Gtkwidget under mouse cursor or type of widget

["zielone" <zielone0 poczta onet pl>]

Hello

Is there a way to obtain pointer to any gtkwidget from other application
I click on some window and i want to receive pointer to this clicked
object

I know how i can do it in xlib, from window id in xlib i can receive
gdkwindow
But i dont know how to get gtkwidget from gdkwindow or xid:/

What i have to do is check what is type name of clicked window, for
example
If i clicked edit control i should receive GtkEntry, if i clicked button
control
I should receive GtkButton, i use for this
g_type_name(GTK_WIDGET_TYPE(pWidget))
But i dont have this pointer pWidget:/ for controls in my window is
simple to get widget object
But from other app i dont have idea how can i do it:/

Maybe i can distinguish types of object in xlib or gdk???? I want to
have unique
Indetifier of object type, that i can obtain if user click frame or edit
or button etc

Thanks for any help\
michal