xrandr generated event

[Nokan Emiro]

   Hi,

Could someone please tell me what event should an X client
subscribe and handle to update it's knowledge on screen size
(width and height is saved at client startup from DisplayWidth()
and DisplayHeight())?

If a user switches into an other resolution (for emaple form 1024x768
into 800x600 with:

     $ xrandr --output VGA --mode 800x600

), my X client's widht and height needs to be modified somehow,
and I hope XSelectInput() + XNextEvent() can notify me on these
resolution changes...

THX,
Uzlee
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