set fontStyle in dynamic text with a combobox

hello,

I'm trying to make a combobox so the user can change the fontstyle they input in a dynamic text field.

Right now it says that the properties of fontStyle and setStyle are undefined properties o f TextRenderer and Textfield.

This is what I have so far.

//change font style

fontStyleCombo.prompt = "Font Style";

fontStyleCombo.addItem({label:"Medium"});

fontStyleCombo.addItem({label:"Bold"});

fontStyleCombo.addItem({label:"Italic"});

fontStyleCombo.addItem({label:"Bold Italic"});

fontStyleCombo.addEventListener(Event.CHANGE, setFontStyle);

function setFontStyle(evt:Event):void

{

     var fontStyles:Object = "Bold";

     if(fontStyleCombo.selectedIndex > -1)

     {

      fontStyles = fontStyleCombo.selectedItem.data;

     }

    var fontStyleFormat:TextRenderer = new TextRenderer();

    fontStyleFormat.fontStyle = fontStyles;

    inputTextRender01.setStyle(fontStyleFormat);

}