This example how to use the Shadow child element to create a simple shadow for a VML shape.
<!-- Include the VML behavior -->
<style>v\: * { behavior:url(#default#VML);display:inline-block }</style>
<!-- Declare the VML namespace -->
<xml:namespace ns="urn:schemas-microsoft-com:vml" prefix="v" />
<v:oval style="height:80pt;width:120pt" coordsize="21600,21600" fillcolor="red">
<v:shadow on="t" type="perspective" matrix=",-92680f,,,0,-95367431640625e-20" origin=".5,.5" offset="0,0" />
</v:oval>