In OpenERP,

I 've created a wizard that allow the user to select partners. So from my wizard I click on 'add' to go into a tree view selection of partner. In this wizard (tree view) there is a string added into the context. I'd like to use this string from the previous wizard. But (and that's normal) when I close the tree view selection and come back to my wizard: context does not contain anymore this string...

How is it possible to return this information?

Thanks