converting edges to wires

Hi,

I got edge information of a TopoDS Shape,but I'm unable to group them into wires.ie I get all edges but cannot differenciate which wire it belongs to?
this is the code I used:

Standard_Boolean isd = true;
TopTools_MapOfShape moe;
TopExp_Explorer ex(R,TopAbs_EDGE);
BRepBuilderAPI_MakeWire Wire;
while (ex.More())
{
moe.Add(ex.Current());
TopoDS_Shape res1 = ex.Current();
Handle(AIS_Shape) ais1=new AIS_Shape(res1);
myAISContext->SetColor(ais1,Quantity_NOC_YELLOW,Standard_False);
// myAISContext->Display(ais1,Standard_False);
cout ex.Next();