think window procedure

核心提示：2.4 好，总结一下，think window procedure(3)，class CWnd : public CCmdTarget{...protected:virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam);virtual

2.4 好，总结一下。

class CWnd : public CCmdTarget
{
　　...

protected:
　　virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam);
　　virtual BOOL OnWndMsg(UINT message, WPARAM wParam, LPARAM lParam, LRESULT* pResult);
　　virtual LRESULT DefWindowProc(UINT message, WPARAM wParam, LPARAM lParam);
　　virtual BOOL OnCommand(WPARAM wParam, LPARAM lParam);
　　virtual BOOL OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult);
　　...
}
LRESULT CALLBACK
AfxWndProc(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam)
{
　　CWnd* pWnd = CWnd::FromHandlePermanent(hWnd);
　　return AfxCallWndProc(pWnd, hWnd, nMsg, wParam, lParam);
}
LRESULT AFXAPI
AfxCallWndProc(CWnd* pWnd, HWND hWnd, UINT nMsg,
　　WPARAM wParam = 0, LPARAM lParam = 0)
{
　　LRESULT lResult;
　　lResult = pWnd->WindowProc(nMsg, wParam, lParam);
　　return lResult;
}
LRESULT CWnd::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
{
　　LRESULT lResult = 0;
　　if (!OnWndMsg(message, wParam, lParam, & lResult))
　　　　lResult = DefWindowProc(message, wParam, lParam);
　　return lResult;
}
BOOL CWnd::OnWndMsg(UINT message, WPARAM wParam, LPARAM lParam, LRESULT* pResult)
{
　　if (message == WM_COMMAND)
　　　　OnCommand(wParam, lParam);
　　else if (message == WM_NOTIFY)
　　　　OnNotify(wParam, lParam, & lResult);
　　else
　　　　...// msg map related
}

LRESULT CWnd::DefWindowProc(UINT nMsg, WPARAM wParam, LPARAM lParam)
{
　　if (m_pfnSuper != NULL)
　　　　return ::CallWindowProc(m_pfnSuper, m_hWnd, nMsg, wParam, lParam);
}