diff --git a/new/uipriv.h b/new/uipriv.h
index 6f603fa7..3cec770c 100644
--- a/new/uipriv.h
+++ b/new/uipriv.h
@@ -13,6 +13,7 @@ extern void complain(const char *, ...);
 extern uiContainer *newBin(void);
 extern void binSetMainControl(uiContainer *, uiControl *);
 extern void binSetMargins(uiContainer *, intmax_t, intmax_t, intmax_t, intmax_t);
+extern void binSetParent(uiContainer *, uintptr_t);
 
 // lifetimes.c
 extern void properlyDestroyControl(uiControl *);
diff --git a/new/windows/OLDwindow.c b/new/windows/OLDwindow.c
index b839bb6e..bac769d1 100644
--- a/new/windows/OLDwindow.c
+++ b/new/windows/OLDwindow.c
@@ -1,19 +1,6 @@
 // 6 april 2015
 #include "uipriv_windows.h"
 
-struct window {
-	uiWindow w;
-	HWND hwnd;
-	uiOSContainer *content;
-	BOOL shownOnce;
-	int (*onClosing)(uiWindow *, void *);
-	void *onClosingData;
-	int margined;
-	BOOL canDestroy;
-};
-
-#define uiWindowClass L"uiWindowClass"
-
 static LRESULT CALLBACK uiWindowWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
 	struct window *w;
@@ -75,67 +62,3 @@ ATOM registerWindowClass(HICON hDefaultIcon, HCURSOR hDefaultCursor)
 	wc.hbrBackground = (HBRUSH) (COLOR_BTNFACE + 1);
 	return RegisterClassW(&wc);
 }
-
-#define exstyle 0
-#define style WS_OVERLAPPEDWINDOW
-
-static int defaultOnClosing(uiWindow *w, void *data)
-{
-	return 1;
-}
-
-uiWindow *uiNewWindow(const char *title, int width, int height, int hasMenubar)
-{
-	struct window *w;
-	RECT adjust;
-	WCHAR *wtitle;
-	BOOL hasMenubarBOOL;
-	HMENU hmenu;
-
-	w = uiNew(struct window);
-	w->onClosing = defaultOnClosing;
-
-	hasMenubarBOOL = FALSE;
-	if (hasMenubar)
-		hasMenubarBOOL = TRUE;
-
-	adjust.left = 0;
-	adjust.top = 0;
-	adjust.right = width;
-	adjust.bottom = height;
-	// TODO does not handle menu wrapping; see http://blogs.msdn.com/b/oldnewthing/archive/2003/09/11/54885.aspx
-	if (AdjustWindowRectEx(&adjust, style, hasMenubarBOOL, exstyle) == 0)
-		logLastError("error getting real window coordinates in uiWindow()");
-
-	wtitle = toUTF16(title);
-	w->hwnd = CreateWindowExW(exstyle,
-		uiWindowClass, wtitle,
-		style,
-		CW_USEDEFAULT, CW_USEDEFAULT,
-		adjust.right - adjust.left, adjust.bottom - adjust.top,
-		NULL, NULL, hInstance, w);
-	if (w->hwnd == NULL)
-		logLastError("error creating window in uiWindow()");
-	uiFree(wtitle);
-
-	w->content = uiNewOSContainer((uintptr_t) (w->hwnd));
-
-	if (hasMenubar) {
-		hmenu = makeMenubar();
-		if (SetMenu(w->hwnd, hmenu) == 0)
-			logLastError("error giving menu to window in uiNewWindow()");
-	}
-
-	uiWindow(w)->Destroy = windowDestroy;
-	uiWindow(w)->Handle = windowHandle;
-	uiWindow(w)->Title = windowTitle;
-	uiWindow(w)->SetTitle = windowSetTitle;
-	uiWindow(w)->Show = windowShow;
-	uiWindow(w)->Hide = windowHide;
-	uiWindow(w)->OnClosing = windowOnClosing;
-	uiWindow(w)->SetChild = windowSetChild;
-	uiWindow(w)->Margined = windowMargined;
-	uiWindow(w)->SetMargined = windowSetMargined;
-
-	return uiWindow(w);
-}
diff --git a/new/windows/bin.c b/new/windows/bin.c
index 5102aaaf..0e568153 100644
--- a/new/windows/bin.c
+++ b/new/windows/bin.c
@@ -99,3 +99,12 @@ void binSetMargins(uiContainer *c, intmax_t left, intmax_t top, intmax_t right,
 	b->marginBottom = bottom;
 	uiContainerUpdate(uiContainer(b));
 }
+
+void binSetParent(uiContainer *c, uintptr_t osParent)
+{
+	struct bin *b = (struct bin *) c;
+	HWND newParent = (HWND) osParent;
+
+	if (SetParent(b->hwnd, newParent) == 0)
+		logLastError("error changing bin's parent in binSetParent()");
+}
diff --git a/new/windows/window.c b/new/windows/window.c
index 221fdaa7..71ff67d4 100644
--- a/new/windows/window.c
+++ b/new/windows/window.c
@@ -1,6 +1,8 @@
 // 27 april 2015
 #include "uipriv_windows.h"
 
