There is no longer an upgrade path from Visio 4 or any other version older
than Microsoft Visio 2000. So you will have to but a newer version. Since
you will be paying full price might as well go for Visio 2007.
Visio Technical has been dropped as a product and the content has been added
to Visio Professional. When Visio Technical existed, there was always
requests or upgrading Visio Technical to Visio Professional. At the time,
Visio Professional and Visio Technical were enhanced versions of Visio
Standard with different enhancements. To get the benefits of both you needed
to buy both products.
When you install the new version, install it over VT4.1. Some of the
stencils in VT4.1 have been retired. (Like the stell x-sections)
John... Visio MVP
Need stencils or ideas?
http://visio.mvps.org/3rdparty.htm
Need VBA examples?
http://visio.mvps.org/VBA.htm
Visio Wishlist
http://visio.mvps.org/wish_list.htm