//creating 3d objects
InstallationSpace oInstallationSpace = new InstallationSpace();
oInstallationSpace.Create(m_oTestProject, "DataModel_081MountingRail_Test001");
Cabinet oCabinet = new Cabinet();
oCabinet.Create(m_oTestProject, "TS 8286.500", "1");
oCabinet.Parent = oInstallationSpace;

//creating view placement
ViewPlacement oViewPlacement = new ViewPlacement();
oViewPlacement.Create(m_oTestProject, m_InstallationSpace);
oViewPlacement.Page = oPage;
oViewPlacement.Area = new RectangleD(new PointD(0.0, 0.0), new PointD(200.0, 200.0));
oViewPlacement.RootElements = new Placement3D[]{oCabinet};
oViewPlacement.Update();