Response.Write in a Shared function - vb.net

Question

Is it possible to open a new window from a shared function? There is a compile time error on the line that starts: Response.Write:
<System.Web.Services.WebMethod()> _
Public Shared Function UpdateTimeBasedDisposal(ByVal usn As String, ByVal strCon As String, ByVal decision As String, ByVal review As String) As String
Dim boolDecision As Boolean = CType(decision, Boolean)
Dim objNominal As New clsPrimaryNominal(strCon)
Dim strUpdateTimeBasedDisposal As String = ""
Dim objReview As New clsReviews(ConfigurationManager.ConnectionStrings("GeniedbConnection").ConnectionString), tyReview As New typeReview, intTotal As Integer, intDisposalTotal As Integer, intType As Integer
If boolDecision Then
If objNominal.MakeTimeBased(CInt(usn)) < 1 Then
strUpdateTimeBasedDisposal = "THERE WAS A PROBLEM MAKING THE NOMINAL RECORD FOR " & usn & " TIME BASED DISPOSAL." & vbCrLf
Else
strUpdateTimeBasedDisposal = "The Primary Nominal was successfully put into time based disposal"
End If
Else
If objNominal.MakeNotTimeBased(CInt(usn)) < 1 Then
strUpdateTimeBasedDisposal = "THERE WAS A PROBLEM MAKING THE NOMINAL RECORD FOR " & usn & " NOT TIME BASED DISPOSAL." & vbCrLf
Else
strUpdateTimeBasedDisposal = "The Primary Nominal was successfully taken out of time based disposal"
' next thing to do is create all the disposal records
'CreateDisposals()
intType = objReview.ReviewType(CLng(review), intTotal, intDisposalTotal)
Response.Write("<script>window.open('frmNRAC.aspx?USN=" & CStr(Session("PNUSN")) & "&Review=" & CStr(Session("Review")) & "&Total=" & intTotal & "&Disposals=" & intDisposalTotal & "','_blank')</script>")
End If
End If
Return strUpdateTimeBasedDisposal
End Function

Answer 1

This is server-side code. Server-side code can never directly open a new window. All it can do is create an http response that causes some javascript to open a new window. WebMethods also can't call the javascript on their own directly. You need code at the call site for the webmethod to invoke your javascript based on the result of the method.
Additionally: beware Shared methods in ASP.Net in the first place. They share data at the application domain level, and in ASP.Net, all the users of your site are in the same application domain.