Web Applications

I need a plugin for asp.net as a text editor to plugin to my application to upload Microsoft word document that will allow me to add water mark to my uploaded word documents. I shall be able to add header and footer on the said text editor. I had uploaded a sample file to illustrate what I wanted but not all as I must be able to change and edit the water mark to my [login to view URL] examples the kind of google and yahoo compose pages allow lots of flexibilities to do your text composition.