Getting specific lines from html body

[lostruler]

Guys,

Based on a html body, how can I filter the lines using a text?

Example:

The variable 's' below returns all HTML body...

Code:

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HtmlDoc d.InitFromWeb("http://www.quickmacros.com/")
str s=d.GetHtml("body")
out s

But I'm just interested in the lines which I can Find the word "API".

Expected result:

<P>Windows API, COM, other dlls, C#, VB.NET, VBScript, C.</P>
<LI><SPAN>Programming language with functions, classes, full dll/API/COM support.</SPAN>

Do you know how can I put that filter?

Thanks for helping.