diff --git a/redo/windows/tab.c b/redo/windows/tab.c
index b47e2d2a..8a2a08ed 100644
--- a/redo/windows/tab.c
+++ b/redo/windows/tab.c
@@ -4,8 +4,40 @@
 struct tab {
 	uiTab t;
 	HWND hwnd;
+	struct ptrArray *pages;
+	void (*baseResize)(uiControl *, intmax_t, intmax_t, intmax_t, intmax_t, uiSizing *);
 };
 
+struct tabPage {
+	uiControl *control;
+	int margined;
+};
+
+// utility functions
+
+static LRESULT curpage(struct tab *t)
+{
+	return SendMessageW(t->hwnd, TCM_GETCURSEL, 0, 0);
+}
+
+static void showHidePage(struct tab *t, LRESULT which, int hide)
+{
+	struct tabPage *page;
+
+	if (which == (LRESULT) (-1))
+		return;
+	page = ptrArrayIndex(t->pages, struct tabPage *, which);
+	if (hide)
+		uiControlContainerHide(page->control);
+	else {
+		uiControlContainerShow(page->control);
+		// we only resize the current page, so we have to do this here
+		uiControlQueueResize(page->control);
+	}
+}
+
+// control implementation
+
 static BOOL onWM_COMMAND(uiControl *c, WORD code, LRESULT *lResult)
 {
 	return FALSE;
@@ -26,30 +58,90 @@ static void tabPreferredSize(uiControl *c, uiSizing *d, intmax_t *width, intmax_
 	// TODO
 }
 
+static void tabResize(uiControl *c, intmax_t x, intmax_t y, intmax_t width, intmax_t height, uiSizing *d)
+{
+	struct tab *t = (struct tab *) c;
+	LRESULT n;
+	struct tabPage *page;
+	RECT r;
+
+	(*(t->baseResize))(uiControl(t), x, y, width, height, d);
+	n = curpage(t);
+	if (n == (LRESULT) (-1))
+		return;
+	page = ptrArrayIndex(t->pages, struct tabPage *, n);
+	r.left = x;
+	r.top = y;
+	r.right = x + width;
+	r.bottom = y + height;
+	// TODO convert from parent window coordinates to screen coordinates
+	SendMessageW(t->hwnd, TCM_ADJUSTRECT, (WPARAM) FALSE, (LPARAM) (&r));
+	// TODO convert back to parent window coordinates
+	if (page->margined) {
+		// TODO
+	}
+	uiControlResize(page->control, x, y, width, height, d);
+}
+
 static void tabAppend(uiTab *tt, const char *name, uiControl *child)
 {
+	struct tab *t = (struct tab *) tt;
+
+	uiTabInsertAt(tt, name, t->pages->len, child);
 }
 
 static void tabInsertAt(uiTab *tt, const char *name, uintmax_t n, uiControl *child)
 {
+	struct tab *t = (struct tab *) tt;
+	struct tabPage *page;
+	LRESULT hide, show;
+	TCITEMW item;
+	WCHAR *wname;
+
+	// see below
+	hide = curpage(t);
+
+	page = uiNew(struct tabPage);
+	page->control = child;
+	uiControlSetParent(page->control, uiControl(t));
+	ptrArrayInsertAt(t->pages, n, page);
+
+	ZeroMemory(&item, sizeof (TCITEMW));
+	item.mask = TCIF_TEXT;
+	wname = toUTF16(name);
+	item.pszText = wname;
+	if (SendMessageW(t->hwnd, TCM_INSERTITEM, (WPARAM) n, (LPARAM) (&item)) == (LRESULT) -1)
+		logLastError("error adding tab to uiTab in uiTabInsertAt()");
+	uiFree(wname);
+
+	// we need to do this because adding the first tab doesn't send a TCN_SELCHANGE; it just shows the page
+	show = curpage(t);
+	if (show != hide) {
+		showHidePage(t, hide, 1);
+		showHidePage(t, show, 0);
+	}
 }
 
 static void tabDelete(uiTab *tt, uintmax_t n)
 {
+	// TODO
 }
 
 static uintmax_t tabNumPages(uiTab *tt)
 {
+	// TODO
 	return 0;
 }
 
 static int tabMargined(uiTab *tt, uintmax_t n)
 {
+	// TODO
 	return 0;
 }
 
 static void tabSetMargined(uiTab *tt, uintmax_t n, int margined)
 {
+	// TODO
 }
 
 uiTab *uiNewTab(void)
@@ -75,7 +167,11 @@ uiTab *uiNewTab(void)
 
 	t->hwnd = (HWND) uiControlHandle(uiControl(t));
 
+	t->pages = newPtrArray();
+
 	uiControl(t)->PreferredSize = tabPreferredSize;
+	t->baseResize = uiControl(t)->Resize;
+	uiControl(t)->Resize = tabResize;
 
 	uiTab(t)->Append = tabAppend;
 	uiTab(t)->InsertAt = tabInsertAt;