WebService application that return dataset

'using module on VB .Net

Imports System.Data.SqlClient

Imports WindowsApplication3.MyWebService

Imports System.Data

Module Module1

    Public xConn As New SqlConnection

    Public xAdpt, xadpt1 As New SqlDataAdapter

    Public xSet, xset1 As DataSet

    Public xView As DataView

    Public WebService As New MyWebService.Service

    Public xCmd As New SqlCommand

    Public xStr As String

    Public xRead As SqlDataReader

    Public xRow As DataRow

End Module

' using main form

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        Refresh()

        xSet = WebService.GetData("Select * from penjualan", "penjualan")

         ‘atau gridPenjualan.DataSource = WebService.GetData(TextBox1.Text, TextBox2.Text)
        xView = New DataView(xSet.Tables("penjualan"))
        gridPenjualan.DataSource = xView

        For i As Integer = 0 To xSet.Tables("penjualan").Columns.Count - 1
            cbSort.Items.Add(xSet.Tables("penjualan").Columns(i).ColumnName)
        Next
        Label6.Text = "Double-click untuk Update atau delete data"
        Me.CenterToScreen()
    End Sub