For the sake of others who might consider CodeWiz, we wrote: It's quite common for multiple add-ins to conflict, particularly in VC++ 6.0. Not much of the MS interface for add-ins is multi-threaded.
We suspect CodeWiz needs to use he Add-in Comm Library written by the author of Wndtabs. Many add-ins use it to avoid conflict, including VA. It adds a multi-threaded layer to intercepting of commands.