On Oct 24, 8:56*am, michele wrote:
> hi,
>
> is there any xlib routine or function that do that?

Don't rely on the message header to be visible!
OP is asking: how to know if window clip area is greater than bounding
area>

What do you mean by "bounding area" ?
--
Fred Kleinschmidt

On 24 Ott, 20:10, Fred wrote:

> What do you mean by "bounding area" ?
> --
> Fred Kleinschmidt

thank you for responding, mr kleinschmidt

i intend with b.a. the ""content" of a windows in terms of area
sorry i had mistake with canonical definition

anyway i have found it: it is the visibility event

thank you again

michele