More work.

darwin/spinbox.m

@@ -34,6 +34,7 @@ struct uiSpinbox {
 // TODO test this; we'll probably have to substitute 10_9
 static CGFloat stepperYDelta(void)
 {
+	// via https://developer.apple.com/library/mac/releasenotes/AppKit/RN-AppKit/
 	if (floor(NSAppKitVersionNumber) <= NSAppKitVersionNumber10_9)
 		return 0;
 	return -1;

doc/drawtext

@@ -9,3 +9,5 @@ font matching is closest match but the search method is OS defined
 weight names in libui do not necessarily line up with their OS names
 
 
+uiDrawFontHandle() may not return a unique handle per instance
+

windows/fontbutton.cpp

@@ -25,8 +25,7 @@ static void updateFontButtonLabel(uiFontButton *b)
 	WCHAR *text;
 
 	text = fontDialogParamsToString(&(b->params));
-	// TODO error check
-	SendMessageW(b->hwnd, WM_SETTEXT, 0, (LPARAM) text);
+	setWindowText(text);
 	uiFree(text);
 
 	// changing the text might necessitate a change in the button's size
@@ -94,8 +93,6 @@ uiDrawTextFont *uiFontButtonFont(uiFontButton *b)
 	return mkTextFont(b->params.font, TRUE, b->params.familyName, TRUE, b->params.size);
 }
 
-// TODO document that the Handle of a Font may not be unique
-
 void uiFontButtonOnChanged(uiFontButton *b, void (*f)(uiFontButton *, void *), void *data)
 {
 	b->onChanged = f;