I have a form-based application and I have attempted to add serial port interface by adding the comm control to the project, adding the control to my form, and assigning a control variable and an event(message) handler. After doing these steps, compiling and attempting to run, I get an error box that says "unable to create empty document". What remains to be done to make this work? I am following the steps I found in the misc. section of code guru. thanks.