//get symbol variant for topology functions
string strSymbolLibName = "SPECIAL";
string strSymbolName = "CABSTND";
int nVariant = 0;
Symbol oFunctionsTopologicPageSymbol = new Symbol(new SymbolLibrary(m_oTestProject, strSymbolLibName), strSymbolName);
SymbolVariant oFunctionsTopologicPageSymbolVariant = new SymbolVariant();
oFunctionsTopologicPageSymbolVariant.Initialize(oFunctionsTopologicPageSymbol, nVariant);

//create topology representation of oFunction1
Function oTopologyFunc1 = new Function();
oTopologyFunc1.Create(m_oTestProject, oFunction1.FunctionDefinition);
oTopologyFunc1.SymbolVariant = oFunctionsTopologicPageSymbolVariant;
oTopologyFunc1.Page = oTopologyPage;
oTopologyFunc1.Location = new PointD(100, 100);
oTopologyFunc1.ManualPlacementType = DocumentTypeManager.DocumentType.Topology;
oTopologyFunc1.IsMainFunction = false;
oTopologyFunc1.Name = oFunction1.Properties.FUNC_FULLDEVICETAG;
new NameService().AdjustVisibleName(oTopologyFunc1);

//create topology representation of oFunction2
Function oTopologyFunc2 = new Function();
oTopologyFunc2.Create(m_oTestProject, oFunction2.FunctionDefinition);
oTopologyFunc2.SymbolVariant = oFunctionsTopologicPageSymbolVariant;
oTopologyFunc2.Page = oTopologyPage;
oTopologyFunc2.Location = new PointD(200, 100);
oTopologyFunc2.ManualPlacementType = DocumentTypeManager.DocumentType.Topology;
oTopologyFunc2.IsMainFunction = false;
oTopologyFunc2.Name = oFunction2.Properties.FUNC_FULLDEVICETAG;
new NameService().AdjustVisibleName(oTopologyFunc2);

//get symbol variant for topology corners
strSymbolLibName = "SPECIAL";
strSymbolName = "CABSP";
nVariant = 0;
Symbol oCornerSymbol = new Symbol(new SymbolLibrary(m_oTestProject, strSymbolLibName), strSymbolName);
SymbolVariant oCornerSymbolVariant = new SymbolVariant();
oCornerSymbolVariant.Initialize(oCornerSymbol, nVariant);

//create corner 1
Function oCorner1 = Function.Create(oCornerSymbolVariant, oTopologyPage) as Function;
oCorner1.ManualPlacementType = DocumentTypeManager.DocumentType.Topology;
oCorner1.Location = new PointD(100.0, 150.0);

//create corner 1
Function oCorner2 = Function.Create(oCornerSymbolVariant, oTopologyPage) as Function;
oCorner2.ManualPlacementType = DocumentTypeManager.DocumentType.Topology;
oCorner2.Location = new PointD(200.0, 150.0);

//create segments
Segment oSegment1 = new Segment();
oSegment1.Create(m_oTestProject, oTopologyFunc1, oCorner1);
oSegment1.Page = oTopologyPage;

Segment oSegment2 = new Segment();
oSegment2.Create(m_oTestProject, oCorner1, oCorner2);
oSegment2.Page = oTopologyPage;

Segment oSegment3 = new Segment();
oSegment3.Create(m_oTestProject, oCorner2, oTopologyFunc2);
oSegment3.Page = oTopologyPage;

//update start and end points of segments
new TopologyService().UpdatePage(oTopologyPage);