How to change the line color of a feature in a drawing

Hi
As in the image below, we want to change the line style of a specific feature.

After completing the collection of features, the line style is changed through macros.

Is it possible to change the line color of a specific feature in a drawing through an API function?

Or any other good ideas?

Thank you.

Warm Regards,

SeonHo Cha.

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