静态获取MFC的MESSAGE_MAP表

BEGIN_MESSAGE_MAP(CMFChelloDlg, CDialogEx)
  ON_WM_SYSCOMMAND()
  ON_WM_PAINT()
  ON_WM_QUERYDRAGICON()
  ON_BN_CLICKED(IDOK, &CMFChelloDlg::OnBnClickedOk)
  ON_WM_DROPFILES()
END_MESSAGE_MAP()

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)
};