public void GetNextControlFromTabControl2 () {
Form form = new Form ();
form.ShowInTaskbar = false;
TabControl tab = new TabControl ();
TabPage page1 = new TabPage ("page one");
page1.Controls.AddRange (flat_controls);
TabPage page2 = new TabPage ("page two");
tab.TabPages.Add (page1);
tab.TabPages.Add (page2);
form.Controls.Add (tab);
form.Show ();
Assert.AreEqual (form.GetNextControl (null, true), tab, "form-1");
Assert.AreEqual (form.GetNextControl (null, false), page2, "form-2");
Assert.AreEqual (form.GetNextControl (tab, true), page1, "tab-1");
Assert.AreEqual (form.GetNextControl (tab, false), null, "tab-2");
Assert.AreEqual (form.GetNextControl (page1, true), flat_controls [0], "page-one-1");
Assert.AreEqual (form.GetNextControl (page1, false), tab, "page-one-2");
Assert.AreEqual (form.GetNextControl (page2, true), null, "page-two-1");
Assert.AreEqual (form.GetNextControl (page2, false), flat_controls [2], "page-two-2");
Assert.AreEqual (form.GetNextControl (flat_controls [0], false), page1, "form-ctrls-0-backward");
Assert.AreEqual (form.GetNextControl (flat_controls [2], true), page2, "form-ctrls-2-forward");
Assert.AreEqual (tab.GetNextControl (null, true), page1, "tab-null-forward");
Assert.AreEqual (tab.GetNextControl (page1, false), null, "tab-page1-backward");
Assert.AreEqual (tab.GetNextControl (flat_controls [0], false), page1, "tab-ctrls-0-backward");
Assert.AreEqual (tab.GetNextControl (flat_controls [2], true), page2, "tab-ctrls-2-forward");
Assert.AreEqual (page1.GetNextControl (flat_controls [0], true), flat_controls [1], "page1-ctrls-0-forward");
Assert.AreEqual (page1.GetNextControl (flat_controls [0], false), null, "page1-ctrls-0-backward");
Assert.AreEqual (page1.GetNextControl (flat_controls [1], true), flat_controls [2], "page1-ctrls-1-forward");
Assert.AreEqual (page1.GetNextControl (flat_controls [1], false), flat_controls [0], "page1-ctrls-1-backward");
Assert.AreEqual (page1.GetNextControl (flat_controls [2], true), null, "page1-ctrls-2-forward");
Assert.AreEqual (page1.GetNextControl (flat_controls [2], false), flat_controls [1],"page1-ctrls-2-backward");
form.Dispose ();
}