ListCtrl MouseDown message

My problem is to find out which item user clicked in a listview control. This listview control is located in a dialog box. I saw some code that shows that I can use mouse down message to find out what item was clicked.
How can I get a mouse down message in a listview control if I have this control in a dialog box. When I look for messages available for this control, the click message is available but no mouse move or mouse down is available. I can not use click to find out which item the user clicked.

All suggestions, pointers are highly appreciated