How to get "Facing Pages" and "Allow Selected Spread to Shaffle"

Hi everyone,

I spent lots of time but i coudnt find a way to get these two properties.

Document Setup->Facing Pages

and

RightButton over the Page panel -> Allow Selected Spread to Shaffle

About second one i tried:

InterfacePtr<IPageLayoutPrefs> iPageLayoutPrefs(static_cast<IPageLayoutPrefs *>(::QueryPreferences(IID_IPAGELAYOUTPREFERENCES, iSpred)));

bool16 shufflePref = iPageLayoutPrefs->GetShuffle();

but this returns not "Allow Selected Spread to Shaffle" and "Allow Document Pages to Shaffle"

Can someot helps me to get the right prefs.

Thanks!