XtCallAcceptFocus - calla widget's accept_focus procedure
#include <X11/Intrinsic.h>
Boolean XtCallAcceptFocus(Widget w, Time
  *time);
  - time
- Specifies the X time of the event that is causing the accept focus.
- w
- Specifies the widget.
The XtCallAcceptFocus function calls the specified widget's accept_focus
  procedure, passing it the specified widget and time, and returns what the
  accept_focus procedure returns. If accept_focus is NULL,
  XtCallAcceptFocus returns False.
XtSetKeyboardFocus(3)
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface