MFC的消息映射机制

1.头文件中：

//{{AFX_MSG(CMainFrame)​

afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);

// NOTE - the ClassWizard will add and remove member functions here.

//    DO NOT EDIT what you see in these blocks of generated code!

//}}AFX_MSG

afx_msg void OnHello();

DECLARE_MESSAGE_MAP()

2.源文件中

BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)

//{{AFX_MSG_MAP(CMainFrame)

// NOTE - the ClassWizard will add and remove mapping macros here.

//    DO NOT EDIT what you see in these blocks of generated code !

ON_WM_CREATE()

//}}AFX_MSG_MAP

ON_COMMAND(IDM_HELLO,OnHello)

END_MESSAGE_MAP()

3.源文件中

void CMainFrame::OnHello()

{

MessageBox("MainFrame hello");

}