depends on the types of attached regions and whether <TT>reg</TT>
implements <TT>attach_framed</TT> and <TT>attach</TT>. If <TT>param</TT>
is not set, the default of <code>{switchto=true}</code> is used.
depends on the types of attached regions and whether <TT>reg</TT>
implements <TT>attach_framed</TT> and <TT>attach</TT>. If <TT>param</TT>
is not set, the default of <code>{switchto=true}</code> is used.