OCX library with C# (ActiveX library)

whats the simplest way to make ocx library working in c#? (I'm using wpf project) I tried to use 开发者_StackOverflow中文版aximp, but when creating Ax[libname]Lib.Ax[libname] object, calling getocx() returns null.

EDIT: I should add, that this lib is for communicating with some specific driver

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Ok, I found solution :) After creating object, it's necessary to call method .CreateControl()