XmCreateScrollBar(3) on Linux
The text 33f4b1f538d1, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
The ScrollBar widget creation function "XmCreateScrollBar" "creation functions" "XmCreateScrollBar"