Lock Content Control
There are cases where we'd like to fetch content from Internet and put in document, but don't want to users edit that content.
Bogac, thank you for your feedback! We’re happy to report that this functionality is available in the Word API! Please check out the cannotEdit property of the ContentControl object: https://github.com/OfficeDev/office-js-docs/blob/WordJs_1.3_Openspec/reference/word/contentcontrol.md for more info.
Office Extensibility Team
Simon Hobman commented
This can be done with Office JS by setting the 'cannotEdit' property of the Content Control object. See here: http://dev.office.com/reference/add-ins/word/contentcontrol?product=word