+#define windowClass L"libui_uiWindowClass"
+
 struct window {
 	uiWindow w;
 	HWND hwnd;
@@ -14,6 +16,11 @@ struct window {
 
 // TODO window class and init functions
 
+static int defaultOnClosing(uiWindow *w, void *data)
+{
+	return 1;
+}
+
 static void windowDestroy(uiControl *c)
 {
 	struct window *w = (struct window *) c;
@@ -155,3 +162,66 @@ static void windowSetMargined(uiWindow *ww, int margined)
 	else
 		binSetMargins(w->bin, 0, 0, 0, 0);
 }
+
+uiWindow *uiNewWindow(const char *title, int width, int height, int hasMenubar)
+{
+	struct window *w;
+	RECT adjust;
+	WCHAR *wtitle;
+	BOOL hasMenubarBOOL;
+	HMENU hmenu;
+
+	w = uiNew(struct window);
+
+	hasMenubarBOOL = FALSE;
+	if (hasMenubar)
+		hasMenubarBOOL = TRUE;
+
+	adjust.left = 0;
+	adjust.top = 0;
+	adjust.right = width;
+	adjust.bottom = height;
+	// TODO does not handle menu wrapping; see http://blogs.msdn.com/b/oldnewthing/archive/2003/09/11/54885.aspx
+	if (AdjustWindowRectEx(&adjust, style, hasMenubarBOOL, exstyle) == 0)
+		logLastError("error getting real window coordinates in uiNewWindow()");
+
+	wtitle = toUTF16(title);
+	w->hwnd = CreateWindowExW(0,
+		windowClass, wtitle,
+		WS_OVERLAPPEDWINDOW,
+		CW_USEDEFAULT, CW_USEDEFAULT,
+		adjust.right - adjust.left, adjust.bottom - adjust.top,
+		NULL, NULL, hInstance, w);
+	if (w->hwnd == NULL)
+		logLastError("error creating window in uiWindow()");
+	uiFree(wtitle);
+
+	w->bin = newBin();
+	binSetParent(w->bin, (uintptr_t) (w->hwnd));
+
+	if (hasMenubar) {
+		hmenu = makeMenubar();
+		if (SetMenu(w->hwnd, hmenu) == 0)
+			logLastError("error giving menu to window in uiNewWindow()");
+	}
+
+	uiControl(w)->Destroy = windowDestroy;
+	uiControl(w)->Handle = windowHandle;
+	uiControl(w)->SetParent = windowSetParent;
+	uiControl(w)->PreferredSize = windowPreferredSize;
+	uiControl(w)->Resize = windowResize;
+	uiControl(w)->Visible = windowVisible;
+	uiControl(w)->Show = windowShow;
+	uiControl(w)->Hide = windowHide;
+	uiControl(w)->Enable = windowEnable;
+	uiControl(w)->Disable = windowDisable;
+
+	uiWindow(w)->Title = windowTitle;
+	uiWindow(w)->SetTitle = windowSetTitle;
+	uiWindow(w)->OnClosing = windowOnClosing;
+	uiWindow(w)->SetChild = windowSetChild;
+	uiWindow(w)->Margined = windowMargined;
+	uiWindow(w)->SetMargined = windowSetMargined;
+
+	return uiWindow(w);
+}