retrieve object tag's DATA attribute

[Ralf]

hi,

I am writing an ActiveX control (using MFC).

To deal with the object tag's PARAM values I use the DoPropExchange()
method.
But on top of that I want to get the URI value of the object tag's DATA
attribute.

<object DATA="http://server/myfile.ext" id="o1" type="image/ext"
width="50" height="50">
<param name="BORDER" value="1">
</object>

How can I retrieve the string "http://server/myfile.ext" ?

Any hint is appreciated...

Thanks!
- Ralf