this code works fine to display images, but when I change the strFileName to a .PDF document it doesn't work...is there something else I need to do to view a .PDF?

Code:
Const strFileName As String = "C:\Inetpub\wwwroot\pbss\interstate.gif"
        Dim objStream As Stream = File.Open(strFileName, FileMode.Open)
        Dim buffer(objStream.Length) As Byte
        objStream.Read(buffer, 0, objStream.Length)
        objStream.Close()
        Response.BinaryWrite(buffer)