Private Sub Form_Load()
    Dim objApp As SolidEdgeFramework.Application
    Dim objDoc As SolidEdgeAssembly.AssemblyDocument
    Dim objPhyProps As SolidEdgeAssembly.PhysicalProperties
    Const TESTFILE = "T:\vbtests\testcases\Sample.asm"
    Dim bVolume 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.AssemblyDocument")
        objApp.Visible = True
    Else
        Set objDoc = objApp.ActiveDocument
    End If
    ' Close the active document
    Call objDoc.Close
    ' Opening an existing assembly file
    Set objDoc = objApp.Documents.Open(TESTFILE)
    ' Getting the PhysicalProperties object of the assembly document
    Set objPhyProps = objDoc.PhysicalProperties
    ' Getting DisplayCenterOfVolume property of PhysicalProperties object
    bVolume = objPhyProps.DisplayCenterOfVolume
    objPhyProps.DisplayCenterOfVolume = Not bVolume

    ' USER DISPLAY
    ' Release objects
    Set objApp = Nothing
    Set objDoc = Nothing
    Set objPhyProps = Nothing
End Sub