Print Activiti Form from Within the Form

[benenatichristi]

In Alfresco Activiti 1.9,  I would like to add a "Print" button to a form which, when the process is run, generates a document for printing based on the current screen contents and a template.    Basically, from within the form I would like to perform the Generate Document Task functionality.  I'd appreciate any help in getting this to work.   Thanks.