Guys,I want to extrude a center rectangle using api.

#To draw a center rectangle and exit the sketch

   swApp.Visible = True

        swModel = swApp.INewPart()

        swModel = swApp.IActiveDoc2

        swExt = swModel.Extension

        swSelMgr = swModel.SelectionManager

        skManager = swModel.SketchManager

        boolstatus = swExt.SelectByID2("Front Plane", "PLANE", 0, 0, 0, False, 0, Nothing, 0)

        skManager.InsertSketch(True)

        Centerrectangle()  # sub program called for drawing a center rectangle

        skManager.InsertSketch(True)

# Zoom to fit and isometric view, rotate the component

        swModel.ViewZoomtofit2()

        swModel.ShowNamedView2("*Trimetric", 8)

        swModel.ViewRotate()

# Select all edges and points  for the current center rectangle

        boolstatus = swExt.SelectByID2("Edge", swSelectType_e.swSelEDGES, 0, 0, 0, False, 0, Nothing, 0)

        boolstatus = swExt.SelectByID2("Points", swSelectType_e.swSelSKETCHPOINTS, 0, 0, 0, False, 0, Nothing, 0)

# Converting depths from 'm' to 'mm'

        Dim D1 As Double = depth1.Text / 1000

        Dim D2 As Double = depth1.Text / 1000

# Extrusion feature

        myfeature = features1.FeatureExtrusion3(True, False, False, swEndConditions_e.swEndCondBlind, swEndConditions_e.swEndCondBlind, D1, D2, False, False, False, False, 0, 0, False, False, False, False, True, True, True, swStartConditions_e.swStartSketchPlane, 0, False)

I've selected all the points and edges on the curve and given a  extrusion feature program, but the extrusion feature fails to execute.

Did I miss something?