Check for latest revision when form is opened

I'm developing a form for work that will be distributed to many people and I won't always know who has the form.  My plan is to post the form to a website for users to download.  Is there any way to check the website for for the latest revision when the form is open??  In this case I'm thinking when a user opens the form it will check the website, and if a newer version is available I will have a message box stating a new form is available and give a URL.  How would I script something like this?

Hi shippy84,
Sounds like you will need a webservice.  Maybe this link will help http://blogs.adobe.com/formfeed/2009/08/version_control_for_forms_and.html
Good luck
Bruce

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