Iterate through unknown Properties of an Interface?

Dear All,
 
 I Originally posted this over in the Yahoo Delphi Webbrowser Group  
 but it seems more meant for here. The Interface I am speaking of 
 resides in MSHTLM_TLB but the question is, I believe, generic:
 
 What I am looking for is some interface function that allows me to 
 iterate through the PROPERTIES of the 
 IHTMLStyle Interface
 With out having to know in advance the individual names of the 
 PROPERTIES.
 
 Something to do with how Delphi handles interfaces I suspect and 
not specifically related to any specific Interface.
 
 Any ideas?
 
 Paul


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