Using Browser Helper objects in C. [Help]

Okay, BHO as we all know (Browser Helper Objects) can be used to inject html/javascripts into a browser process. Now here is what I am looking for,
For instance, I have a website, business website, and I always want to take surveys of people who have visited the website, for our service improvement or something,now I use an already written Browser helper object so that once the user visits our web, the survey form comes out, so I can get the information entered by the user. How possible is this with C? How can I use C to inject a browser helper object which has already been written into a browser process? If possible, an assistance with a source code will be greatly appreciated!

I am quite new to this.

What's a BHO? It seems specific only to Internet Explorer. Why not start with a simple example first? Top results of Google gave this example, which is C++ but with minor modifications it should compile with a C compiler

BHO (Browser Helper Objects)

Why do you want something as invasive (and unportable) as a BHO just to conduct a survey?

Especially when everyone else seems to manage it with javascript and some cookies.

The user has an obsession with "injecting" code into HTML. I think he has no idea what it means, let alone why you'd want to do it.

If anything, I'd guess that he'd picked up on the term somewhere and is possibly trying to do something malicious. Fortunately, he lacks the understanding to even get beyond formulating the question correctly, let alone getting answers to it.

Injection is putting things that would not normally be on a website onto it, usually maliciously, by ways that the user doesn't control and wouldn't be willing to allow. If you want to do that, go elsewhere. If that's not what you mean, rephrase the question (and do a LOT of learning either way). Hint: What does this have to do with C, when we're discussing things on your own website viewed by users in a standard browser?

P.S. If you want to put things in a website you own, just do it, and drop the "injection" terminology.

P.P.S. The things I suspect you actually want to do? They are not easy, and operating systems and browsers are designed to STOP you being able to do them. You won't run a BHO on my system by sending me to a webpage, I guarantee it.