW2:(this->*mmf.pfn_vW)(CWnd::FromHandle((HWND)lParam));break;case AfxSig_vWww:(this->*mmf.pfn_vWww)(CWnd::FromHandle((HWND)wParam), LOWORD(lParam),HIWORD(lParam));break;case AfxSig_vWp:{CPoint point((DWORD)lParam);(this->*mmf.pfn_vWp)(CWnd::FromHandle((HWND)wParam), point);}break;case AfxSig_vWh:(this->*mmf.pfn_vWh)(CWnd::FromHandle((HWND)wParam),(HANDLE)lParam);break;case AfxSig_vwW:(this->*mmf.pfn_vwW)(wParam, CWnd::FromHandle((HWND)lParam));break;case AfxSig_vwWb:(this->*mmf.pfn_vwWb)((UINT)(LOWORD(wParam)),CWnd::FromHandle((HWND)lParam), (BOOL)HIWORD(wParam));break;case AfxSig_vwwW:case AfxSig_vwwx:{// special case for WM_VSCROLL and WM_HSCROLLASSERT(message == WM_VSCROLL || message == WM_HSCROLL ||message == WM_VSCROLL+WM_REFLECT_BASE || message == WM_HSCROLL+WM_REFLECT_BASE);int nScrollCode = (short)LOWORD(wParam);int nPos = (short)HIWORD(wParam);if (lpEntry->nSig == AfxSig_vwwW)(this->*mmf.pfn_vwwW)(nScrollCode, nPos,CWnd::FromHandle((HWND)lParam));else(this->*mmf.pfn_vwwx)(nScrollCode, nPos);}break;case AfxSig_vs:(this->*mmf.pfn_vs)((LPTSTR)lParam);break;case AfxSig_vws:(this->*mmf.pfn_vws)((UINT) wParam, (LPCTSTR)lParam);break;case AfxSig_vOWNER:(this->*mmf.pfn_vOWNER)((int)wParam, (LPTSTR)lParam);lResult = TRUE;break;case AfxSig_iis:lResult = (this->*mmf.pfn_iis)((int)wParam, (LPTSTR)lParam);break;case AfxSig_wp:{CPoint point((DWORD)lParam);lResult = (this->*mmf.pfn_wp)(point);}break;case AfxSig_wv: // AfxSig_bv, AfxSig_wvlResult = (this->*mmf.pfn_wv)();break;case AfxSig_vCALC:(this->*mmf.pfn_vCALC)((BOOL)wParam, (NCCALCSIZE_PARAMS*)lParam);break;case AfxSig_vPOS:(this->*mmf.pfn_vPOS)((WINDOWPOS*)lParam);break;case AfxSig_vwwh:(this->*mmf.pfn_vwwh)(LOWORD(wParam), HIWORD(wParam), (HANDLE)lParam);break;case AfxSig_vwp:{CPoint point((DWORD)lParam);(this->*mmf.pfn_vwp)(wParam, point);break;}case AfxSig_vwSIZING:(this->*mmf.pfn_vwl)(wParam, lParam);lResult = TRUE;break;case AfxSig_bwsp:lResult = (this->*mmf.pfn_bwsp)(LOWORD(wParam), (short) HIWORD(wParam),CPoint(LOWORD(lParam), HIWORD(lParam)));if (!lResult)return FALSE;}goto LReturnTrue;LDispatchRegistered:    // for registered windows messagesASSERT(message >= 0xC000);mmf.pfn = lpEntry->pfn;lResult = (this->*mmf.pfn_lwl)(wParam, lParam);LReturnTrue:if (pResult != NULL)*pResult = lResult;return TRUE;}**********************************************************************struct AFX_MSGMAP{#ifdef _AFXDLLconst AFX_MSGMAP* (PASCAL* pfnGetBaseMap)();#elseconst AFX_MSGMAP* pBaseMap;#endifconst AFX_MSGMAP_ENTRY* lpEntries;};struct AFX_MSGMAP_ENTRY{UINT nMessage;//消息IDUINT nCode;//通知码UINT nID;//命令ID/控件IDUINT nLastID;//最后一个控件IDUINT nSig;//消息处理函数的类型AFX_PMSG pfn;//消息处理函数的地址(指针)};struct AFX_MSGMAP_ENTRY{UINT nMessage;   // windows messageUINT nCode;      // control code or WM_NOTIFY codeUINT nID;        // control ID (or 0 for windows messages)UINT nLastID;    // used for entries specifying a range of control id'sUINT