Create hyperlinks to folder locations

Hi,

Does anyone know if it's possible to generate a hyperlink that, when clicked, will open a Windows Explorer dialogue at a particular folder location.

I can do links to specific files using the 'file:///relative_path/document.pdf' so trying to find something that will do the same thing except opening a folder so the user can view the contents.

Anyone done this? Any suggesstions appreciated.

Thanks Tris