Getting Hot Item From MenuItem, on mouse over event

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C++

MFC

Hi Experts
I am developing a project in MFC where am facing some problem and i need help. Hope am at the right place to ask the question
I am using the following code to get text under mouse from listview control

int nIndex::SendMessage (hwndLstBox,LVM_GETHOTITEM,0,0);

where hwndLstBox is the handle of that listview control

This line should return index of current item which is under mouse or which is highlighted under mouse, but it is not returning index as i aspected.
It is returning 0 always!!!
Kindly let me know what to do.
Thanks