XmVaCreateMainWindow(3) on Linux
The text 21083971fb40, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A MainWindow widget convenience creation functions. "XmVaCreateMainWindow" "XmVaCreateManagedMainWindow" "creation functions"