I do not use screenscraping. I use the c# WebBrowser class and I get the HTML after I use this class to navagate to a URL. I was able to use yandex by using a "&p=" to navagate to a particular page.
The duckduckgo search engine does not work this way, though.
I have found out how to make a specialized query for YANDEX in a modified URL. I will ask DUCKDUCKGO for advice.
https://duckduckgo.com/api.html does not provide a solution.
Running this, http://api.duckduckgo.com/?q=stuff+to+search&format=xml , in a browser's address bar does not provide anything as http://duckduckgo.com/?q=stuff+to+search does.
This shouldn't be rocket science. I am able to see the HTML code. Shouldn't there be some sort of AJAX tag in the HTML that I can find to make use of?

I think it has something to do with POCO. Does anyone know about POCO?