If this is the same 'Mark Hall' that posted the reply
for a VFP6 and WIN NT 3.51 workaround, please send your
mailing address to my E-mail so we can issue you a check.

The workaround worked fine. And even better than an API call. For whatever reason, base pageframes do not work properly, but subclassing a pageframe without any code is a workaround.

We were able to hack the SCX and easily change the classlib and baseclass entries to the new subclass, and the app now works between platforms.

Thanks again for your reply. Hope you spend it on a night out on the town! :)