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Steps:

1. Create toolbar with codes:

m_wndDrawToolBar.ChangeToDropImagePickerButton(ID_NEW_TEST,ID_TESTDROPARROW,
BS_OWNERDRAWN|BS_DROPARROWHORZ,3,IDR_NEW_DRAW,FALSE);

2. Select item for drawing:

void CTestImageDropView::OnNewTest() 
{
	// TODO: Add your command handler code here
	
	m_bClicked = FALSE;

	CMainFrame* pFrameWnd = (CMainFrame*) AfxGetMainWnd();	
	if(!pFrameWnd->m_wndDrawToolBar.IsVertDock())
	{
		m_bClicked = !m_bClicked;
		if(m_bClicked)
		{
			DoDraw(m_nCurItemIndex);
		}
	}
}

void CTestImageDropView::OnUpdateNewTest(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here

	BOOL bSelect = (m_drawshape == FO_COMP_NONE || FO_COMP_PORT);

	BOOL bDesign = GetCurrentModel()->IsDesignMode();
	pCmdUI->Enable(bDesign);

	if(bDesign)
	{
		if(m_action_state == State_SelectNone)
		{
			m_bDrawing = FALSE;
		}
		pCmdUI->SetCheck(!bSelect || m_bDrawing);
	}

	if(!(!bSelect || m_bDrawing))
	{
		CMainFrame* pFrameWnd = (CMainFrame*) AfxGetMainWnd();	
		if(!pFrameWnd->m_wndDrawToolBar.IsVertDock())
		{
			if(m_bClicked)
			{
				if(m_action_state == State_SelectNone)
				{
					m_bClicked = FALSE;
				}
				
				pCmdUI->SetCheck(m_bClicked);
			}
		}
	}
}

void CTestImageDropView::OnDrawItemChange()
{
	int nIndex;
	CMainFrame* pFrameWnd = (CMainFrame*) AfxGetMainWnd();
	pFrameWnd->m_wndDrawToolBar.SendMessageToButtons(ID_NEW_TEST,CFOPComplexWellButton::IGetIndex, &nIndex);

	OnFOPFoDrawSelect();

	if(m_nCurItemIndex == nIndex)
	{
		DoDraw(m_nCurItemIndex);
		return;
	}
	else
	{
		DoDraw(nIndex);
		m_nCurItemIndex = nIndex;
		m_bDrawing		= TRUE;
	
	}
}