ASP.NET & PowerPoint - Convert PPT To WMF Format

Imports Microsoft.Office.Interop.PowerPoint
Public Class AspNetPowerPointConvertToWMF
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        Dim ppApp As New Microsoft.Office.Interop.PowerPoint.Application
        Dim ppName As String = "MySlides.ppt"
        Dim FileName As String = "MyPP"

        ppApp.Visible = True

        ppApp.Presentations.Open(Server.MapPath(ppName))
        ppApp.ActivePresentation.SaveAs(Server.MapPath(FileName), 15)
        ppApp.Quit()
        ppApp = Nothing

        Me.lblText.Text = "PowerPoint Created to Folder <b> " & FileName & "</b>"

       
    End Sub
End Class