nSig;       // signature type (action) or pointer to message #AFX_PMSG pfn;    // routine to call (or special value)};*********************************************************************#ifdef _AFXDLL//定义动态库#define DECLARE_MESSAGE_MAP() \private: \static const AFX_MSGMAP_ENTRY _messageEntries[]; \protected: \static AFX_DATA const AFX_MSGMAP messageMap; \static const AFX_MSGMAP* PASCAL _GetBaseMessageMap(); \virtual const AFX_MSGMAP* GetMessageMap() const; \#else#define DECLARE_MESSAGE_MAP() \private: \static const AFX_MSGMAP_ENTRY _messageEntries[]; \//静态映射数组protected: \static AFX_DATA const AFX_MSGMAP messageMap; \virtual const AFX_MSGMAP* GetMessageMap() const; \#endif#ifdef _AFXDLL#define DECLARE_MESSAGE_MAP() \private: \static const AFX_MSGMAP_ENTRY _messageEntries[]; \protected: \static AFX_DATA const AFX_MSGMAP messageMap; \static const AFX_MSGMAP* PASCAL _GetBaseMessageMap(); \virtual const AFX_MSGMAP* GetMessageMap() const; \#else#define DECLARE_MESSAGE_MAP() \private: \static const AFX_MSGMAP_ENTRY _messageEntries[]; \protected: \static AFX_DATA const AFX_MSGMAP messageMap; \virtual const AFX_MSGMAP* GetMessageMap() const; \#endif#ifdef _AFXDLL#define BEGIN_MESSAGE_MAP(theClass, baseClass) \const AFX_MSGMAP* PASCAL theClass::_GetBaseMessageMap() \{ return &baseClass::messageMap; } \const AFX_MSGMAP* theClass::GetMessageMap() const \{ return &theClass::messageMap; } \AFX_COMDAT AFX_DATADEF const AFX_MSGMAP theClass::messageMap = \{ &theClass::_GetBaseMessageMap, &theClass::_messageEntries[0] }; \AFX_COMDAT const AFX_MSGMAP_ENTRY theClass::_messageEntries[] = \{ \#else#define BEGIN_MESSAGE_MAP(theClass, baseClass) \const AFX_MSGMAP* theClass::GetMessageMap() const \{ return &theClass::messageMap; } \AFX_COMDAT AFX_DATADEF const AFX_MSGMAP theClass::messageMap = \{ &baseClass::messageMap, &theClass::_messageEntries[0] }; \AFX_COMDAT const AFX_MSGMAP_ENTRY theClass::_messageEntries[] = \{ \#endif*********************************************************************#ifdef _AFXDLL#define BEGIN_MESSAGE_MAP(theClass, baseClass) \const AFX_MSGMAP* PASCAL theClass::_GetBaseMessageMap() \{ return &baseClass::messageMap; } \const AFX_MSGMAP* theClass::GetMessageMap() const \{ return &theClass::messageMap; } \AFX_COMDAT AFX_DATADEF const AFX_MSGMAP theClass::messageMap = \{ &theClass::_GetBaseMessageMap, &theClass::_messageEntries[0] }; \AFX_COMDAT const AFX_MSGMAP_ENTRY theClass::_messageEntries[] = \{ \#else#define BEGIN_MESSAGE_MAP(theClass, baseClass) \const AFX_MSGMAP* theClass::GetMessageMap() const \{ return &theClass::messageMap; } \AFX_COMDAT AFX_DATADEF const AFX_MSGMAP theClass::messageMap = \{ &baseClass::messageMap, &theClass::_messageEntries[0] }; \AFX_COMDAT const AFX_MSGMAP_ENTRY theClass::_messageEntries[] = \{ \#endif**********************************************************************#define ON_MESSAGE(message, memberFxn) \{ message, 0, 0, 0, AfxSig_lwl, \(AFX_PMSG)(AFX_PMSGW)(LRESULT (AFX_MSG_CALL CWnd::*)(WPARAM, LPARAM))&memberFxn },***********************************************************************

