The easiest way to determine the version of MDAC is to right click on C:\Program Files\Common Files\System\ado\msado15.dll, select Properties, and then consult the Version information. The version information has the same format as that of the FullInstallVer value -- x.xx.yyyy.y, where x.xx is the version number.

An alternative way to determine the version of MDAC you’re using is to consult the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DataAccess registry key. The FullInstallVer key provides a value of the form x.xx.yyyy.y, where x.xx is the version number (e.g., if the FullInstallVer value were 2.70.7713.0, it would mean that MDAC 2.7 is installed on the system).

For the most comprehensive way to check which version of MDAC is installed, you should unzip and run the Microsoft utility "MDAC Com Check", filename is "cc.exe". This utility can be found in the "...Extras\MDAC\MDAC_Component_Checker" folder of your HelpMaster Pro V6 installation CD, or downloaded from the Microsoft web site.