BOOL CMyTreeViewCtrl::PreCreateWindow(CREATESTRUCT& cs)
{
    // サブクラス化
    cs.lpszClass = _T("SysTreeView32");
    cs.style |= WS_CHILD | WS_VISIBLE | WS_BORDER | TVS_LINESATROOT | TVS_HASLINES | TVS_HASBUTTONS;
    return COleControl::PreCreateWindow(cs);
}


int CMyTreeViewCtrl::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
    if (COleControl::OnCreate(lpCreateStruct) == -1)
        return -1;
        
    // TreeView 作成
    m_pTreeCtrl = (CTreeCtrl*)this;

    // ImageList 作成
    m_imagelist.Create(IDB_TREEICON, 16, 100, RGB(255, 255, 255));
    m_pTreeCtrl->SetImageList(&m_imagelist, TVSIL_NORMAL);

    SetAppearance(1);
    return 0;
}

HTREEITEM CMyTreeViewCtrl::InsertItem(HTREEITEM hParent, LPSTR pszText, int iImage, int iSelImage, LPARAM pos)
{
    TV_INSERTSTRUCT treeitem;
    memset(&treeitem, 0, sizeof(treeitem));
    
    treeitem.hParent = hParent;
    treeitem.hInsertAfter = TVI_SORT;
    treeitem.item.mask = TVIF_TEXT | TVIF_IMAGE | TVIF_SELECTEDIMAGE | TVIF_PARAM;
    treeitem.item.pszText = pszText;
    treeitem.item.iImage = iImage;
    treeitem.item.iSelectedImage = iSelImage;
    treeitem.item.lParam = pos;
        
    return m_pTreeCtrl->InsertItem(&treeitem);
}