Imports System.Data.SqlClient
Public Class Form1
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim connetionString As String
        Dim sqlCnn As SqlConnection
        Dim sqlCmd As SqlCommand
        Dim adapter As New SqlDataAdapter
        Dim ds As New DataSet
        Dim i As Integer
        Dim sql As String

        connetionString = "Data Source=ServerName;Initial Catalog=DatabaseName;User ID=UserNamePassword=Password"
        sql = "Select  * from product"

        sqlCnn = New SqlConnection(connetionString)
        Try
            sqlCnn.Open()
            sqlCmd = New SqlCommand(sql, sqlCnn)
            adapter.SelectCommand = sqlCmd
            adapter.Fill(ds)
            For i = 0 To ds.Tables(0).Rows.Count - 1
                MsgBox(ds.Tables(0).Rows(i).Item(0) & "  --  " & ds.Tables(0).Rows(i).Item(1))
            Next
            adapter.Dispose()
            sqlCmd.Dispose()
            sqlCnn.Close()
        Catch ex As Exception
            MsgBox("Can not open connection ! ")
        End Try
    End Sub
End Class