Editing word table using C#

Question

Hi All, I want to search a Microsoft Word document from the end and then edit the the first table that is found.To the first table that is found I want to Copy a column on the basis of column heading and then paste the same column(with a different name provided by user) in the same table and Save the documnet. I want this to be done for all the documents that user selects from a list view containing the path of documents. PLease guide me so that I can complete this task ASAP. Note:For all the documents only the last table has to be modified and I want to do this using C# Windows Application. Thanks