How can I encode control codes such as 'FUNC 1'

[MugeSo]

I want to encode GS1-128, which requires 'FUNC 1' as the 1st code.

[Holger-Will]

func 1 is written as Ï. Just include it in your code as first character...

[MugeSo]

@Holger-Will Thanks.
I can insert FUNC 1, but encoded as a code128B.
How can I enforce as a code128C?

[Holger-Will]

True, func 1 is not treated as a digit by the optimizer. i will have a look into this.