how to connect cellphone and get data in vb.net

hi
i am developing an application in which user will get cell phone information by using the software
now here
i have successfully detected the com ports available in the system but i am confused how to know which particularly com port is being used by hte cell phone via USB
i need a sample code in which i can display (using a rich text box control) the attached cellphone hardware and then can connect to it to fetch some data from it using the AT commands
i cant understand how to implement it because i never done programming with COM port before it. Kindly help me in this way
and
thanks in advance to all my bros

Moved to the VB.Net forum (COM and ActiveX programming have nothing to do with COM ports).

Hello you can scan ports after device attached and take the newest one from the list.