Código:
Imports System.IO Imports System.Web Imports System.Web.UI Dim popupScript As String = "<script language='JavaScript'>" & _ "window.open('" & ruta & "', 'CustomPopUp', " & _ "'width=200, height=200, menubar=yes, resizable=no')" & _ "</script>" Me.RegisterStartupScript("PopupScript", popupScript)