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Asked: 2026-05-17T22:56:09+00:00

I’m writing a Browser Helper Object (BHO) for Internet Explorer in C#! I want

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I’m writing a Browser Helper Object (BHO) for Internet Explorer in C#!

I want to look for text nodes in the DOM, which requires me to traverse the whole DOM tree if I want to differentiate between text nodes and other types of nodes. This is supposedly time consuming in C#, but should be almost instantanious in C++ (?).

Is there a way to do the traversing in c++ instead? A dll that I can call from C# perhaps, using DllImport? Is it easy to pass the HTMLDocument to my externally exposed c++-method?

Any other ideas?

Cheers!

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1 Answer

  1. Editorial Team

    Where did you get the “supposedly” from? Most of the time will be spent in the code that implements the DOM. Which was written in C++ by Microsoft.

    Marshal.GetIUnknownForObject() gets you a raw interface pointer that you can pass to native code. It needs to QI that pointer for IHtmlDocument2 and take it from there.

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