Search notes:

VBA runtime library VBE7

Redirect msgBox
rtcErrObj() returns the err object.

TODO

In the VBA Editor, it's possible to add a reference to VBInternal. Is this somewhat useful? 
thisWorkbook.VBProject.references.addFromFile "C:\Program Files (x86)\Common Files\microsoft shared\VBA\VBA7.1\VBE7.DLL\3"

See also

msvbvm60

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