TRACKMOUSEEVENT //的应用是当鼠标离开时;不启用跟踪光标呀?

TRACKMOUSEEVENT //的使用是当鼠标离开时;不启用跟踪光标呀???

void CDlgShareDev::OnMouseMove()
{
if (!m_bMouseTracking)   
{  
TRACKMOUSEEVENT   tme;   
tme.cbSize   =   sizeof(tme);   
tme.hwndTrack   =   m_hWnd;   
tme.dwFlags   =   TME_LEAVE ;   
_TrackMouseEvent(&tme);    
m_bMouseTracking = true;
}
CDialog::OnMouseMove(nHitTest, point);
}

void CDlgShareDev::OnMouseLeave()
{
m_bMouseTracking = false;
}