HWND on Win32 API to Qt widget

[delio]

How to convert HWND on Win32 API to Qt widget?
I know that I have to use QWidget::winId().
but I don't know how to write it
Please give me an example.
Thanks

[ScottR]

If you are asking how to find the QWidget which has HWND x,
@
QWidget* theWidget = QWidget::find((WId)x);
@

If you are asking how to find the HWND associated with a QWidget x,
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HWND foo = x.effectiveWinId ();
@