mfc深入浅出 frame7解决办法

mfc深入浅出 frame7
mfc深入浅出
FRAME7


#define   ON_COMMAND(id,   memberFxn)   \
{   WM_COMMAND,   0,   (WORD)id,   (WORD)id,   AfxSig_vv,   (AFX_PMSG)memberFxn   },


#define   END_MESSAGE_MAP()   \
{   0,   0,   0,   0,   AfxSig_end,   (AFX_PMSG)0   }   \
};
/*其中AFX_PMSG是函数指针   是否是在END_MESSAGE_MAP()   将其置零？
那么其他参数的意思是？




[解决办法]
置零是为了标示消息隐射表结束

{ WM_COMMAND, 0, (WORD)id, (WORD)id, AfxSig_vv, (AFX_PMSG)memberFxn },

参数什么意思看这个


struct AFX_MSGMAP_ENTRY
{
UINT nMessage; // windows message
UINT nCode; // control code or WM_NOTIFY code
UINT nID; // control ID (or 0 for windows messages)
UINT nLastID; // used for entries specifying a range of control id 's
UINT_PTR nSig; // signature type (action) or pointer to message #
AFX_PMSG pfn; // routine to call (or special value)
};