Private Sub Form_Load()
    Dim objApp As SolidEdgeFramework.Application
    Dim objDoc As SolidEdgeDraft.DraftDocument
    Dim objCenterLines As SolidEdgeFrameworkSupport.CenterLines
    Dim lngCount As Long
    ' 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.DraftDocument")
        objApp.Visible = True
    Else
        Set objDoc = objApp.ActiveDocument
    End If
    ' getting the CenterLines collection object on the active sheet
    Set objCenterLines = objDoc.ActiveSheet.CenterLines
    ' adding a centerline on the active sheet
    Call objCenterLines.Add(x1:=0.25, y1:=0.15, z1:=0, x2:=0.25, y2:=0.35, z2:=0)
    ' getting the count of the CenterLines in the collection object
    lngCount = objCenterLines.Count
    ' USER DISPLAY
    ' Release objects
    Set objApp = Nothing
    Set objDoc = Nothing
    Set objCenterLines = Nothing
End Sub