How to call a method of a class in Ax 2012 Enterprise Portal ?

I followed steps as per the MSDN.But i sm stuck in between.

Actaully i created a class TESTWORKFLOWCLASS  inside which  i created a method TESTMETHOD. i want to call this method.

As per MSDN i created New Class Library TESTLIBRARY.After that i am stuck....it's telling to define some namespace.

How can i call TestMethod through EP ?

(Notes :In 2009 we used to call through Proxy->Add any class and it's method,then Generate Proxy in Visual Studio-,then in coding ApplicationProxy.that class will as intellisense....)

But in Ax2012 i am getting difficulty...please suggest me ...