diff --git a/container_darwin.m b/container_darwin.m
index 51cd1e7a..8b2899c7 100644
--- a/container_darwin.m
+++ b/container_darwin.m
@@ -59,7 +59,10 @@ uiLogObjCClassAllocations
 	uiControlResize(self.child, x, y, width, height, &d);
 }
 
-// TODO margined
+- (BOOL)uiMargined
+{
+	return self->uimargined;
+}
 
 - (void)uiSetMargined:(BOOL)margined
 {
diff --git a/test.c b/test.c
index 6d43afb0..e63ed893 100644
--- a/test.c
+++ b/test.c
@@ -102,7 +102,8 @@ static void showSpaced(uiControl *c, void *data)
 {
 	char msg[] = { 'm', ' ', '0', ' ', 'p', ' ', '0', '\0' };
 
-	// TODO margined
+	if (uiWindowMargined(w))
+		msg[2] = '1';
 	if (uiStackPadded(stacks[0]))
 		msg[6] = '1';
 	uiEntrySetText(e, msg);
diff --git a/ui.h b/ui.h
index 5a4ed3f9..9bf8601a 100644
--- a/ui.h
+++ b/ui.h
@@ -53,7 +53,7 @@ void uiWindowShow(uiWindow *);
 void uiWindowHide(uiWindow *);
 void uiWindowOnClosing(uiWindow *, int (*)(uiWindow *, void *), void *);
 void uiWindowSetChild(uiWindow *, uiControl *);
-// TODO uiWindowMargined()
+int uiWindowMargined(uiWindow *);
 void uiWindowSetMargined(uiWindow *, int);
 
 uiControl *uiNewButton(const char *);
diff --git a/uipriv_darwin.h b/uipriv_darwin.h
index ced12fc9..0aa348d0 100644
--- a/uipriv_darwin.h
+++ b/uipriv_darwin.h
@@ -36,5 +36,6 @@ extern void setStandardControlFont(NSControl *);
 // TODO rename to uiChild
 @property uiControl *child;
 - (void)uiUpdateNow;
+- (BOOL)uiMargined;
 - (void)uiSetMargined:(BOOL)margined;
 @end
diff --git a/window_darwin.m b/window_darwin.m
index 0b8f1c32..2822a354 100644
--- a/window_darwin.m
+++ b/window_darwin.m
@@ -111,7 +111,12 @@ void uiWindowSetChild(uiWindow *w, uiControl *c)
 	uiControlSetParent(D.container.child, (uintptr_t) (D.container));
 }
 
-// TODO margined
+int uiWindowMargined(uiWindow *w)
+{
+	if ([D.container uiMargined])
+		return 1;
+	return 0;
+}
 
 void uiWindowSetMargined(uiWindow *w, int margined)
 {
diff --git a/window_unix.c b/window_unix.c
index 9a614af4..ba9b7ef6 100644
--- a/window_unix.c
+++ b/window_unix.c
@@ -82,7 +82,10 @@ void uiWindowSetChild(uiWindow *w, uiControl *c)
 	uiControlSetParent(uiContainer(w->container)->child, (uintptr_t) (w->container));
 }
 
-// TODO margined
+int uiWindowMargined(uiWindow *w)
+{
+	return uiContainer(w->container)->margined;
+}
 
 void uiWindowSetMargined(uiWindow *w, int margined)
 {
diff --git a/window_windows.c b/window_windows.c
index c3cd93d5..cb0bffbd 100644
--- a/window_windows.c
+++ b/window_windows.c
@@ -180,7 +180,10 @@ void uiWindowSetChild(uiWindow *w, uiControl *c)
 	uiControlSetParent(w->child, (uintptr_t) (w->hwnd));
 }
 
-// TODO uiWindowMargined
+int uiWindowMargined(uiWindow *w)
+{
+	return w->margined;
+}
 
 void uiWindowSetMargined(uiWindow *w, int margined)
 {