How to do serial communication using vb.net language

I'm making project of automated polling system using SMS. How can i read the text message in the cellphone and display it in textbox开发者_运维知识库?

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Have a look at the classes in the System.IO.Ports namespace, namely SerialPort. There is even an (albeit brief) example available in the Microsoft KB that illustrates how to send AT commands to a connected modem:

http://msdn.microsoft.com/en-us/library/7x7cdt5c.aspx