Introduction - If you have any usage issues, please Google them yourself
You can download it http://www.alexfeinman.com/download.asp?doc=tapi1.1.zip. But please confirm for commerical use.
Follow these steps.
1. Refer the Tapilib assembly ( the debug folder in the downloaded zip)
2. Add the namespace : using OpenNetCF.Tapi
3. Use this code.