Exporting UML diagrams to MS Visio

Hello,

I only see an option to export diagrams as jpg, png, or svg. Neither of these options allow me to edit the diagrams in Visio. For that matter, I can't modify the diagrams either unless I do it through some option in Netbeans.

I saw somewhere that the diagrams are saved as XMI as well.

Has anyone exported the diagrams and modified them?
Secondly, would the XMI format allow me to do such a thing?

Should I just use another tool such as, Understand, to generate the diagrams. Understand allows exports to MS Visio.

Thanks, L