How can you draw with fill on? (in a macro)

[TimSharp]

I'm trying to do a macro that draws a triangle using create line and append line, and want the completed triangle to have black fill.

I can't see a way to switch fill on in a macro (and trun it off again afterwards).

Is this one of those functions that never made it to macros?

[VladimirN]

How about a program commands which relate to fill (which can be found in Macro Language Reference)?