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From: zhou@brazil.psych.purdue.edu (Albert Zhou)
Newsgroups: comp.os.msdos.programmer,comp.os.msdos.misc,comp.os.msdos.apps
Subject: Re: Keystroke Software Program
Keywords: Sequential Keystroke Macros
Message-ID: <11550@j.cc.purdue.edu>
Date: 23 Nov 90 15:14:07 GMT
References: <126@metapyr.UUCP>
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Reply-To: zhou@brazil.psych.purdue.edu (Albert Zhou)
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In article <126@metapyr.UUCP> brent@metapyr.UUCP (Brent Layne Robertson I) writes:
>Does anyone know of software or a bbs with software that allows a user
>to type combined keystrokes in a sequential order ie: 
>
>	rather than type "<crtl> c"
>
>	type "<crtl>" then type "c"
>
>This is for an aquaintance who is unable to type combonations of
>keys in a multi-key environment. 

	I haven't seen one. But you can do it by installing a clock interrupt
capturing the flags for Shift, Ctrl, Alt etc, and writing a new Int 10. This
will required the user to hold Ctrl (or whatever) key for certain length of
time. In order not to slow down the system, Set your clock interrupt at, see
2 second or longer, which means you have to hold Ctrl key for at least 2
seconds to allow the interrupt to capture it before your finger move on to 
another key. Here is the pseudo code:

	Program seq_keystroke;
	  Get clock interrupt vector Vec1
	  Get keyboard interrupt vector Vec2
          Set clock interrupt to proc myclock_int
	  Set keyboard interrupt to proc mykey_int
	  Terminate and Stay
	endprogram

  	  Proc myclock_int;
            At every other 2 seconds do  
	      Check Ctrl, Alt, Shift, Capt      
	      if they are pressed, set their flag on
                 else set their flag off
	    enddo
	    Call interrupt at Vec1
	  endproc

	  Proc mykey_int;  
            If any flag for Ctrl, Alt, Ship or Capt is on then
	       Modify the last keystroke in the keyboard buffer
	    Call interrupt at Vec2
	  endproc

	The limitation of this scheme is that it can not recognize such keystrokes when there are other keystrokes piled up in the keyboard buffer. But it is
OK I guess for most applications.