[Xcb] knowing when the X server will send the reply

[Vincent Torri]

>> is it possible to know when the X server will send a reply ?
>
> No -- applications request to receive events via the EventMask, but
> that's only picked up on after the event has been sent, obviously.

hmm, i found that :

http://xcb.freedesktop.org/ProtocolExtensionApi/#index5h2

it seems that it's useful only for extensions, but can it be used for the 
core protocol too ?

Vincent