CCheclListBox, ItemFromPoint not accurate?

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C++

MFC

VisualC++

Hi,

I've tried to set tool tip in my CCheclListBox using "ItemFromPoint", but it is always telling me that my mouse is outside the CCheckListBox.

// In Header File
CToolTipCtrl* m_pGrpToolTip;
CCheckListBox m_listGrpBox;
BOOL m_bOutside;


// In Init Dialog
m_pGrpToolTip = new CToolTipCtrl();
EnableToolTips(TRUE);

//create tool tip object
m_pGrpToolTip->Create(this);
m_pGrpToolTip->AddTool(&m_listGrpBox);
m_pGrpToolTip->Activate(true);


void CEffectDlg::OnMouseMove(UINT nFlags, CPoint point)
{
	SetCapture();
	UINT uCurItem = m_listGrpBox.ItemFromPoint(point, m_bOutside);
	CString test;
	if (!m_bOutside)
	{
		m_listGrpBox.GetText(uCurItem , test);
		m_pGrpToolTip->UpdateTipText(test, &m_listGrpBox);
		ReleaseCapture();
	}

	CDialog::OnMouseMove(nFlags, point);
}

m_bOutside is always "1", even though my mouse is inside the CCheckListBox.

Am i doing anything wrong?
Any help is greatly appreciated. Thank you.