Is this special to DirSearch and FileSearch because with other keywords like Control, AddEvent an so on the names are in quotes so I used by habit the the same spelling ?
In version 6.30 it worked with the quotes.
Yes, most of the keywords expect to receive a string (and therefore can handle more complex expressions like "Button" & i).
Some keywords like DirSearch, FileSearch and Form.Polygon expect to receive the actual control without quotes.
In the new version the parser works a little bit harder as it needs to add the module prefix where required.