How to open Microsoft Word by function call?

I want to accomplish a few tasks:

1. Open a Word 开发者_如何学Cdocument through my program in C# and create a document path to read or write to.

2. Change the formatting of text in the Word document as if I wanted the Word window to give me the text in RTF format or plain text or docx (supported formats)

3. Retrieve the text in my given format such as RTF from the Word window as the user closes the Word window

These 2 links will help you.

http://nishantrana.wordpress.com/2007/11/03/creating-word-document-using-c/

http://www.c-sharpcorner.com/UploadFile/mgold/CreatingandOpeningMicrosoftDocumentfrom.NETUsingCSharp11262005050939AM/CreatingandOpeningMicrosoftDocumentfrom.NETUsingCSharp.aspx