Running a VB application in MS Word

Please provide me the code to run a VB application in Microsoft Word

great!!!!
code to run what vb application??
what do you actually want to do?? run some other program or automate some part of word, if the latter try recording a macro first

I am writing some VBA code within MS word. I want to run that code when i click a button from MS word. How will i achieve ?

are you using Forms (as in a form that pops up) ? or do you just want to put a button in the middle of a document or do you want to use a toolbar ?