HyperCard 2.0: Earlier XCMDs and XFCNs Compatibility

Is there a list of XCMDs and XFCNs that are known to work with HyperCard 2.0? I am converting a mission-critical application from HyperCard 1.2.5 to HyperCard 2.0. The application uses a lot of WindowIt XCMDs and MitemView.
As of October, 1990, there was no published list of external routines compatible with HyperCard 2.0. Because the list of available routines changes every day, we doubt that there will ever be such a list. Testing results have shown that better than 80 percent of the tested externals work fine with HyperCard 2.0. We know this is not the answer you're looking for, but it's all we have.

For information on specific XCMDs and XFCNs, we suggest you contact the developer directly.

WindowIt, originally from Third Wave Computing and then Heizer Software has been returned to the original developer. As far as we know, it will not be modified to support HyperCard 2.0.
Published Date: Feb 18, 2012