How to add and edit data in the textbox with binding

[RoxyBeginner]

I created a form with a switchboard where the user click on one of the buttons. When the form load i want the user to be able to add and edit data by clicking the appropriate button. When I click add, I'm unable to add data. Same with edit. I'm not sure if I'm using the binding correctly.

Public Class CustomerForm
    Private theBinding As BindingSource
    Private objCustomer As CustomerTier
 
    Private Sub CustomerForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim dsCustomer As CustDataSet
        objCustomer = New CustomerTier
 
        dsCustomer = objCustomer.getDataSet()
 
        Try
            theBinding = New BindingSource()
            theBinding.DataSource = dsCustomer
            theBinding.DataMember = "Customer"
 
        Catch ex As Exception
            MessageBox.Show("Error With the Binding", ex.Message)
        End Try
 
        txtFirstName.DataBindings.Add("Text", theBinding, "First Name")
        txtLastName.DataBindings.Add("Text", theBinding, "Last Name")
        txtAddress.DataBindings.Add("Text", theBinding, "Address")
        txtCity.DataBindings.Add("Text", theBinding, "City")
        txtState.DataBindings.Add("Text", theBinding, "State")
        txtZip.DataBindings.Add("Text", theBinding, "Zip Code")
        lblID.DataBindings.Add("Text", theBinding, "Account Number")
 
        EnableNav()
    End Sub
 
    Private Sub EnableEdit()
        txtFirstName.ReadOnly() = True
        txtLastName.ReadOnly() = True
        txtAddress.ReadOnly() = True
        txtCity.ReadOnly() = True
        txtState.ReadOnly() = True
        txtZip.ReadOnly() = True
 
        btnCancel.Enabled = True
        btnFirst.Enabled = False
        btnPrev.Enabled = False
        btnNext.Enabled = False
        btnLast.Enabled = False
    End Sub
 
    Private Sub EnableNav()
        txtFirstName.ReadOnly() = True
        txtLastName.ReadOnly() = True
        txtAddress.ReadOnly() = True
        txtCity.ReadOnly() = True
        txtState.ReadOnly() = True
        txtZip.ReadOnly() = True
 
        btnCancel.Enabled = False
        btnFirst.Enabled = True
        btnPrev.Enabled = True
        btnNext.Enabled = True
        btnLast.Enabled = True
    End Sub
 
    Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
        If btnAdd.Text = "Add" Then
            btnAdd.Text = "Save"
            EnableEdit()
            btnEdit.Enabled = False
            'btnDelete.Enabled = False
 
            theBinding.AddNew()
 
        Else
            btnAdd.Text = "Add"
            EnableNav()
            btnEdit.Enabled = True
            'btnDelete.Enabled = True
            theBinding.EndEdit()
            objCustomer.setDataSet()
        End If
    End Sub
 
    Private Sub btnEdit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEdit.Click
        If btnEdit.Text = "Edit" Then
            btnEdit.Text = "Save"
            EnableEdit()
            btnAdd.Enabled = False
            'btnDelete.Enabled = False
 
        Else
            btnEdit.Text = "Edit"
            EnableNav()
            btnAdd.Enabled = True
            'btnDelete.Enabled = True
            theBinding.EndEdit()
            objCustomer.setDataSet()
        End If
    End Sub