https://gtkdcoding.com/2019/06/25/0047-scalebutton-and-volumebutton.html
Blog Post #0047: ScaleButton and VolumeButton
Ron Tarrant via Digitalmars-d-learn Tue, 25 Jun 2019 05:55:43 -0700
There are a couple of things to watch out for with the
ScaleButton and its offspring, the VolumeButton. Read all about
it here: