<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" initialize="initApp();">
<mx:Script>
import mx.managers.ToolTipManager;
private function initApp():void {
ToolTipManager.showDelay = 0;
}
</mx:Script>
<mx:Button label="Click Me" toolTip="Click this Button to do the same thing"/>
</mx:Application>