Imports System.Runtime.InteropServices

Public Class Form1

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Dim objApp As SolidEdgeFramework.Application = Nothing
        Dim objType As Type = Nothing
        Dim objMatTable As SolidEdgeFramework.MatTable = Nothing
        Dim strLibrary As String = "Materials"
        Dim objDocument As SolidEdgePart.PartDocument = Nothing
        Dim strMaterial As String = ""
        Dim varGetPropVal As Object = Nothing
        Dim listOfMaterials As Object = Nothing
        Dim listOfLibraries As Object = Nothing
        Dim numMaterials As Long
        Dim strMessage As String

        Try
            ' Get SE handle
            objApp = Marshal.GetActiveObject("SolidEdge.Application")

            If objApp Is Nothing Then
                ' Get the type from the Solid Edge ProgID
                objType = Type.GetTypeFromProgID("SolidEdge.Application")
                ' Start Solid Edge
                objApp = Activator.CreateInstance(objType)
                ' Make Solid Edge visible
                objApp.Visible = True
            End If
            ' Get material table object handle
            objMatTable = objApp.GetMaterialTable()

            ' Get material list
            objMatTable.GetMRUMaterialList(listOfMaterials, listOfLibraries, numMaterials)

            strMaterial = listOfMaterials(1)
            strLibrary = listOfLibraries(1)

            strMessage = String.Format("Number oF MRU materials = {0}", numMaterials)
            MsgBox(strMessage)

            strMessage = String.Format("2nd MRU Material is = {0} and its library is = {1}", strMaterial, strLibrary)
            MsgBox(strMessage)

        Catch ex As Exception
            MsgBox(ex.ToString)
        End Try

    End Sub

End Class