int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
......
	CRect rect;
	m_wndMyToolBar.SetButtonInfo(3,ID_COMBOBOX,TBBS_SEPARATOR,160);
	m_wndMyToolBar.GetItemRect(3,&rect);
	rect.bottom += 100;
	if(!m_ComboBox.Create(CBS_DROPDOWNLIST | WS_VISIBLE |
		WS_TABSTOP | CBS_AUTOHSCROLL, rect, &m_wndMyToolBar,
		ID_COMBOBOX))
		return -1;
	m_ComboBox.AddString("First Item");
	m_ComboBox.AddString("Second Item");
	m_ComboBox.AddString("Third Item");
	m_ComboBox.SetCurSel(0);

......
}
