Sub btnExport_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnExport.Click
            '## Definitions ##
        Dim strOF As String
    Protected WithEvents txtExportPath As System.Web.UI.WebControls.TextBox


        '## Code ##
        strOF = txtExportPath.Text
        'strOF = "d:\test\of.txt"
        objSW = New StreamWriter(strOF, False)

..................................
            End Sub