12.5 Controlling Input Focus
Xlib provides functions that you can use to set and get the input focus.
The input focus is a shared resource, and cooperation among clients is
required for correct interaction. See the
Inter-Client Communication Conventions Manual
for input focus policy.
To set the input focus, use
XSetInputFocus().
To obtain the current input focus, use
XGetInputFocus().
Christophe Tronche, ch@tronche.com