How do I access webpage page elements in C++ builder

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C++

HTML

web

Builder

web_browser

Hi, I'm having trouble working with TWebBrowser in RAD Studio Xe8 C++ builder.

I can't figure out how to access elements on a webpage, like reading the content of an input field...
All the relevant examples that I've found are in Delphi, I tried using this WebBrowser1->Document->getElementByID("input1")
But the method isn't a member of Document which type is IDispatch and I don't know what that is, Can I access the methods that I'm looking for through this IDispatch class? or am I on the wrong path?

Any simple code would be nice.
Thank you in advance

What I have tried:

WebBrowser1->Document->getElementByID("input1")

IHTMLDocument2 *Doc = dynamic_cast<IHTMLDocument2 *>(WebBrowser1->Document);

IHTMLDocument2 *Doc;
Doc=(IHTMLDocument2)WebBrowser1->Document;