Question : CListCtrl Why is SetSelectionMark() not working

The CListCtrl has 10 items in it.
First item in the list is clicked on and selected (index for item is 0 ).
Code needs to change that selection to item 4  

m_List.SetSelectionMark( 3 );  // does nothing

int Sel = m_List.GetSelectionMark(); // return 0 so the selection is still the first item

I tried:
m_List.UpdateData(TRUE); // does not move the selection highlight
m_List.UpdateWindow(); // does not move the selection highlight

I tried:
::PostMessage( m_List.m_hWnd, LVM_SETSELECTIONMARK, 0, (LPARAM) 3);  // does nothing item 0 is still selected.

I tried:

m_List.SetItemState( 3, LVIS_FOCUSED | LVIS_SELECTED, LVIF_STATE); // does nothing item 0 is still selected.


What in the world must I do to change the selection.

Answer : CListCtrl Why is SetSelectionMark() not working

Sorry, try

            m_list.SetSelectionMark(nItem);
            m_list.SetItemState(nItem, LVIS_SELECTED|LVIS_FOCUSED, LVIS_SELECTED|LVIS_FOCUSED);