Insert formatted text with a macro

Having the history of the question

The relevant lines are

    labelString = oCurs.ListLabelString
    oCurs.getText().insertString(oCurs, labelString & " ", False)

I’d like to insert labelString as a formatted string with char style ZZZ.

In HTML-ish, that would be equivalent to

 <p><span class="ZZZ">'content of labelString'</span> ... </p>

Placing at the start of the paragraph:

     oCurs.gotoStartOfParagraph(false)
     oCurs.CharStyleName = "Strong Emphasis"
     labelString = oPar.ListLabelString & " "
     oCurs.getText().insertString(oCurs, labelString , False)