That said, I'm not entirely sure Photoshop makes a strong point for making custom UI controls, since besides the primary interaction of pointing and clicking on an image, everything else is either dialogs, menus, and toolbars --- all of which are available in the native UI.
http://wp.xin.at/wp-content/uploads/2017/08/photoshop-cs6-fu...
That said, I'm not entirely sure Photoshop makes a strong point for making custom UI controls, since besides the primary interaction of pointing and clicking on an image, everything else is either dialogs, menus, and toolbars --- all of which are available in the native UI.