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SHELL32!CDefView::_OnFSNotify函数是如何被调用的

news 来源：原创 2025/5/30 10:53:58

第一部分：

void CRegisteredClient::_SendNotification(CNotifyEvent *pne, BOOL fNeedsCallbackEvent, SENDASYNCPROC pfncb)
{

        if (!SendMessageCallback(_hwnd, _wMsg,
                                        (WPARAM)pme->hChange,
                                        (LPARAM)_dwProcId,
                                        pfncb,
                                        (DWORD_PTR)pme))
        {

第二部分：

1: kd> g
Breakpoint 26 hit
SHELL32!CDefView::s_WndProc:
001b:77315328 6a10            push    10h
1: kd> dv
           hWnd = 0x0004005c
           uMsg = 0x4a0
         wParam = 0x5e4
         lParam = 0n1508
           lres = 0n0
         cookie = 0x13bd5a8

   case WM_DSV_FSNOTIFY:
        {
            LPITEMIDLIST *ppidl;
            LONG lEvent;

LPSHChangeNotificationLock pshcnl = SHChangeNotification_Lock((HANDLE)wParam, (DWORD)lParam, &ppidl, &lEvent);
if (pshcnl)

第三部分：

    case WM_DSV_FSNOTIFY:
        {
            LPITEMIDLIST *ppidl;
            LONG lEvent;

            LPSHChangeNotificationLock pshcnl = SHChangeNotification_Lock((HANDLE)wParam, (DWORD)lParam, &ppidl, &lEvent);
            if (pshcnl)
            {
                if (_fDisabled ||
                    (CallCB(SFVM_FSNOTIFY, (WPARAM)ppidl, (LPARAM)lEvent) == S_FALSE))
                {
                    lParam = 0;
                }
                else
                {
                    lParam = _OnFSNotify(lEvent, (LPCITEMIDLIST*)ppidl);       SHELL32!CDefView::_OnFSNotify
                }
                SHChangeNotification_Unlock(pshcnl);
            }
        }
        return lParam;