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Can't pass text from ComboBox to TextBox

Last Modified: 2012-05-12
Hi, for some reason and i am not sure why I am getting error (  Object reference not set to an instance of an object. ).

I am using this code to fill ComboBox with all printers installed on the system:
 Dim pkInstalledPrinters As String

        ' Find all printers installed
        For Each pkInstalledPrinters In _
        Next pkInstalledPrinters

        ' Set the combo to the first printer in the list
        cmbPrinter.SelectedIndex = 0
        PrinterSelection = 3

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Then i have some Case Select

Select Case PrinterSelection
            Case 0
                txtPOSMain.Text = cmbPrinter.Text
            Case 1
                txtPOSSecond.Text = cmbPrinter.Text
            Case 2

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I am getting error  in any of the  txtPOSMain.Text = cmbPrinter.Text,  txtPOSSecond.Text = cmbPrinter.Text...

If i put MsgBox(cmbPrinter.text) I am getting result (Generic/Text Only) as that is selected printer.
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