Yes, you would need to save the file as a .dotm and have this file placed in the user's machines (in their User Templates folder). They can then create new docx files from that template by using File>New or you could use it to create a .docx and put that file on your web interface. Word will then find the 'attached template' and its code when that document is opened on any machine that has the template installed.

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Andrew Lockton
Chrysalis Design, Melbourne Australia