MFC中怎样区分WM_COMMAND是谁产生？

[newHung]

菜单项、工具栏的按钮的点击，都产生WM_COMMAND消息。怎么样区别具体是由谁（哪一个ID）产生的消息。
sdk中可以通过消息的附加参数LOWORD (wParam)来识别，MFC中也是这样吗？可是wParam在哪里可以获得呢？

[cleverwyq]

CWinApp::PreTranslateMessage See Also
CWinApp Overview | Class Members | Hierarchy Chart | DispatchMessage | TranslateMessage
Override this function to filter window messages before they are dispatched to the Windows functions TranslateMessage and DispatchMessage The default implementation performs accelerator-key translation, so you must call the CWinApp::PreTranslateMessage member function in your overridden version.

virtual BOOL PreTranslateMessage(
MSG* pMsg
);
Parameters
pMsg
A pointer to a MSG structure that contains the message to process.


/////////
MSG StructureSee Also
Structures, Styles, Callbacks, and Message Maps
The MSG structure contains message information from a thread's message queue.

typedef struct tagMSG { // msg
HWND hwnd;
UINT message;
WPARAM wParam;
LPARAM lParam;
DWORD time;
POINT pt;
} MSG;
Parameters
hwnd
Identifies the window whose window procedure receives the message.
message
Specifies the message number.
wParam
Specifies additional information about the message. The exact meaning depends on the value of the message member.
lParam
Specifies additional information about the message. The exact meaning depends on the value of the message member.
time
Specifies the time at which the message was posted.
pt
Specifies the cursor position, in screen coordinates, when the message was posted.

[cybermat]

ON_COMMAND(id, memberFxn )宏不是要传弟一个参数的吗?你要是知道ID怎么添加这个宏呢

[m_dbsky]

去看一下MFC内部机制方面的书

[思危]

ON_COMMAND(id, memberFxn ), 中的id就是