Update base dados acess

Dim ConnectionString As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" & Application.StartupPath & "pedro..accdb")
Dim query As String = "UPDATE Clientes SET [Nome] = @Nome, [Empresa] = @Empresa WHERE ID = @IDCliente"

Dim command As New OleDbCommand(query, ConnectionString)

command.Parameters.Add("@Nome", OleDbType.VarChar).Value = NomeTextbox.Text
command.Parameters.Add("@Empresa", OleDbType.VarChar).Value = EmpresaTextbox.Text
' Actualiza apenas os dados do cliente que consta na Textbox
command.Parameters.Add("@IDCliente", OleDbType.Integer).Value = IDClienteTextbox.Text

ConnectionString.Open()

Dim x As Integer = command.ExecuteNonQuery()

If x < 1 Then
     MessageBox.Show("Erro ao actualizar", My.Application.Info.Title, MessageBoxButtons.OK, MessageBoxIcon.Error)
Else
     MessageBox.Show("Actualizado com sucesso!", My.Application.Info.Title, MessageBoxButtons.OK, MessageBoxIcon.Information)
End If

ConnectionString.Close()
command = Nothing