Use of switchable regexp engine

[hogaty]

This solution is implemented in emeditor (version 15.7 and above).
Second engine could be perl flavor engine.
\1 \2 ... Backreferences
(?=text) Positive lookaheads
(?!text) Negative lookaheads

There is source code solution RegExpr for VB & VBA
http://www.aivosto.com/regexpr.html

Implemented as pure VB or VBA source code, it does not require any additional run-time libraries.
But it is commercial product.Single license for 1 developer costs $99 .
RegExpr license terms:
http://www.aivosto.com/regexpr/help/license.html

[Marco]

Interesting!