Integrating word in a web app

I want to integrate Microsoft word as part of my web app in the following way: when a user clicks on a button on the web application, word will open and let the user create or edit it's content ( lets say blog posts). When the user closes and saves microsoft word, the document content must be displayed in the site for everyone to see. To conclude myself, i want to add a feature that will let users create or edit their blog posts using word instead of a web text editor ( like ck editor). Anyone here has experience with this kind of feature and can suggest me what is the best way to integrate it? There is no importance for technology. Thank you very much