if (!IsPostBack) { 
   CuteEditor.ToolControl toolctrl=Editor1.ToolControls["CssClass"]; 
   if(toolctrl!=null) { 
      CuteEditor.RichDropDownList dropdown=(CuteEditor.RichDropDownList)toolctrl.Control; 
      //the first item is the caption 
      CuteEditor.RichListItem richitem=dropdown.Items[0]; 
      //clear the items from configuration files 
      dropdown.Items.Clear(); 
      //add the caption 
       dropdown.Items.Add(richitem); 
      //add value only 
      dropdown.Items.Add("RedColor"); 
      //add text and value 
      dropdown.Items.Add("Highlight","Highlight"); 
      //add html and text and value 
      dropdown.Items.Add("<span class='BoldGreen'>Bold      Green Text</span>","Bold      Green Text","BoldGreen"); 
   } 
}