How to create a document with content controls.

Hi Friends,

     need your help in understanding content controls concept using OOXMl.

need your help in few queries below.

1. how to add a content control in word document while creating a word document.

2. how to set the properties to the content controls.

3. how to make the whole word document locked for editing except few content controls.

Please help me out ASAP.

Thanks in advance