diff --git a/container_windows.c b/container_windows.c
index 2056653f..20d7d8d9 100644
--- a/container_windows.c
+++ b/container_windows.c
@@ -82,3 +82,19 @@ void resize(uiControl *control, HWND parent, RECT r)
 		logLastError("error releasing DC in resize()");
 	(*(control->resize))(control, r.left, r.top, r.right - r.left, r.bottom - r.top, &d);
 }
+
+void updateParent(uintptr_t h)
+{
+	HWND hwnd;
+	RECT r;
+
+	if (h == 0)		// no parent
+		return;
+	hwnd = (HWND) h;
+	// TODO is there a better way?
+	if (GetWindowRect(hwnd, &r) == 0)
+		logLastError("error getting window rect for dummy move in updateParent()");
+	if (MoveWindow(hwnd, r.left, r.top, r.right - r.left, r.bottom - r.top, TRUE) == 0)
+		logLastError("error moving window in updateParent()");
+	// TODO invalidate rect?
+}
diff --git a/newcontrol_windows.c b/newcontrol_windows.c
index 98956faf..1293f5aa 100644
--- a/newcontrol_windows.c
+++ b/newcontrol_windows.c
@@ -12,6 +12,7 @@ struct uiSingleHWNDControl {
 	void *onCommandNotifyDestroyData;
 	void (*preferredSize)(uiControl *, int, int, LONG, intmax_t *, intmax_t *);
 	void *data;
+	uintptr_t parent;
 };
 
 #define S(c) ((uiSingleHWNDControl *) (c))
@@ -28,10 +29,17 @@ static uintptr_t singleHandle(uiControl *c)
 	return (uintptr_t) (S(c)->hwnd);
 }
 
-static void singleSetParent(uiControl *c, uintptr_t parentHWND)
+static void singleSetParent(uiControl *c, uintptr_t parent)
 {
-	if (SetParent(S(c)->hwnd, (HWND) parentHWND) == NULL)
+	uiSingleHWNDControl *s = S(c);
+	uintptr_t oldparent;
+
+	oldparent = s->parent;
+	s->parent = parent;
+	if (SetParent(s->hwnd, (HWND) (s->parent)) == NULL)
 		logLastError("error changing control parent in singleSetParent()");
+	updateParent(oldparent);
+	updateParent(s->parent);
 }
 
 static uiSize singlePreferredSize(uiControl *c, uiSizing *d)
diff --git a/stack.c b/stack.c
index 45fcf545..fa28e593 100644
--- a/stack.c
+++ b/stack.c
@@ -38,11 +38,16 @@ static uintptr_t stackHandle(uiControl *c)
 
 static void stackSetParent(uiControl *c, uintptr_t parent)
 {
+	stack *s = S(c);
 	uintmax_t i;
+	uintptr_t oldparent;
 
-	S(c)->parent = parent;
+	oldparent = s->parent;
+	s->parent = parent;
 	for (i = 0; i < S(c)->len; i++)
-		(*(S(c)->controls[i]->setParent))(S(c)->controls[i], S(c)->parent);
+		(*(s->controls[i]->setParent))(s->controls[i], s->parent);
+	updateParent(oldparent);
+	updateParent(s->parent);
 }
 
 static uiSize stackPreferredSize(uiControl *c, uiSizing *d)
@@ -213,5 +218,5 @@ void uiStackAdd(uiControl *st, uiControl *c, int stretchy)
 	if (s->parent != 0)
 		(*(s->controls[s->len]->setParent))(s->controls[s->len], s->parent);
 	s->len++;
-	// TODO queue reposition
+	updateParent(s->parent);
 }
diff --git a/uipriv.h b/uipriv.h
index b8f5835b..a12fbdc9 100644
--- a/uipriv.h
+++ b/uipriv.h
@@ -25,3 +25,5 @@ extern void *uiAlloc(size_t, const char *);
 #define uiNew(T) ((T *) uiAlloc(sizeof (T), #T ))
 extern void *uiRealloc(void *, size_t, const char *);
 extern void uiFree(void *);
+
+extern void updateParent(uintptr_t);
diff --git a/window_windows.c b/window_windows.c
index d68843ba..7bbb8950 100644
--- a/window_windows.c
+++ b/window_windows.c
@@ -1,9 +1,6 @@
 // 6 april 2015
 #include "uipriv_windows.h"
 
-// TODOs:
-// - child not set to fit initial size
-
 struct uiWindow {
 	HWND hwnd;
 	uiControl *child;