Office Integration for SP2013 Workflow Tasks

Hello

When I open an Office document that is connected to a running reusable SharePoint 2010 workflow with open task assigned to my user, then a "WORKFLOW TASK" bar with a "Open this task..." button appears in Office 2013.

How can I use these "Open this task..." button in Office 2013 with SharePoint 2013 workflow tasks?
I need this function for a user-friendly document approval within MS Office.

Thanks in advance!