Help building my first widget

Hi Everyone, I have built a couple of flex apps but I do not want to rebuild all the functionality that exists in the ARCGIS viewer for flex. I am using arcgis server 10.1 and Flex application builder 3.4. I can not find step by step instuction to build a simple widget. Realistically all I want to do is parse the url for an unique id, select it or hightlight it and zoom to it. (ie http://server/Map/index.html?id=44785. The esearch widget is great but it the widget has a large foot print on the screen and does not hightlight the point unless the mouse hovers over it in the list. The highlight also goes away if the widget is closed with is not great either.

I just need to know how to get started. I added a simple widget into Flash Builder and I keep getting an error about the basewidget but I can not find a basewidget.swc to add to the library.

Thanks,
Mike