Working on OpenXML? so, how easy it is to map the content controls in word document to custom XML?You can use Content Control Toolkit, to assist you to create a data-bound document, and it's also a good developer tool for learning about the markup you need for binding controls to data.
Instead of typing the syntax one-by-one to edit/add/remove Custom XML parts, and manipulate content control properties, you can now use the Content Control Toolkit provides the ability to map content controls to custom XML nodes through a simple drag-and-drop UI. This really makes your life easier.
You can download the tool from Codeplex project, which developed by Microsoft's Matt Scott.You can watch the video on video on Channel 9 how the tool works.
You may visit this Andrew's Blog, to see how to use the Content Control Toolkit.