diff --git a/test/page4.c b/test/page4.c
index a68153c0..f03ad28e 100644
--- a/test/page4.c
+++ b/test/page4.c
@@ -39,6 +39,13 @@ static void appendCBRB(uiButton *b, void *data)
 	uiRadioButtonsAppend(rb, "New Item");
 }
 
+static void onCBChanged(uiCombobox *c, void *data)
+{
+	printf("%s combobox changed to %d\n",
+		(char *) data,
+		(int) uiComboboxSelected(c));
+}
+
 uiBox *makePage4(void)
 {
 	uiBox *page4;
@@ -90,12 +97,14 @@ uiBox *makePage4(void)
 	uiComboboxAppend(cbox, "Item 1");
 	uiComboboxAppend(cbox, "Item 2");
 	uiComboboxAppend(cbox, "Item 3");
+	uiComboboxOnChanged(cbox, onCBChanged, "noneditable");
 	uiBoxAppend(page4, uiControl(cbox), 0);
 
 	editable = uiNewEditableCombobox();
 	uiComboboxAppend(editable, "Editable Item 1");
 	uiComboboxAppend(editable, "Editable Item 2");
 	uiComboboxAppend(editable, "Editable Item 3");
+	uiComboboxOnChanged(cbox, onCBChanged, "editable");
 	uiBoxAppend(page4, uiControl(editable), 0);
 
 	rb = uiNewRadioButtons();
diff --git a/ui.h b/ui.h
index cb7453a0..0d3fd24d 100644
--- a/ui.h
+++ b/ui.h
@@ -202,6 +202,9 @@ typedef struct uiCombobox uiCombobox;
 _UI_EXTERN uintmax_t uiComboboxType(void);
 #define uiCombobox(this) ((uiCombobox *) uiIsA((this), uiComboboxType(), 1))
 _UI_EXTERN void uiComboboxAppend(uiCombobox *c, const char *text);
+_UI_EXTERN intmax_t uiComboboxSelected(uiCombobox *c);
+// TODO SetSelected
+_UI_EXTERN void uiComboboxOnSelected(uiCombobox *c, void (*f)(uiCombobox *c, void *data), void *data);
 _UI_EXTERN uiCombobox *uiNewCombobox(void);
 _UI_EXTERN uiCombobox *uiNewEditableCombobox(void);