checkbox { 
  color: 0x0000FF; 
  embedFonts: false; 
  fontFamily: Arial;
  fontSize: 24; 
} 

import mx.controls.CheckBox; 
  var oStyle:Object; 
  var ccbTest:mx.controls.CheckBox; 
  var styles = new TextField.StyleSheet(); 
  styles.onLoad = function(bSuccess:Boolean):Void { 
   if (bSucess) { 
      oStyle = this.getStyle("checkbox"); 
      for(var i in oStyle){ 
        ccbTest.setStyle(i, oStyle[i]); 
      } 
    } else { 
    trace("Error loading CSS file."); 
  } 
}; 
styles.load("styles.css");