Hi
How can i use RegisterStartupScript in my class file?

Imports System
Imports System.Web.UI.Page
Imports System.Configuration
Imports System.Data
Imports System.Data.SqlClient
Imports System.Web
Imports System.Text
Imports System.Web.UI


Namespace LGFG_email


Public Class LGFGNews

        Public Sub OpenPopUp()

            Dim sb As StringBuilder
            sb = New StringBuilder
            sb.Append("<script>")

            sb.Append("window.open ('/default.aspx','mywindow','location=0,status=0,scro llbars=0,width=450,height=250')")
            'sb.Append("window.open ('http://www.bounty.com','mywindow','location=0,status=0,sc rollbars=0,width=450,height=250')")

            sb.Append("</script>")

            RegisterStartupScript("b", sb.ToString())

        End Sub

End Class

End Namespace

Is what you have posted not working?
Have you looked at any of the documentation for this method?

-Peter