Flex3 弹出窗口问题

[奮鬥_旭]

private function openWindow(window:IBbbModuleWindow):void{				
			var event:OpenWindowEvent = new OpenWindowEvent(OpenWindowEvent.OPEN_WINDOW_EVENT);
			event.window = window;
			globalDispatcher.dispatchEvent(event);
		}

OpenWindowEvent.as

package org.bigbluebutton.common.events
{
	import flash.events.Event;
	
	import org.bigbluebutton.common.IBbbModuleWindow;
	
	/**
	 * Dispatch this event with your IBbbModuleWindow instance attached to add the MDIWindow to the main canvas area of bbb-client.
	 * 
	 */	
	public class OpenWindowEvent extends Event
	{
		/**
		 * The MDIWindow instance to show on the main canvas 
		 */		
		public var window:IBbbModuleWindow;
		
		public static const OPEN_WINDOW_EVENT:String = 'OPEN_WINDOW_EVENT';
		
		/*public function OpenWindowEvent(type:String, bubbles:Boolean=true, cancelable:Boolean=false)
		{
			super(type, bubbles, cancelable);
		}*/
		public function OpenWindowEvent(type:String, bubbles:Boolean=true, cancelable:Boolean=false)
		{
			super(type, bubbles, cancelable);
		}
		
	}
}

这是个弹出窗口，如何修改将该窗口直接放到一个Tab里面如下图
谢谢