diff --git a/wintable/api.h b/wintable/api.h
index 3d36379..f6895e5 100644
--- a/wintable/api.h
+++ b/wintable/api.h
@@ -15,22 +15,17 @@ static void addColumn(struct table *t, WPARAM wParam, LPARAM lParam)
 HANDLER(apiHandlers)
 {
 	intptr_t *rcp;
-	BOOL tfbool;
 
 	switch (uMsg) {
 	case WM_SETFONT:
 		// don't free the old font; see http://blogs.msdn.com/b/oldnewthing/archive/2008/09/12/8945692.aspx
 		t->font = (HFONT) wParam;
 		SendMessageW(t->header, WM_SETFONT, wParam, lParam);
-		// let's ensure the values are strictly TRUE and FALSE just to be safe
-		tfbool = FALSE;
+		// if we redraw, we have to redraw ALL of it; after all, the font changed!
 		if (LOWORD(lParam) != FALSE)
-			tfbool = TRUE;
-		update(t, tfbool);
-		// TODO is this needed?
-		if (tfbool != FALSE)
-			// TODO check error
-			InvalidateRect(t->hwnd, NULL, TRUE);
+			updateAll(t);			// DONE
+		else
+			update(t, FALSE);		// DONE
 		*lResult = 0;
 		return TRUE;
 	case WM_GETFONT:
diff --git a/wintable/main.h b/wintable/main.h
index ba85e7a..ff86c35 100644
--- a/wintable/main.h
+++ b/wintable/main.h
@@ -103,8 +103,9 @@ struct table {
 // forward declaration (TODO needed?)
 static LRESULT notify(struct table *, UINT, intptr_t, intptr_t, uintptr_t);
 
-// necessary forward declaration
+// necessary forward declarations
 static void update(struct table *, BOOL);
+static void updateAll(struct table *);
 
 #include "util.h"
 #include "coord.h"
diff --git a/wintable/update.h b/wintable/update.h
index b04f445..edf4b40 100644
--- a/wintable/update.h
+++ b/wintable/update.h
@@ -3,6 +3,8 @@
 // Whenever a number of things in the Table changes, the update() function needs to be called to update any metrics and scrolling positions.
 // The control font changing is the big one, as that comes with a flag that decides whether or not to redraw everything. We'll need to respect that here.
 
+// For my personal convenience, each invocation of update() and updateAll() will be suffixed with a DONE comment once I have reasoned that the chosen function is correct and that no additional redrawing is necessary.
+
 // TODO actually use redraw here
 static void update(struct table *t, BOOL redraw)
 {
@@ -39,6 +41,13 @@ static void update(struct table *t, BOOL redraw)
 	t->vpagesize = height / rowht(t);
 	// and do a dummy vertical scroll to apply that
 	vscrollby(t, 0);
-
-	// TODO invalidate /everything/?
+}
+
+// this is the same as update(), but also redraws /everything/
+// as such, redraw is TRUE
+static void updateAll(struct table *t)
+{
+	update(t, TRUE);
+	if (InvalidateRect(t, NULL, TRUE) == 0)
+		panic("error queueing all of Table for redraw in updateAll()");
 }