If you want to use this alias, you can still use it as a command.
/scriptwin these are the parameters
There are several others which do this:
//echo -a $getdirABC
//echo -a $mididirABC
//echo -a $mircdirABC
//echo -a $mircexeABC
//echo -a $mp3dirABC
//echo -a $scriptdirABC
//echo -a $wavedirABC
It looks like what they have in common is that they don't need () in order to return a folder/file name.