GtkInvisibleA widget that is not displayed on the screen.
Hierarquia de Objetos
The GtkInvisible widget is used internally in GTK+, and is probably not very useful for application developers.
It is used for reliable pointer grabs and selection handling in the code for drag-and-drop.
ConstrutoresGtkInvisible ();-- Creates a new GtkInvisible.
set_screen() Sets the GdkScreen where the invisible object will be displayed.