I want to perform the action of creating a new material in a macro. Manually this is done by Right-Clicking the part and selecting "Material" -> "Edit Material". In dialog box I want to navigate to "Custom Material" -> "Plastic" and right-click -> "New Material". How can this be done with a macro? I have only been able to find places where I can apply an already known material to a part, not one where I can define the material then apply it.