Sapui5 custom bpm inbox task forward?

Hello Experts

I am trying to create a custom inbox in sapui5(sap.uiext.inbox).

Everything is working fine as standard.

Is it possible to add new coloms with custom column names there and hyperlinks?

If not,

I already created a complete custom inbox with custom columns with the help  of this post below.

http://scn.sap.com/community/bpm/blog/2014/09/04/bpm-odata-implementing-a-custom-task-inbox

How can I add the task forward functionality there?

Any informations and suggestions are welcome.

Thanks in advance.

Regards,

Antony.