There may be a much simpler way, but I just do a post on here, make a board and all that.
Then, before I actually post it (in the end it's never posted) I press the print-screen button (which copys a picture of your screen to the clipboard) then open paint, do a ctrl+v (paste) and crop and save as necessary.
After that, inserting a picture into micosoft word is easy.
Of course this could be done just as easily with any other viewer or engine board, but I like and am used to the size and colors on here, so that's how I do it.
How do you make and insert Chess positions in diagrams for Microsoft Word?