N_EN_KILLFOCUS(id, memberFxn) \
    ON_CONTROL(EN_KILLFOCUS, id, memberFxn)
#define ON_EN_CHANGE(id, memberFxn) \
    ON_CONTROL(EN_CHANGE, id, memberFxn)
#define ON_EN_UPDATE(id, memberFxn) \
    ON_CONTROL(EN_UPDATE, id, memberFxn)
#define ON_EN_ERRSPACE(id, memberFxn) \
    ON_CONTROL(EN_ERRSPACE, id, memberFxn)
#define ON_EN_MAXTEXT(id, memberFxn) \
    ON_CONTROL(EN_MAXTEXT, id, memberFxn)
#define ON_EN_HSCROLL(id, memberFxn) \
    ON_CONTROL(EN_HSCROLL, id, memberFxn)
#define ON_EN_VSCROLL(id, memberFxn) \
    ON_CONTROL(EN_VSCROLL, id, memberFxn)

#define ON_CONTROL(wNotifyCode, id, memberFxn) \
    { WM_COMMAND, (WORD)wNotifyCode, (WORD)id, (WORD)id, AfxSig_vv, \
        (AFX_PMSG)&memberFxn },
**********************************************************************
进程间通信
HWND FindWindow(
  LPCTSTR lpClassName,  // class name
  LPCTSTR lpWindowName  // window name
);
//注意窗口标题栏不可同名
创建一个按钮，按钮被点击时，向另一个进程窗口发送自定义消息
接收发送的消息，并处理。。弹出提示框。
**********************************************************************
struct AFX_MSGMAP_ENTRY{
    UINT nMessage;//消息ID
    UINT nCode;    //通知码
    UINT nID;    //命令ID/控件ID
    UINT nLastID;    //最后一个控件ID
    UINT nSig;    //消息处理函数的类型
    AFX_PMSG pfn;    //消息处理函数的地址(指针)
};
struct AFX_MSGMAP
{
    const AFX_MSGMAP* pBaseMap;

    const AFX_MSGMAP_ENTRY* lpEntries;
};

两个简单的win32模拟mfc程序 (工程均是链接mfc静态库)

// MFCMessage.cpp : Defines the entry point for the application.//#include "stdafx.h"class CMyFrameWnd:public CFrameWnd{//DECLARE_MESSAGE_MAP()/////////////////////////////////////////replace DECLARE_MESSAGE_MAP()private:  static const AFX_MSGMAP_ENTRY _messageEntries[];  //protected:    static AFX_DATA const AFX_MSGMAP messageMap;        virtual const AFX_MSGMAP* GetMessageMap() const;    /**/////////////////////////////////////////public:int m_xPos;int m_yPos;CMyFrameWnd(int x=100,int y=100);LRESULT OnCreate(WPARAM wParam,LPARAM lParam);LRESULT OnPaint(WPARAM wParam,LPARAM lParam);LRESULT OnMouseMove(WPARAM wParam,LPARAM lParam);};CMyFrameWnd::CMyFrameWnd(int x,int y){m_xPos=x;m_yPos=y;}LRESULT CMyFrameWnd::OnCreate(WPARAM wParam,LPARAM lParam){AfxMessageBox("CMyframeWnd::OnCreate");return 0;}LRESULT CMyFrameWnd::OnMouseMove(WPARAM wParam,LPARAM lParam){m_xPos=LOWORD(lParam);m_yPos=HIWORD(lParam);//m_xPos = ::GET_X_LPARAM(lParam); //m_yPos = ::GET_Y_LPARAM(lParam);::InvalidateRect(m_hWnd,NULL,TRUE);return 0;}LRESULT CMyFrameWnd::OnPaint(WPARAM wParam,LPARAM lParam){PAINTSTRUCT ps={0};HDC hDC=::BeginPaint(m_hWnd,&ps);::TextOut(hDC,m_xPos,m_yPos,"hello",5);::EndPaint(m_hWnd,&ps);return 0;}class CMyWinApp:public CWinApp{public:virtual BOOL InitInstance();CMyWinApp(){}};//BEGIN_MESSAGE_MAP(CMyFrameWnd,CFrameWnd)////本类，基类const AFX_MSGMAP* CMyFrameWnd::GetMessageMap() const { return &CMyFrameWnd::messageMap; } AFX_COMDAT AFX_DATADEF const AFX_MSGMAP CMyFrameWnd::messageMap = { &CFrameWnd::messageMap, &CMyFrameWnd::_messageEntries[0] }; AFX_COMDAT const AFX_MSGMAP_ENTRY CMyFrameWnd::_messageEntries[] = {  /**///ON_MESSAGE(WM_MOUSEMOVE,OnMouseMove)//ON_MESSAGE(WM_CREATE,OnCreate)//ON_MESSAGE(WM_PAINT,OnPaint)//add to the array{ WM_CREATE, 0, 0, 0, AfxSig_lwl, (AFX_PMSG)(AFX_PMSGW)(LRESULT (AFX_MSG_CALL CWnd::*)\(WPARAM, LPARAM))&OnCreate },/**/END_MESSAGE_MAP()/*//#define END_MESSAGE_MAP() {0, 0, 0, 0, AfxSig_end, (AFX_PMSG)0 } }; */CMyWinApp theApp;BOOL CMyWinApp::InitInstance(){CMyFrameWnd *pFrame=new CMyFrameWnd();pFrame->Create(NULL,"MFCMsg");m_pMainWnd=pFrame;pFrame->ShowWindow(SW_SHOW);pFrame->UpdateWindow();return TRUE;}下面是第二个程序 

// MFCMsg.cpp : Defines the entry point for the application.//#include "stdafx.h"#define WM_MYMESSAGE WM_USER+10001class CMyFrameWnd:public CFrameWnd{DECLARE_MESSAGE_MAP()public:afx_msg int OnCreate(LPCREATESTRUCT cs);afx_msg void OnPaint(void);afx_msg void OnTest1();afx_msg void OnTest(UINT nID);afx_msg LRESULT OnMyMessage(WPARAM, LPARAM);afx_msg void OnEnChange( );};BEGIN_MESSAGE_MAP(CMyFrameWnd,CFrameWnd)ON_WM_CREATE()ON_WM_PAINT()ON_COMMAND(1001,OnTest1)ON_COMMAND_RANGE(1002,1003,OnTest)ON_MESSAGE(WM_MYMESSAGE,OnMyMessage)ON_EN_CHANGE(1004,OnEnChange)END_MESSAGE_MAP()int CMyFrameWnd::OnCreate(LPCREATESTRUCT cs){//AfxMessageBox("WM_CREATE");CreateWindowEx(0,"BUTTON","Test1",WS_CHILD|WS_VISIBLE,100,100,100,40,m_hWnd,(HMENU)1001,AfxGetInstanceHandle(),NULL);CreateWindowEx(0,"BUTTON","Test2",WS_CHILD|WS_VISIBLE,100,200,100,40,m_hWnd,(HMENU)1002,AfxGetInstanceHandle(),NULL);CreateWindowEx(0,"BUTTON","Test3",WS_CHILD|WS_VISIBLE,100,300,100,40,m_hWnd,(HMENU)1003,AfxGetInstanceHandle(),NULL);CreateWindowEx(0,"EDIT","Test4",WS_CHILD|WS_VISIBLE|WS_BORDER,300,100,200,100,m_hWnd,(HMENU)1004,AfxGetInstanceHandle(),NULL);return CFrameWnd::OnCreate(cs);}void CMyFrameWnd::OnPaint(void){PAINTSTRUCT ps={0};HDC hDC=::BeginPaint(m_hWnd,&ps);::TextOut(hDC,100,100,"hello",5);::EndPaint(m_hWnd,&ps);//return (void)(CFrameWnd::OnPaint());}void CMyFrameWnd::OnTest1(){AfxMessageBox("Test1");//SendMessage(WM_MYMESSAGE,0,1);//this=pFrameHWND hWnd=::FindWindow(NULL,"MFCCreate");::SendMessage(hWnd,WM_MYMESSAGE,0,1);}void CMyFrameWnd::OnTest(UINT nID){if(1002==nID){AfxMessageBox("Test2 clicked!");}else if(1003==nID){AfxMessageBox("Test3 clicked!");}}LRESULT CMyFrameWnd::OnMyMessage(WPARAM wParam, LPARAM lParam){CString str;str.Format("wParam=%d\tlParam=%d",wParam,lParam);AfxMessageBox(str);return 0;}void CMyFrameWnd::OnEnChange(){AfxMessageBox("content changed!");}class CMyWinApp:public CWinApp{public:virtual BOOL InitInstance();};CMyWinApp theApp;BOOL CMyWinApp::InitInstance(){CMyFrameWnd *pFrame=new CMyFrameWnd();pFrame->Create(NULL,"MFCMsg");m_pMainWnd=pFrame;pFrame->ShowWindow(SW_SHOW);pFrame->UpdateWindow();return TRUE;}