Custom drawing a sub-item in a List View

I'm trying to draw a small bitmap in a subitem space of a ListView (set to
vsReport). The ListView has a CustomViewOnDrawSubItem event, but it doesn't
seem to be firing. Is there something simple that I am missing? The OnDraw
and OnDrawItem events seem to fire, but I'd rather just have to code that
one subitem than the whole line. Thanks in advance