A external program can send command to Pc Lap Counter by using :
for detection information:
triggerlane.exe n, where n is the lane/car number, more information at http://www.pclapcounter.be/webcam_anglais.html
for track call:
plc_remote.exe "command", more information at http://www.pclapcounter.be/webcamremote.html
for pit stop information:
Pitstop.exe n, where n is the lane/car number, more information here http://www.pclapcounter.be/webcam_pitstop.html
All these programs are located in the folder C:\Pc Lap Counter\