Set the LockContents property of the content control to true to prevent users from editing the control, and set the LockContentControl property to true to prevent users from deleting the control. To prevent users from deleting the control, set LockContentControl to True. To prevent users from editing the control, set LockContents to True. In the Properties window, set one or both of the following properties: In the document that is hosted in the designer, select the content control that you want to protect. To protect a content control at design time
For more information, see How to: Add content controls to Word documents. You can also protect content controls that you add to a document at run time by using a VSTO Add-in project. You can prevent users from editing or deleting a content control by setting properties of the control in a document-level project at design time or at run time. You can protect a part of a document that is not in a content control. There are several ways you can protect parts of a Microsoft Office Word document by using content controls:
When you protect part of a document, you prevent users from changing or deleting the content in that part of the document. How to: Protect parts of documents by using content controls
