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From: swick@ATHENA.MIT.EDU (Ralph R. Swick)
Newsgroups: comp.windows.x
Subject: Re: keysymdef.h: How do I detect <ctrl>-(letter)?
Message-ID: <8912121344.AA12746@LYRE.MIT.EDU>
Date: 12 Dec 89 13:44:41 GMT
References: <20574@pasteur.Berkeley.EDU>
Sender: root@athena.mit.edu (Wizard A. Root)
Organization: DEC/MIT Project Athena
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    From: pasteur!argon.berkeley.edu!bchen@UCBVAX.BERKELEY.EDU  (Benjamin Chen)

    I can't find any keysyms for <ctrl>-(letter)
    sequences such as <ctrl-a>.

Thats 'cause there aren't any.  If you have the modifier mapping
table setup correctly (or haven't changed it since server startup),
then the server will set one of the 8 modifier bits (i.e. ControlMask)
in XKeyEvent.state and you can ignore the KeyPress event for Control.