I do not understand those three terms : shortkey, mouse event, floating menu ( lthough mouse event is self explanatory)
The first line of code in the macro (posted/pasted above - but I do not know how to reference it - I can't find an identifier) opens the application (MP3Tag).
Pressing CTRL R is again, a matter of code - also in that screen shot I posted - but has NOT been effective.
RUNNING the Macro has SO FAR been done from the TRY tool, but once the macro achieves the intended aim, would be run from a batch file - which I suppose would qualify as a 'mouse event'.