Imports System.Runtime.InteropServices

Public Class frmAddCenterArc

    Private Sub btnAddCenterArc_Click(sender As System.Object, e As System.EventArgs) Handles btnAddCenterArc.Click
        Dim objApplication As SolidEdgeFramework.Application = Nothing
        Dim objDraftDoc As SolidEdgeDraft.DraftDocument = Nothing
        Dim objCenterLines As SolidEdgeFrameworkSupport.CenterLines = Nothing
        Dim objType As Type = Nothing
        Dim objArc1 As Object = Nothing
        Dim objArc2 As Object = Nothing

        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

            objDraftDoc = objApplication.ActiveDocument
            ' drawing an arcs on the active sheet
            objArc1 = objDraftDoc.ActiveSheet.Arcs2d.AddByCenterStartEnd(0.5, 0.3, 0.2, 0.1, 0.6, 0.2)
            objArc2 = objDraftDoc.ActiveSheet.Arcs2d.AddByCenterStartEnd(0.5, 0.3, 0.1, 0.12, 0.7, 0.25)

            ' getting the CenterLines object
            objCenterLines = objDraftDoc.ActiveSheet.CenterLines

            ' drawing a center arc on the active sheet using the two arcs
            Call objCenterLines.AddCenterArcBy2Arcs(objArc1, objArc2)


            ' getting the CenterLines object on the active sheet
            objCenterLines = objDraftDoc.ActiveSheet.CenterLines

            ' drawing a center arc by center point on the active sheet
            Call objCenterLines.AddCenterArcBy3Points(Nothing, 0.05, 0.02, 0.0#, False, Nothing, 0.1, 0.04, 0.0#, False, Nothing, 0.2, 0.03, 0.0#, False)
        Catch ex As Exception
            MsgBox(ex.ToString)
        End Try
    End Sub
End Class