右键打开托盘菜单,遇到野指针错误

[qq82850696]

断点堆栈:
void CMenuWnd::ResizeMenu()
{
CControlUI* pRoot = m_pm.GetRoot();

#if defined(WIN32) && !defined(UNDER_CE)
MONITORINFO oMonitor = {};
oMonitor.cbSize = sizeof(oMonitor);
::GetMonitorInfo(::MonitorFromWindow(*this, MONITOR_DEFAULTTOPRIMARY), &oMonitor);
CDuiRect rcWork = oMonitor.rcWork;
#else
CDuiRect rcWork;
GetWindowRect(m_pOwner->GetManager()->GetPaintWindow(), &rcWork);
#endif
SIZE szAvailable = { rcWork.right - rcWork.left, rcWork.bottom - rcWork.top };
szAvailable = pRoot->EstimateSize(szAvailable);
m_pm.SetInitSize(szAvailable.cx, szAvailable.cy);

	//必须是Menu标签作为xml的根节点
	CMenuUI *pMenuRoot = static_cast<CMenuUI*>(pRoot);
	ASSERT(pMenuRoot);

	SIZE szInit = m_pm.GetInitSize();
	CDuiRect rc;
	CDuiPoint point = m_BasedPoint;
	rc.left = point.x;
	rc.top = point.y;
	rc.right = rc.left + szInit.cx;
	rc.bottom = rc.top + szInit.cy;

	int nWidth = rc.GetWidth();
	int nHeight = rc.GetHeight();

	if (m_dwAlignment & eMenuAlignment_Right)
	{
		rc.right = point.x;
		rc.left = rc.right - nWidth;
	}

	if (m_dwAlignment & eMenuAlignment_Bottom)
	{
		rc.bottom = point.y;
		rc.top = rc.bottom - nHeight;
	}
	m_wndSize.cx = rc.GetWidth();
	m_wndSize.cy = rc.GetHeight() + pMenuRoot->GetInset().bottom + pMenuRoot->GetInset().top;

	SetForegroundWindow(m_hWnd);  //运行到这句遇到野指针,不是每次都有,偶尔有碰到
	MoveWindow(m_hWnd, rc.left, rc.top, rc.GetWidth(), rc.GetHeight(), FALSE);
	SetWindowPos(m_hWnd, HWND_TOPMOST, rc.left, rc.top, rc.GetWidth(), m_wndSize.cy, SWP_SHOWWINDOW);

}

LRESULT CALLBACK CShadowUI::ParentProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
....
#pragma warning(disable: 4312) // temporrarily disable the type_cast warning in Win32
// Call the default(original) window procedure for other messages or messages processed but not returned
return ((WNDPROC)pThis->m_OriParentProc)(hwnd, uMsg, wParam, lParam); //断在这一句,变量 m_OriParentProc=0,uUmsg=70
#pragma warning(default: 4312)
}

[qdtroy]

测试未发现此问题