How to add accessible support for widgets?

I want do some accessible works for my QT application, it include standard widget and my customize widgets.
I have 2 questions as follow:
1. Is standard widget implement the QAccessibleInterface?
2. If I want implement QAccessibleInterface, how to do that? I see it have a sample code in help document, but it seems it have issue when do installFactory. so, is anyone have experience for that?

maybe this can help you.

thanks spirit :)

I know QT support MSAA in windows use the accessible plugin. But which one know if QT can support UIAutomation? I my investigation, QT controls not return the right control patterns.:confused: