Thanks for the fast response. What you said made sense. There is a lot of groping around using half knowledge when getting to grips with new technologies and I was not at all clear what the service name was doing. I tried substituting the serial port service guid as you suggested. I am still getting...

We have an application written in Vb.net running on a Psion WorkaboutPro handheld running under Windows CE4.2. The application issues tourist tickets using a Zebra cameo 2 bluetooth printer. We have just found the InTheHand library and I have set up a small test application based on the code in one of...