diff --git a/structs.go b/structs.go
index 50784fa..cc1a421 100644
--- a/structs.go
+++ b/structs.go
@@ -105,12 +105,12 @@ func (s GuiBox) SetTitle(title string) {
 	return
 }
 
-func (s GuiBox) InitTab(title string) {
+func (s GuiBox) InitTab(title string) *ui.Tab {
 	if (s.Window == nil) {
-		return
+		return nil
 	}
 	if (s.Window.UiWindow == nil) {
-		return
+		return nil
 	}
 
 	window := s.Window.UiWindow
@@ -123,19 +123,21 @@ func (s GuiBox) InitTab(title string) {
 	// tab.SetMargined(1, true)
 
 	s.Window.UiTab = tab
+	return tab
 }
 
-func (s GuiBox) AddTab(title string, custom ui.Control) {
+func (s GuiBox) AddTab(title string, custom ui.Control) *ui.Tab {
 	if (s.Window == nil) {
-		return
+		return nil
 	}
 	if (s.Window.UiTab == nil) {
-		return
+		return nil
 	}
 
 	tab := s.Window.UiTab
 
 	tab.Append(title, custom)
+	return tab
 }
 
 func (s GuiBox) AddTab2(title string, custom ui.Control) *ui.Tab {
@@ -153,8 +155,8 @@ func (s GuiBox) AddTab2(title string, custom ui.Control) *ui.Tab {
 
 func (s GuiBox) AddBoxTab(title string) *GuiBox {
 	uiTab := s.AddTab2(title, InitBlankWindow())
-
 	tabSetMargined(uiTab)
+
 	var box *GuiBox
 	box = HardBox(s.Window, Xaxis, "jcarrAddBoxTab")
 	box.Window.UiTab = uiTab
@@ -162,7 +164,13 @@ func (s GuiBox) AddBoxTab(title string) *GuiBox {
 }
 
 func (s GuiBox) AddDemoTab(title string) {
-	s.AddTab(title, makeWindowTemplate())
+	uiTab := s.AddTab(title, makeWindowTemplate())
+	tabSetMargined(uiTab)
+}
+
+func (s GuiBox) AddDebugTab(title string) {
+	uiTab := s.AddTab(title, makeWindowDebug())
+	tabSetMargined(uiTab)
 }
 
 func tabSetMargined(tab *ui.Tab) {
diff --git a/window-debug.go b/window-debug.go
new file mode 100644
index 0000000..874b83e
--- /dev/null
+++ b/window-debug.go
@@ -0,0 +1,83 @@
+package gui
+
+import "log"
+import "github.com/andlabs/ui"
+import _ "github.com/andlabs/ui/winmanifest"
+
+var names = make([]string, 100)
+
+func makeWindowDebug() ui.Control {
+
+	hbox := ui.NewHorizontalBox()
+	hbox.SetPadded(true)
+
+	group := ui.NewGroup("Numbers")
+	group.SetMargined(true)
+	hbox.Append(group, true)
+
+	vbox := ui.NewVerticalBox()
+	vbox.SetPadded(true)
+	group.SetChild(vbox)
+
+	spinbox := ui.NewSpinbox(22, 44)
+	slider  := ui.NewSlider(22, 44)
+	pbar    := ui.NewProgressBar()
+
+	spinbox.OnChanged(func(*ui.Spinbox) {
+		slider.SetValue(spinbox.Value())
+		pbar.SetValue(spinbox.Value())
+	})
+	slider.OnChanged(func(*ui.Slider) {
+		spinbox.SetValue(slider.Value())
+		pbar.SetValue(slider.Value())
+	})
+	vbox.Append(spinbox, false)
+	vbox.Append(slider, false)
+	vbox.Append(pbar, false)
+
+	ip := ui.NewProgressBar()
+	ip.SetValue(-1)
+	vbox.Append(ip, false)
+
+	group = ui.NewGroup("WindowMap")
+	group.SetMargined(true)
+	hbox.Append(group, true)
+
+	vbox = ui.NewVerticalBox()
+	vbox.SetPadded(true)
+	group.SetChild(vbox)
+
+	cbox := ui.NewCombobox()
+	addName(cbox, "Window 1")
+	addName(cbox, "Window 2")
+	addName(cbox, "Combobox Item 3")
+	vbox.Append(cbox, false)
+
+	cbox.OnSelected(func(*ui.Combobox) {
+		log.Println("test")
+		test := cbox.Selected()
+		log.Println("test=", test)
+		log.Println("names[test] =", names[test])
+
+//		for name := range names {
+//			log.Println("gui.DumpBoxes() name: ", name)
+//		}
+//		if (names[test] != nil) {
+//		}
+	})
+
+	for name, _ := range Data.WindowMap {
+		log.Println("gui.DumpBoxes() name: ", name)
+		addName(cbox, name)
+	}
+
+	return hbox
+}
+
+var x int = 0
+
+func addName(c *ui.Combobox, s string) {
+	c.Append(s)
+	names[x] = s
+	x = x + 1
+}