Question Using printui.dll to set default printer

[phqu88]

I have some code that successfully adds a selected printer but when i use the switches for printui.dll to set the printer as default, it doesn't work. The code still adds the printer, just doesn't set it as the default one.
I found the switches from here...
Command Line Printer Control


My code is...

        Try

            Dim printername As String = CStr(Form1.ListBox_PrinterResults.SelectedItem)
            Dim Server As String = "\\printserver"
            Dim networkpath As String = """" & Server & "\" & printername & """"
            Dim useExistingDriver As Boolean = 0

            Dim setdefaultprinter As Boolean = 0
            Dim cmdToSend As String = "rundll32 printui.dll,PrintUIEntry /y /in /q /n" & networkpath

            If useExistingDriver Then cmdToSend += " /u"
            If setdefaultprinter Then cmdToSend += " /y" '
            Shell(cmdToSend, AppWinStyle.Hide) ' execute the command
            MsgBox(cmdToSend)
        Catch ex As Exception
            MsgBox(ex.ToString)
        End Try