else if (m_hfStyle & wxHF_ICONS_BOOK_CHAPTER)
image = (it->m_Level == 1) ? IMG_Book : IMG_Folder;
m_ContentsBox->SetItemImage(roots[it->m_Level], image);
else if (m_hfStyle & wxHF_ICONS_BOOK_CHAPTER)
image = (it->m_Level == 1) ? IMG_Book : IMG_Folder;
m_ContentsBox->SetItemImage(roots[it->m_Level], image);