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Steps:

1. Design any symbols with ShapeDesigner.

2. Design Xdg file with DiagramEditor, and load with codes:

void CLiquidFlowView::OnInitialUpdate()
{
	SetCurrentModel(GetDocument()->m_pDataModel);
	CFODrawView::OnInitialUpdate();
	LoadXdgFromResource(IDR_MAIN, _T("XdgRes"), FALSE);
	this->SetZoomScale(100);
	//	GetCurrentModel()->SetBkColor(RGB(160,224,255));
	GetCurrentModel()->SetDesignMode(FALSE);
	SetTimer(ID_TIMER_ID, 100, NULL);

	int xy = 0;
	for(xy = 0; xy < GetCurrentModel()->GetShapes()->Count(); xy ++)
	{
		CFODrawShape *pShape = (CFODrawShape *)GetCurrentModel()->GetShapes()->GetObject(xy);
		if(HAS_BASE(pShape, CFOPLiquidLinkShape))
		{
			m_list.AddTail(pShape);
		}
	}
}

3.Animate with codes:

void CLiquidFlowView::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	if(nIDEvent == ID_TIMER_ID)
	{
		if(m_list.GetCount() <= 0)
		{
			return;
		}

		POSITION pos = m_list.GetHeadPosition();
		while(pos != NULL)
		{
			CFOPLiquidLinkShape *pShape = (CFOPLiquidLinkShape *)m_list.GetNext(pos);
			pShape->DoAnimate();
//			pShape->UpdateComp();
		}

		FOPInvalidate(FALSE);
	}
	else
	{
		CFODrawView::OnTimer(nIDEvent);
	}
	
}