In Delphi 12, and possibly some earlier Delphi versions back to Delphi 10.1, compilingHScrollbarHeight andVScrollbarWidth results in a deprecated warning due to calls toStdCtrls.ssVertical etc. (fromStdCtrls.TScrollStyle). Need to use values from theSystem.UITypes.TScrollStyle enumeration instead.

WinControlScrollbars andWindowScrollbars have similar warnings concerning deprecation ofStdCtrls.TScrollStyle.