How to use the "Command modifer reference" in Command line

Such as:

@filesonly
Clipboard COPYNAMES=unc

In Command line mode, is this right?
"C:\Program Files\GPSoftware\Directory Opus\dopusrt.exe" /cmd @filesonly Clipboard COPYNAMES=unc

dopusrt can only run single-line commands, so you can't use modifiers with it, at least not directly.

User-Defined Commands can let you put multiple lines into something which itself can then be run as a single-line command. Script Add-Ins can also do the same.

Thank you, That's a good idea, I've forgot the User-Defined Commands.