1.h

来自「关于MFC的基本功能的源代码」· C头文件 代码 · 共 39 行

LRESULT CALLBACK
_AfxCbtFilterHook(int code, WPARAM wParam, LPARAM lParam)
{
	_AFX_THREAD_STATE* pThreadState = _afxThreadState.GetData();
	if (code != HCBT_CREATEWND)
	{
		// wait for HCBT_CREATEWND just pass others on...
		return CallNextHookEx(pThreadState->m_hHookOldCbtFilter, code,
			wParam, lParam);
	}

	
	if (!afxData.bWin4 && !bContextIsDLL &&
		(pCtl3dState = _afxCtl3dState.GetDataNA()) != NULL &&
		pCtl3dState->m_pfnSubclassDlgEx != NULL &&
		(dwFlags = AfxCallWndProc(pWndInit, hWnd, WM_QUERY3DCONTROLS)) != 0)
	{
		// was the class registered with AfxWndProc?
		WNDPROC afxWndProc = AfxGetAfxWndProc();
		BOOL bAfxWndProc = ((WNDPROC)
			GetWindowLong(hWnd, GWL_WNDPROC) == afxWndProc);
		
		pCtl3dState->m_pfnSubclassDlgEx(hWnd, dwFlags);
		
		// subclass the window if not already wired to AfxWndProc
		if (!bAfxWndProc)
		{
			// subclass the window with standard AfxWndProc
			oldWndProc = (WNDPROC)SetWindowLong(hWnd, GWL_WNDPROC,
				(DWORD)afxWndProc);
			ASSERT(oldWndProc != NULL);
			*pOldWndProc = oldWndProc;
		}
	}

lCallNextHook:
	LRESULT lResult = CallNextHookEx(pThreadState->m_hHookOldCbtFilter, code,
		wParam, lParam);
}