set-mwm-buttons! -- Set the mwm-buttons flag of WIN to boolean FLAG.
Synopsis
(set-mwm-buttons! flag #&optional win)
Description
Set the mwm-buttons flag of win to boolean flag.
The mwm-buttons flag controls whether any of this window's
flags obey their mwm-flags. See set-button-mwm-flag!. win defaults
to the window context in the usual way if not specified.