The LVM_HITTEST message determines which list view item, if any, is at a specified position. You can send this message explicitly or by using the ListView_HitTest macro.
LVM_HITTEST
wParam = 0;
lParam = (LPARAM) (LV_HITTESTINFO FAR *) pinfo;
Parameters
pinfo
Pointer to an LV_HITTESTINFO structure that contains the position to hit test and receives information about the results of the hit test.
Return Values
Returns the index of the item at the specified position, if any, or -1 otherwise.
See Also