Hide Captivate Objects from MSAA tree

Hello all,

I was wondering if there was a way to completely hide an object from the MSAA (accessibility) tree while leaving it on-screen?  If I uncheck the "auto-label" box and leave the Accessibility "Name" and "Description" fields blank, objects still show up in the MSAA tree as "Graphic - Visible," but I want to omit them entirely.  This would be useful to clear out purely decorative elements on a slide from the accessibility tree so that the only items in the tree are related to actual instructional content.