Automate Word plug-ins

We are planning to automate the different plug-ins available in a Word document.

Using C#, we need to interact with textbox, buttons and other controls available in a given plug-in. Is there any way to automate this?

The solution should work with开发者_StackOverflow中文版 both Word 2003 & 2007.

Check out the Office Open XML as well as the Office API's

http://support.microsoft.com/kb/840817

Sorry for the irrelevant link, I read through it and thought it was an overview for Word API. Here is a more relevant link about interacting with Word programattically.

http://www.c-sharpcorner.com/UploadFile/amrish_deep/WordAutomation05102007223934PM/WordAutomation.aspx