how to get mouse and keyboard focus?

["Marcio Andrey Oliveira ell" <andreyq terra com br>]

Hello All.

I want to develop a software that periodically gets mouse and keyboard focus
and lock both for some minutes.
In other words, I want to prevent the user to use mouse and keyboard.

Does anyone know what functions of Gtk+ and/or glib can I use?

Thanks in advance.