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And

Steps:

1. Initial the canvas:

void CTestTreeLayoutView::DoChangeModel(CFODataModel * pModel)
{
	CFODrawView::DoChangeModel(pModel);
	// Adding your data model init codes here..
	CSize szCanvas = CSize(3000,3000);
	pModel->SetCanvasSize(szCanvas);
	GetCurrentModel()->SetBorderShow(FALSE);
	GetCurrentModel()->SetPageBkColor(RGB(255,255,255));
	GetCurrentModel()->SetGridColor(RGB(0,0,0));
	GetCurrentModel()->SetGridLineType(GRID_DOT);
	pModel->ShowGrid(FALSE);
}

2. Do tree layout:

void CTestTreeLayoutView::OnTestTree() 
{
	// TODO: Add your command handler code here
	CFOPHorzLayout layout;
	layout.Initialize(*GetCurrentModel()->GetFormObjects());
	layout.DoLayout();

	FOPInvalidate();
}

void CTestTreeLayoutView::OnTestTree1() 
{
	// TODO: Add your command handler code here
	CFOPVertLayout layout;
	layout.Initialize(*GetCurrentModel()->GetFormObjects());
	layout.DoLayout();

	FOPInvalidate();
}