Can Isodraw macros add fill to a closed bezier?

[TimSharp]

We do a lot of drawings with cables and I'm attempting to do a macro that creates a cable from a single bezier by using the parallel paths function, joining the beziers, then adding white fill so that several cables can be put on top of each other realistically.

Trouble is, I can't find anything in documentation that adds fill to selected items. And when I use record macro to see what it does, nothing is recorded when I add or change fills - does this mean it can't be done in a macro?

[Savera]

If possible check page 150 of Isodraw macro language reference PDF. There are some syntax to apply fill in an active document. It may be useful to you. I am not sure. Kindly check it.

[TimSharp]

Thanks but it looks like that adds a new color to the toolbar. I'm trying to add fill to specifically selected items, so looks like that won't work.