Imports System.IO
Imports System.Runtime.InteropServices

Module Example
    <STAThread()> _
    Sub Main()

        Dim objApplication As SolidEdgeFramework.Application
        Dim objAssemblyDocument As SolidEdgeAssembly.AssemblyDocument
        Dim objRelations3d As SolidEdgeAssembly.Relations3d
        Dim objRigidSetRelation3d As SolidEdgeAssembly.RigidSetRelation3d
        Dim objRelation As Object

        Try
            OleMessageFilter.Register()

            objApplication = Marshal.GetActiveObject("SolidEdge.Application")
            objAssemblyDocument = objApplication.ActiveDocument
            objRelations3d = objAssemblyDocument.Relations3d

            For i = 1 To objRelations3d.Count
                objRelation = objRelations3d.Item(i)

                If objRelation.Type = SolidEdgeFramework.ObjectType.igRigidSetRelation3d Then
                    objRigidSetRelation3d = objRelation
                End If
            Next

        Catch ex As Exception
            Console.WriteLine(ex.Message)
        Finally
            OleMessageFilter.Revoke()
        End Try
    End Sub
End Module