How do i make the loading of treecontrol more faster!

int CDerivedfromTreeView::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
    unsigned int    i,k;
    CTreeCtrl &controlList = (CTreeCtrl &) GetTreeCtrl(); 
    if (CTreeView::OnCreate(lpCreateStruct) == -1)
        return -1;
    controlList.ModifyStyle(0L, TVS_HASLINES | TVS_LINESATROOT | TVS_HASBUTTONS | TVS_NOTOOLTIPS | TVS_SHOWSELALWAYS ); 
    controlList.SetRedraw(TRUE);
    if(controlList.GetCount() )
    controlList.DeleteAllItems();
    controlList.SetRedraw(FALSE);

    for(i=0;i<global_Total_No_Of_Items;i++)
    {
        controlList.InsertItem( (LPCTSTR)items[i].name ,TVI_ROOT,TVI_LAST);
        
    }
        controlList.SetRedraw(TRUE);
    SplitterWindow = CView::GetParentSplitter(this, TRUE);
    return 0;
}