Variable Scoope on Visual Basic .NET

In proramming You will with scoope of variable. Scoope of variable can be local, private or  public. Here it is example of scoope variable use in modul and form

modul code:

Module Module1   Public sNama As String End Module form Code: Public Class Form1 Private sKota As String Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click   sNama = "Visual basic Net"   TextBox1.Text = sNama End Sub Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click   sKota = "Medan"   TextBox1.Text = sKota End Sub Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click   Dim sNegara As String = "Indonesia"   TextBox1.Text = sNegara End Sub Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click   TextBox1.Text = snegara End Sub End Class Di bawah ini adalah gambar demo programnya: sNegara is stated as error  Name “snegara” is not declared. this is caused by  sNegara variable as mentioned with Dim sNegara As String = "Indonesia" at Button3_click only have local scoope. cannot read from other sub prosedur (Button4_click).