With VBA64 now fully working, I'm updating this post to v1.3.8 Universal. This attachment on this post contains the VB6 project and form sample updated to work with the universal version (LongPtr), as well as the twinBASIC demo project.

IMPORTANT: For compatibility, this version no longer uses self-subclassing, and like earlier versions, once again requires mTDHelper.bas in all projects. (mTDSample.bas is still only for the demo form).

You can also view this project on GitHub, but currently only this thread has the VB6 sample project/form (even though the code is the same in the cls and twinBASIC form).