https://invisible-island.net/xterm/xtoolkit/
XtAppAddActions - register an action table
#include <X11/Intrinsic.h>
void XtAppAddActions(XtAppContext app_context, XtActionList actions,
Cardinal num_actions);
app_context
Specifies the application context.
actions Specifies the action table to register.
num_args Specifies the number of entries in this action table.
The XtAppAddActions function adds the specified action table and regis-
ters it with the translation manager.
XtParseTranslationTable(3)
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
X Version 11 libXt 1.3.1 XtAppAddActions(3)