Interesting terms in Microsoft Visual BASIC shrink-wrap license

[Brett Glass <brett@lariat.org>]

Just had to install Microsoft's Visual Basic 6.0 as part of a software
development project, and found the following interesting text in the
"shrink-wrap" license it displays during installation.

"...you may use documentation identified in the MSDN Library portion of the
SOFTWARE PRODUCT as the file format specification for Microsoft Word,
Microsoft Excel, Microsoft Access, and/or Microsoft PowerPoint ("File
Format Documentation") solely in connection with your development of
software product(s) that operate in conjunction with Windows or Windows NT
that are not general purpose word processing, spreadsheet, or database
management software products or an integrated work or product suite whose
components include one or more general purpose word processing,
spreadsheet, or database management software products. Note: A product that
includes limited word processing, spreadsheet, or database components along
with other components that provide significant and primary value, such as
an accounting product with limited spreadsheet capability, is not
considered to be a "general purpose" product."

In other words, Microsoft's "agreement" attempts to prohibit developers
from writing applications that compete with parts of Microsoft's Office
suite. It also prohibits developers from using the docs to develop programs
for non-Microsoft platforms that can read Office files.

Is this enforceable, I wonder?

--Brett Glass