Controlling Checkbox Symbol to make Radio Button

I have a need to programmatically create Checkbox controls and Radio Button controls.

I figured out that checkboxes in Word have a way to set the Checked Symbol and the Unchecked Symbol.

I can see the symbol in the StructuredDocumentTag.Text property.
I can also see in in the Range property if I dig for it.

I see the example for creating checkboxes, and I can set the Title and Tag, but the Text is Get only

But how do I CHANGE the Checked Symbol and the Unchecked Symbol programmatically?

@pcleaveland You can use StructuredDocumentTag.SetCheckedSymbol and StructuredDocumentTag.SetUncheckedSymbol methods:

Document doc = new Document();
StructuredDocumentTag sdtCheckBox = new StructuredDocumentTag(doc, SdtType.Checkbox, MarkupLevel.Inline);
doc.FirstSection.Body.FirstParagraph.AppendChild(sdtCheckBox);
sdtCheckBox.SetCheckedSymbol(0x00A9, "Times New Roman");
sdtCheckBox.SetUncheckedSymbol(0x00AE, "Times New Roman");
doc.Save(@"C:\Temp\out.docx");