Are you trying to close Word from a .NET application (for which this
newsgroup is appropriate), or did you intend to post to a newsgroup/forum
which deals with Word? If the latter, I suggest you also tell them which
operating system you are using and which version of Word. (Or just google
it.)
In the tree on the left, open English, then open Office and Desktop
Applications. In the Office and Desktop Applications
subcategory, find and open the Word subcategory. Find a group there
for your question.