[wvxvw]

<?xml version="1.0" encoding="utf-8"?>
<mx:Application borderStyle="none" xmlns:mx="http://www.adobe.com/2006/mxml" applicationComplete="appComplete();">

	<mx:Script>
		<![CDATA[
		import mx.containers.Grid;
		import mx.controls.Button;
		import mx.containers.GridItem;
		import mx.containers.GridRow;

		private function appComplete():void
		{
			var gr:Grid = new Grid();
			var bt:Button;
			var rw:GridRow;
			var it:GridItem;
			for(var i:int = 0; i < 2; i++)
			{
				bt = new Button();
				bt.label = "Foo";
				bt.width = 100;
				bt.height = 20;
				rw = new GridRow();
				rw.width = 120;
				rw.height = 20;
				it = new GridItem();
				it.width = 120;
				it.height = 20;
				it.addChild(bt);
				rw.addChild(it);
				gr.addChild(rw);
			}
			gr.width = 120;
			gr.height = 50;
			this.addChild(gr);
		}
		]]>
	</mx:Script>

</mx:Application>

Ну, например.