Different Versions of ADO

Anyone know any good links to articles that explain the differences in the multiple versions of ADO, specifically 2.1, 2.5, and 2.7?  I just inherited a bunch of systems that all use different versions and I want to get them in sync for development and support reasons.....
jasonboetcherAsked:
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Anthony PerkinsCommented:
This link should tell you everything you ever wanted to know about the different versions of MDAC:

MDAC Installation
Reid Wilkes
Microsoft Corporation

February 2002

Applies to:
     Microsoft® Data Access Components (MDAC)
     Microsoft SQL Server™

Summary: Learn how MDAC gets installed, the recent version history of MDAC, and the common issues that you might encounter during MDAC installation. (12 printed pages)

Contents
Introduction
Installation Versions and Operating System Compatibilities
Installation Versions and SQL Server Versions
MDAC Components Overview
Component Checker Tool
MDAC Rollback
Troubleshooting Setup Issues
Knowledge Base Article Resources

...

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/Dnmdac/html/data_mdacinstall.asp

Anthony
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AndresMCommented:
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BahnassCommented:
Dear Antony
   I was just Passing :-)     a very useful link
      U R My Angel !!!!

Eng. Ibraheem
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jasonboetcherAuthor Commented:
Is it possible to develop applications using two different versions of ADO on your PC?  That is what I really need to know...
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Anthony PerkinsCommented:
You will not be able to make a reference to two different ADO versions in the same application the CLASSID and name are the same (unlike XML).  What you may be able to do (totally untested, as I have never needed to do this) is refer to say version 2.6 and then do the following:

Dim rs26 As ADODB.Recordset

Dim rs20 As ADODB.Recordset15

This last object is normally hidden in the object browser, but can be exposed by right-clicking and selecting "Show Hidden Members"

Anthony

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