Provided by: libmotif-dev_2.3.8-2build1_amd64 

NAME
XmIsMotifWMRunning — A function that determines whether the window manager is running
"XmIsMotifWMRunning"
SYNOPSIS
#include <Xm/Xm.h>
Boolean XmIsMotifWMRunning(
Widget shell);
DESCRIPTION
XmIsMotifWMRunning lets a user know whether the Motif Window Manager is running on a screen that contains
a specific widget hierarchy. This function first sees whether the _MOTIF_WM_INFO property is present on
the root window of the shell's screen. If it is, its window field is used to query for the presence of
the specified window as a child of root.
shell Specifies the shell whose screen will be tested for mwm's presence.
RETURN
Returns True if MWM is running.
XmIsMotifWMRunning(3)