Enable Disable TabPage inside TabControl in Windows Application using C# and VB.Net

I have a tabcontrol1 with two tab pages.

First, I left the first tab as default and disabled the second tab.

I have a button in the first tab, I want when I click that button, the second tab must be enabled.

I will upload the code.

Private PreviousTab As New TabPage
Private CurrentTab As New TabPage

Private Sub TabControl1_Deselected(ByVal sender As Object, ByVal e As System.Windows.Forms.TabControlEventArgs) Handles TabControl1.Deselected
    PreviousTab = e.TabPage
End Sub

Private Sub TabControl1_Selected(ByVal sender As Object, ByVal e As System.Windows.Forms.TabControlEventArgs) Handles TabControl1.Selected
    CurrentTab = e.TabPage
    If (PreviousTab.Name <> CurrentTab.Name) And (CurrentTab.Name = TabPage2.Name) Then
        TabControl1.SelectedTab = PreviousTab
    End If

Private Sub cmdlogin_Click(sender As Object, e As EventArgs) Handles cmdlogin.Click
    If SQL.HasConnection = True Then
        ' MsgBox("SUCCESS!")
        If IsAuthenticated() = True Then
            AuthUser = txtuser.Text
            GetUserInfo()
            CheckBox15.Checked = True
            Dim tabPage As TabPage
            For Each tabPage In TabControl1.TabPages
                If tabPage.Text = "TabPage2" Then
                    TabControl1.SelectedTab = TabPage2
                    tabPage.Enabled = True
                 End If
            Next
            End If
        End If
    End Sub