void gtk_widget_set_focus_child ( GtkWidget* widget, GtkWidget* child )
child as the current focus child of
This function is only suitable for widget implementations.
If you want a certain widget to get the input focus, call
gtk_widget_grab_focus() on it.
A direct child widget of
NULLto unset the focus child of
The argument can be
The data is owned by the caller of the function.