I'm using Visual Studio 2010 and Word 2010

I've created one Winform addin in Word following this guide 
[Create addin using VSTO in MS Word](http://www.c-sharpcorner.com/UploadFile/kbpatel/how-to-create-add-ins-using-vsto-in-ms-word/)

Now I want to dock this addin to word panel. I heard that I can do that by custom task pane, I tried but can't figure how.

Is there anyone know how to do this ?

Thank you very much :) I get the pane but can't add winform into it. Finally I have to put all my winform controls into usercontrol and now it works.