Hi… The listbox for desktop apps, I want to change the color of the scroll bar from grey to green… How to?
You would need to develop your own custom scrollbar based on the Canvas control.
It’s highly possible to hack it for the Mac , thus stealing the draw events from the NSScroller. However this may affect all scrollbars within your entire program.
Probably your safest (and x-plat) way is to do what Anthony says and fake it with a canvas.
You could also do it with Win32 API by intercepting the window messages and using the API to do custom drawing, but you could spend a very long time getting that right in Xojo.