diff --git a/new/ui.h b/new/ui.h
index 8387dda..82d549b 100644
--- a/new/ui.h
+++ b/new/ui.h
@@ -17,9 +17,30 @@ void uiQuit(void);
 
 void uiFreeText(char *);
 
+typedef struct uiSizing uiSizing;
+struct uiSizing {
+	intmax_t xPadding;
+	intmax_t yPadding;
+	struct uiSizingSys *sys;
+};
+
 typedef struct uiControl uiControl;
+struct uiControl {
+	void *data;			// for use by implementations only
+	void *internal;			// for use by ui only
+	void (*destroy)(uiControl *);
+	uintptr_t (*handle)(uiControl *);
+	void (*setParent)(uiControl *, uintptr_t);
+	void (*removeParent)(uiControl *);
+	void (*preferredSize)(uiControl *, uiSizing *, intmax_t *, intmax_t *);
+	void (*resize)(uiControl *, intmax_t, intmax_t, intmax_t, intmax_t, uiSizing *);
+};
 void uiControlDestroy(uiControl *);
 uintptr_t uiControlHandle(uiControl *);
+void uiControlSetParent(uiControl *, uintptr_t);
+void uiControlRemoveParent(uiControl *);
+void uiControlPreferredSize(uiControl *, uiSizing *, intmax_t *width, intmax_t *height);
+void uiControlResize(uiControl *, intmax_t, intmax_t, intmax_t, intmax_t, uiSizing *);
 
 typedef struct uiWindow uiWindow;
 uiWindow *uiNewWindow(char *, int, int);
diff --git a/new/uipriv.h b/new/uipriv.h
index 7745c2a..c42cbb0 100644
--- a/new/uipriv.h
+++ b/new/uipriv.h
@@ -2,33 +2,6 @@
 #include <stdlib.h>
 #include "ui.h"
 
-typedef struct uiSize uiSize;
-typedef struct uiSizing uiSizing;
-typedef struct uiSizingComm uiSizingComm;
-
-struct uiSize {
-	intmax_t width;
-	intmax_t height;
-};
-
-// TODO this is a bit iffy; clean it up
-#define uiSizingCommon \
-	intmax_t xPadding; \
-	intmax_t yPadding;
-
-struct uiSizingComm {
-	uiSizingCommon
-};
-
-struct uiControl {
-	void (*destroy)(uiControl *);
-	uintptr_t (*handle)(uiControl *);
-	void (*setParent)(uiControl *, uintptr_t);
-	void (*removeParent)(uiControl *);
-	uiSize (*preferredSize)(uiControl *, uiSizing *);
-	void (*resize)(uiControl *, intmax_t, intmax_t, intmax_t, intmax_t, uiSizing *);
-};
-
 // uncomment the following line to enable memory logging; see leaks.awk
 #define uiLogAllocations