IXRPopup::SetIsOpen (Compact 2013)
This method sets whether the popup is to be displayed on the screen.
virtual HRESULT STDMETHODCALLTYPE SetIsOpen(
__in bool IsOpen
) = 0;
[in] A bool. true if the popup is to be displayed; otherwise, false.
Returns a standard HRESULT value.
Although it is read/write and technically is settable in XAML, setting a value for IsOpen in XAML is not typical.