关于CMessageMap的小问题！

[kim_jinye]

#define BEGIN_MSG_MAP(theClass) \
public: \
BOOL ProcessWindowMessage(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT& lResult, DWORD dwMsgMapID = 0) \
{ \
BOOL bHandled = TRUE; \
(hWnd); \
(uMsg); \
(wParam); \
(lParam); \
(lResult); \
(bHandled); \
switch(dwMsgMapID) \
{ \
case 0:

#define ALT_MSG_MAP(msgMapID) \
break; \
case msgMapID:

#define MESSAGE_HANDLER(msg, func) \
if(uMsg == msg) \
{ \
bHandled = TRUE; \
lResult = func(uMsg, wParam, lParam, bHandled); \
if(bHandled) \
return TRUE; \
}

#define MESSAGE_RANGE_HANDLER(msgFirst, msgLast, func) \
if(uMsg >= msgFirst && uMsg <= msgLast) \
{ \
bHandled = TRUE; \
lResult = func(uMsg, wParam, lParam, bHandled); \
if(bHandled) \
return TRUE; \
}

#define COMMAND_HANDLER(id, code, func) \
if(uMsg == WM_COMMAND && id == LOWORD(wParam) && code == HIWORD(wParam)) \
{ \
bHandled = TRUE; \
lResult = func(HIWORD(wParam), LOWORD(wParam), (HWND)lParam, bHandled); \
if(bHandled) \
return TRUE; \
}

#define COMMAND_ID_HANDLER(id, func) \
if(uMsg == WM_COMMAND && id == LOWORD(wParam)) \
{ \
bHandled = TRUE; \
lResult = func(HIWORD(wParam), LOWORD(wParam), (HWND)lParam, bHandled); \
if(bHandled) \
return TRUE; \
}

#define COMMAND_CODE_HANDLER(code, func) \
if(uMsg == WM_COMMAND && code == HIWORD(wParam)) \
{ \
bHandled = TRUE; \
lResult = func(HIWORD(wParam), LOWORD(wParam), (HWND)lParam, bHandled); \
if(bHandled) \
return TRUE; \
}

#define COMMAND_RANGE_HANDLER(idFirst, idLast, func) \
if(uMsg == WM_COMMAND && LOWORD(wParam) >= idFirst && LOWORD(wParam) <= idLast) \
{ \
bHandled = TRUE; \
lResult = func(HIWORD(wParam), LOWORD(wParam), (HWND)lParam, bHandled); \
if(bHandled) \
return TRUE; \
}

#define COMMAND_RANGE_CODE_HANDLER(idFirst, idLast, code, func) \
if(uMsg == WM_COMMAND && code == HIWORD(wParam) && LOWORD(wParam) >= idFirst && LOWORD(wParam) <= idLast) \
{ \
bHandled = TRUE; \
lResult = func(HIWORD(wParam), LOWORD(wParam), (HWND)lParam, bHandled); \
if(bHandled) \
return TRUE; \
}

#define NOTIFY_HANDLER(id, cd, func) \
if(uMsg == WM_NOTIFY && id == ((LPNMHDR)lParam)->idFrom && cd == ((LPNMHDR)lParam)->code) \
{ \
bHandled = TRUE; \
lResult = func((int)wParam, (LPNMHDR)lParam, bHandled); \
if(bHandled) \
return TRUE; \
}

#define NOTIFY_ID_HANDLER(id, func) \
if(uMsg == WM_NOTIFY && id == ((LPNMHDR)lParam)->idFrom) \
{ \
bHandled = TRUE; \
lResult = func((int)wParam, (LPNMHDR)lParam, bHandled); \
if(bHandled) \
return TRUE; \
}

#define NOTIFY_CODE_HANDLER(cd, func) \
if(uMsg == WM_NOTIFY && cd == ((LPNMHDR)lParam)->code) \
{ \
bHandled = TRUE; \
lResult = func((int)wParam, (LPNMHDR)lParam, bHandled); \
if(bHandled) \
return TRUE; \
}

#define NOTIFY_RANGE_HANDLER(idFirst, idLast, func) \
if(uMsg == WM_NOTIFY && ((LPNMHDR)lParam)->idFrom >= idFirst && ((LPNMHDR)lParam)->idFrom <= idLast) \
{ \
bHandled = TRUE; \
lResult = func((int)wParam, (LPNMHDR)lParam, bHandled); \
if(bHandled) \
return TRUE; \
}

#define NOTIFY_RANGE_CODE_HANDLER(idFirst, idLast, cd, func) \
if(uMsg == WM_NOTIFY && cd == ((LPNMHDR)lParam)->code && ((LPNMHDR)lParam)->idFrom >= idFirst && ((LPNMHDR)lParam)->idFrom <= idLast) \
{ \
bHandled = TRUE; \
lResult = func((int)wParam, (LPNMHDR)lParam, bHandled); \
if(bHandled) \
return TRUE; \
}

#define CHAIN_MSG_MAP(theChainClass) \
{ \
if(theChainClass::ProcessWindowMessage(hWnd, uMsg, wParam, lParam, lResult)) \
return TRUE; \
}

#define CHAIN_MSG_MAP_MEMBER(theChainMember) \
{ \
if(theChainMember.ProcessWindowMessage(hWnd, uMsg, wParam, lParam, lResult)) \
return TRUE; \
}

#define CHAIN_MSG_MAP_ALT(theChainClass, msgMapID) \
{ \
if(theChainClass::ProcessWindowMessage(hWnd, uMsg, wParam, lParam, lResult, msgMapID)) \
return TRUE; \
}

#define CHAIN_MSG_MAP_ALT_MEMBER(theChainMember, msgMapID) \
{ \
if(theChainMember.ProcessWindowMessage(hWnd, uMsg, wParam, lParam, lResult, msgMapID)) \
return TRUE; \
}

#define CHAIN_MSG_MAP_DYNAMIC(dynaChainID) \
{ \
if(CDynamicChain::CallChain(dynaChainID, hWnd, uMsg, wParam, lParam, lResult)) \
return TRUE; \
}

#define END_MSG_MAP() \
break; \
default: \
ATLTRACE(ATL::atlTraceWindowing, 0, _T("Invalid message map ID (%i)\n"), dwMsgMapID); \
ATLASSERT(FALSE); \
break; \
} \
return FALSE; \
}

以上是CMessageMap的一段宏定义，请教大虾们具体的解释，以一两个宏为例就可以了，谢谢！

[雪影]

建议楼主多看看书，
再怎么说也没有书上解析的清楚，这也不是一两句话能解析清楚的事情

[kim_jinye]

我只是想问问这些宏的语法格式是怎么回事？

[kim_jinye]

哎哎哎哎哎~~~~~~~~~~~