Abstract of INFO-MAC archived encoded Mac binary file
   'dev/card/controlkey-xfcn.hqx'
  Uploaded 08/21/1998   36101 bytes

From: rolf.heller@magnet.at
Subject: ControlKey XFCN 1.3

  
This stack contains an XFCN that returns the state of the control key. 
 
Usage in HyperTalk: 
if controlKey() is up|down then ... 
 
Requirements:  
The XFCN needs System 6.0.5 and any version of HyperCard. 
  
Regards  
Rolf Heller <rolf.heller@magnet.at>