Started radiobutton work. This event model isn't going to work.

redo/test/page4.c

@@ -29,6 +29,7 @@ SETTOO(Slider, Low, -80)
 SETTOO(Slider, High, 80)
 
 uiCombobox *cbox;
+uiRadioButtons *rb;
 
 uiBox *makePage4(void)
 {
@@ -83,5 +84,13 @@ uiBox *makePage4(void)
 	uiComboboxAppend(cbox, "Item 3");
 	uiBoxAppend(page4, uiControl(cbox), 0);
 
+/*
+	rb = uiNewRadioButtons();
+	uiRadioButtonsAppend(rb, "Item 1");
+	uiRadioButtonsAppend(rb, "Item 2");
+	uiRadioButtonsAppend(rb, "Item 3");
+	uiBoxAppend(page4, uiControl(rb), 0);
+*/
+
 	return page4;
 }

redo/ui.idl

@@ -175,6 +175,11 @@ interface Combobox from Control {
 };
 func NewCombobox(void) *Combobox;
 
+interface RadioButtons from Control {
+	func Append(text *const char);
+};
+func NewRadioButtons(void) *RadioButtons;
+
 interface Menu {
 	func AppendItem(name *const char) *MenuItem;
 	func AppendCheckItem(name *const char) *MenuItem;

redo/windows/GNUmakeinc.mk

@@ -16,6 +16,7 @@ osCFILES = \
 	windows/menu.c \
 	windows/parent.c \
 	windows/progressbar.c \
+	windows/radiobuttons.c \
 	windows/resize.c \
 	windows/separator.c \
 	windows/slider.c \

redo/windows/radiobuttons.c

@@ -0,0 +1,7 @@
+// 20 may 2015
+#include "uipriv_windows.h"
+
+struct radiobuttons {
+	uiRadioButtons r;
+	struct ptrArray *hwnds;
+};