Private Sub Form_Load()
    Dim objApp As SolidEdgeFramework.Application
    Dim objDoc As SolidEdgePart.PartDocument
    Dim objBody As SolidEdgeGeometry.Body
    Dim objFaces As Object
    Dim objBSplnSrf As SolidEdgeGeometry.BSplineSurface
    Const TESTFILE = "T:\vbtests\testcases\Curve3d.par"
    Dim bClosed() As Boolean
    ' Report errors
    Const PI = 3.14159265358979
    ' Create/get the application with specific settings
    On Error Resume Next
    Set objApp = GetObject(, "SolidEdge.Application")
    If Err Then
        Err.Clear
        Set objApp = CreateObject("SolidEdge.Application")
        Set objDoc = objApp.Documents.Add("SolidEdge.PartDocument")
        objApp.Visible = True
    Else
        Set objDoc = objApp.ActiveDocument
    End If
    ' Open the TestFile
    Set objDoc = objApp.Documents.Open(TESTFILE)
    ' Get the Model object
    Set objBody = objDoc.Models(1).Body
    ' Get the Faces Collection object
    Set objFaces = objBody.Faces(FaceType:=igQuerySpline)
    ' Get a BSpline Surace
    Set objBSplnSrf = objFaces(1).Geometry
    ' Get the Closure of BSpline Surface
    Call objBSplnSrf.GetIsClosed(bClosed())
    ' USER DISPLAY
    ' Release objects
    Set objApp = Nothing
    Set objDoc = Nothing
    Set objBody = Nothing
    Set objFaces = Nothing
    Set objBSplnSrf = Nothing
End Sub