"Video Director" is a PC software package for basic edit control that comes 
with a cable that connects a serial port to a Control-L jack and also outputs 
infared signals to remotely control a VCR.  
The software allows you to send the usual  START  STOP  PAUSE  signals to the 
Control-L  and receive the Control--L tape counter information for display on 
the screen.
You didn't say what sort of use you have in mind.  I also have some info on 
building and programming a device called a "D-Box" that is supposed to allow 
full Control-L interface for multiple devices.  Let me know if you would like 
me to rustle-up the info on where to obtain the "D-Box" plans.  This is a 
project that requires you to make a curcuit board, solder on the components, 
and program a EPROM.
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