Hello Dave,

If you just want to edit VHDL file, I'd like to suggest you may try other
3rd party VHDL editors.
VHDL is not native supported in VS 2005. Thereby, VS IDE hasn't built-in
VHDL Editor. We cannot customize the IDE properties to parses VHDL content,
either.

What we can do is to develop a VSPackage to provide language-specific
support for editing source code in IDE. You may refer to the following
documents.
http://msdn2.microsoft.com/en-us/library/bb166570(VS.80).aspx
[How to: Create a Language Service by Using the Visual Studio Language
Service Wizard]

Hope this helps. Please feel free to let me know you have any more concern.
We are glad to assist you.

Have a great day,
Best regards,
Wen Yuan
Microsoft Online Community Support
Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
msdnmg@microsoft.com.
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