Windows doesn't use bitmaps embedded in .TTF/.OTF (FontForge)

I'm trying to add embedded bitmaps to my outline (vector) font.  It's essentially a 'pixelfont' that is supposed to have a 1:1 "pixel perfect" representation at a size of 12px (which is 9pt, on my 96dpi monitor).  My intention is to force that particular size to render as bitmaps (no anti…