Imports System.Runtime.InteropServices
Public Class GetFacesByAreaOfBody

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Dim objApplication As SolidEdgeFramework.Application = Nothing
        Dim objDoc As SolidEdgePart.PartDocument = Nothing
        Dim objModels As SolidEdgePart.Models = Nothing
        Dim objModel As SolidEdgePart.Model = Nothing
        Dim objType As Type = Nothing
        Dim dAreaLessThan As Double
        Dim NumFaces As Integer
        Dim ByAreaFaces(1) As Object
        Dim SurfaceAreaOfFaces(1) As Double
        dAreaLessThan = 0.2

        Try
            ' Create/get the application with specific settings
            objApplication = Marshal.GetActiveObject("SolidEdge.Application")

            If objApplication Is Nothing Then
                ' Get the type from the Solid Edge ProgID
                objType = Type.GetTypeFromProgID("SolidEdge.Application")
                ' Start Solid Edge
                objApplication = Activator.CreateInstance(objType)
                ' Make Solid Edge visible
                objApplication.Visible = True
            End If

            ' Get document
            objDoc = objApplication.ActiveDocument

            ' get the models collection
            objModels = objDoc.Models()
            objModel = objModels.Item(1)

            Call objModel.GetFacesByAreaOfBody(dAreaLessThan, NumFaces, ByAreaFaces, SurfaceAreaOfFaces)

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