Private Sub Form_Load()
    Dim objApp As SolidEdgeframework.Application
    Dim objDoc As SolidEdgePart.PartDocument
    Dim objPBCurve As solidedgegeometry.ParamBSplineCurve
    Dim bIsPeriodic As Boolean
    Const TESTFILE = "T:\vbtests\testcases\freeform.par"
    ' 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
    Call objDoc.Close
    ' opening the test case file
    Set objDoc = objApp.Documents.Open(TESTFILE)
    ' getting a ParamBSplineCurve from the test case
    Set objPBCurve = objDoc.Models(1).Body.Shells(1).Faces(1).Loops(1).EdgeUses(1).Geometry
    ' checking whether the BSpline curve is periodic
    bIsPeriodic = objPBCurve.GetIsPeriodic
    ' USER DISPLAY
    ' Release objects
    Set objApp = Nothing
    Set objDoc = Nothing
    Set objPBCurve = Nothing
End Sub