CRM WebUI: Get Object Guid in BSP_WD_CMPWB

Hi experts,

I've created a view in component CRM_KNOWART_H.

Now I would like to get the guid of the Knowledge Article, which is called.

This value I would like to store in an attribute of my super-class.

However, how can I get/read the guid of the knowledge article?

I guess the DO_PREPARE_OUTPUT is the best position.

But I've absolutly no idea, how I can access the guid.

It would be great, if some of you can give me tips on this matter.

Many thx in advance