Hi, Can you have more than one Serial Port connection open at a time on a Pocket PC PDA ? The PDA has a Compact Flash RS232 serial port card that plugs into the PDA's Compact Flash slot with a short cable and a 9-pin D-Shell connector for a hardwired serial port connection using Com1. The PDA also has Bluetooth capability and uses Com8 for the serial port connection. Can both Com1 and Com8 serial ports be open at the same time? Does the Serial2.dll support multiple Com Ports being open at the same time on a Pocket PC device? I have a project that uses 2 Pocket PC PDAs. One PDA will be placed in a fixed location and connected to a control box using the hardwired RS232 cable. The 2nd PDA will be mobile and it will communicate with the fixed PDA/control box using the Bluetooth wireless link.