如何使用MSHTML访问Pseudo Elements（：before，：after等）或Pseudo Classes（：hover，：visited等）？

I'm parsing a document with MSHTML and I need to determine the Pseudo Elements in the document. Right now I have a reference to an IHTMLElement in .net code and I need to determine if this element has pseudo elements such as "before" or "after" applied to it.I'm parsing a document with MSHTML and I need t