diff --git a/redo/containerctrls_windows.go b/redo/containerctrls_windows.go
index e81c340..1aa2c57 100644
--- a/redo/containerctrls_windows.go
+++ b/redo/containerctrls_windows.go
@@ -19,7 +19,7 @@ TODO
 
 type tab struct {
 	*controlbase
-	tabs				[]*container
+	tabs				[]*sizer
 	supersetParent		func(p *controlParent)
 	superallocate		func(x int, y int, width int, height int, d *sizing) []*allocation
 }
@@ -48,15 +48,15 @@ func (t *tab) tabsetParent(p *controlParent) {
 }
 
 func (t *tab) Append(name string, control Control) {
-	c := new(container)
-	t.tabs = append(t.tabs, c)
-	c.child = control
+	s := new(sizer)
+	t.tabs = append(t.tabs, s)
+	s.child = control
 	if t.parent != nil {
-		c.child.setParent(&controlParent{t.parent})
+		s.child.setParent(&controlParent{t.parent})
 	}
 	// initially hide tab 1..n controls; if we don't, they'll appear over other tabs, resulting in weird behavior
 	if len(t.tabs) != 1 {
-		c.child.containerHide()
+		s.child.containerHide()
 	}
 	C.tabAppend(t.hwnd, toUTF16(name))
 }
@@ -74,6 +74,7 @@ func tabChanged(data unsafe.Pointer, new C.LRESULT) {
 }
 
 // a tab control contains other controls; size appropriately
+// TODO change this to commitResize()
 func (t *tab) taballocate(x int, y int, width int, height int, d *sizing) []*allocation {
 	var r C.RECT
 
@@ -85,9 +86,9 @@ func (t *tab) taballocate(x int, y int, width int, height int, d *sizing) []*all
 	C.tabGetContentRect(t.hwnd, &r)
 	// and allocate
 	// don't allocate to just the current tab; allocate to all tabs!
-	for _, c := range t.tabs {
+	for _, s := range t.tabs {
 		// because each widget is actually a child of the Window, the origin is the one we calculated above
-		c.resize(int(r.left), int(r.top), int(r.right - r.left), int(r.bottom - r.top))
+		s.resize(int(r.left), int(r.top), int(r.right - r.left), int(r.bottom - r.top))
 	}
 	// and now allocate the tab control itself
 	return t.superallocate(x, y, width, height, d)
diff --git a/redo/sizing_windows.go b/redo/sizer_windows.go
similarity index 92%
rename from redo/sizing_windows.go
rename to redo/sizer_windows.go
index 08bb0ab..554b285 100644
--- a/redo/sizing_windows.go
+++ b/redo/sizer_windows.go
@@ -41,7 +41,7 @@ const (
 	paddingDialogUnits = 4
 )
 
-func (c *container) beginResize() (d *sizing) {
+func (s *sizer) beginResize() (d *sizing) {
 	d = new(sizing)
 
 	d.baseX = C.baseX
@@ -57,7 +57,7 @@ func (c *container) beginResize() (d *sizing) {
 	return d
 }
 
-func (c *container) translateAllocationCoords(allocations []*allocation, winwidth, winheight int) {
+func (s *sizer) translateAllocationCoords(allocations []*allocation, winwidth, winheight int) {
 	// no translation needed on windows
 }
 
diff --git a/redo/sizing_windows.c b/redo/sizing_windows.c
index e6f27a6..60d57f3 100644
--- a/redo/sizing_windows.c
+++ b/redo/sizing_windows.c
@@ -3,6 +3,8 @@
 #include "winapi_windows.h"
 #include "_cgo_export.h"
 
+/* TODO rename to sizer_windows.c and move all but the first function to control_windows.c */
+
 BOOL baseUnitsCalculated = FALSE;
 int baseX;
 int baseY;
diff --git a/redo/window_windows.go b/redo/window_windows.go
index 8c64858..341f226 100644
--- a/redo/window_windows.go
+++ b/redo/window_windows.go
@@ -17,7 +17,7 @@ type window struct {
 
 	closing		*event
 
-	*container
+	*sizer
 }
 
 const windowclassname = ""
@@ -37,7 +37,7 @@ func newWindow(title string, width int, height int, control Control) *window {
 	w := &window{
 		// hwnd set in WM_CREATE handler
 		closing:		newEvent(),
-		container:		new(container),
+		sizer:		new(sizer),
 	}
 	hwnd := C.newWindow(toUTF16(title), C.int(width), C.int(height), unsafe.Pointer(w))
 	if hwnd != w.hwnd {