Throw New NotImplementedException - VB - vb.net

Question

I'm making an application that manages the inputs and outputs of a company's customers as well as the creation of the same, however when I "submit" the form of the creation of a new customer to me the following error:
"Throw New NotImplementedException"
I leave here my code, so they can help me.
FORM1.vb
Public Class Form1
Private Property cnt As Object
<SerializableAttribute> _
'<ComVisibleAttribute(True)> _
Public Class NotImplementedException _
'Inherits SystemException
End Class
Private Sub TabPage1_Click(sender As Object, e As EventArgs)
Dim cnt As New OleDb.OleDbConnection
End Sub
Private Sub Label1_Click(sender As Object, e As EventArgs)
End Sub
Private Sub GroupBox1_Enter(sender As Object, e As EventArgs)
End Sub
Private Sub Button1_Click_1(sender As Object, e As EventArgs) Handles Button1.Click
TabControl1.SelectedTab = TabPage2
End Sub
Private Sub TabPage2_Click(sender As Object, e As EventArgs) Handles TabPage2.Click
End Sub
Private Sub PictureBox1_Click(sender As Object, e As EventArgs) Handles PictureBox1.Click
End Sub
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
'cnt.ConnectionString = "Provinder=Microsoft.Jet.Oledb.40; Data Source=" & Application.StartupPath & "\bdtesteentradas.mdb"
'TODO: This line of code loads data into the 'BdtesteentradasDataSet.empresa' table. You can move, or remove it, as needed.
Me.EmpresaTableAdapter.Fill(Me.BdtesteentradasDataSet.empresa)
End Sub
Private Sub FillByToolStripButton_Click(sender As Object, e As EventArgs) Handles FillByToolStripButton.Click
Try
Me.EmpresaTableAdapter.FillBy(Me.BdtesteentradasDataSet.empresa)
Catch ex As System.Exception
System.Windows.Forms.MessageBox.Show(ex.Message)
End Try
End Sub
Private Sub TextBox1_TextChanged(sender As Object, e As EventArgs) Handles TextBox1.TextChanged
Me.EmpresaBindingSource.Filter = "nif ='" & TextBox1.Text & "'"
End Sub
Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
TextBox2.Text = ""
TextBox3.Text = ""
TextBox6.Text = ""
TextBox7.Text = ""
TextBox8.Text = ""
TextBox5.Text = ""
TextBox4.Text = ""
End Sub
Private Sub TextBox2_TextChanged(sender As Object, e As EventArgs) Handles TextBox2.TextChanged
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
'Dim cnt As New OleDb.OleDbCommand
If Not ConnectionState.Open Then
End If
Cmd.Connection = cnt()
Cmd.CommandText = "INSERT INTO empresa (NIF, Empresa, nCliente, Distrito, NomeContacto, ApelidoContacto, Funcao" &
"VALUES(" & Me.TextBox6.Text & ")"
'Cmd.ExecuteNonQuery()
MsgBox("Dados inseridos.")
End Sub
Cmd.vb
Class Cmd
Shared Property CommandText As String
Shared Property Connection As Object
Shared Sub ExecuteNonQuery()
Throw New NotImplementedException
End Sub
End Class
Error message
Already a big thank you

Answer 1

You got error on your "cmd" variable and "fixed it" this way:
Didn't you? This generated the file Cmd.vb for you.
That is not what you want. Remove Cmd.vb from you project an try this:
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
'You want to check, what the State of *your* connection is
If Not cnt.State = ConnectionState.Open Then
End If
'Create a Command-Object from the Connection
Using cmd = cnt.CreateCommand()
cmd.CommandText = "INSERT INTO empresa (NIF, Empresa, nCliente, Distrito, NomeContacto, ApelidoContacto, Funcao" &
"VALUES(" & Me.TextBox6.Text & ")"
cmd.ExecuteNonQuery()
MsgBox("Dados inseridos.")
End Using
End Sub