Windows form integration with html page

Using Html only is not possible.

You can include applications developed with Flash and Silverlight on your Html page, for example.

There was a time when it was very common to also include ActiveX components (which can be developed in any language) or Java applets ; but this type of resource is a potential risk to the user so there is a tendency to no longer be supported or made difficult for browsers to use.

There are options that make it look like the application is running inside the browser, such as Citrix , but the application is not embedded in an Html page.

You could put a WebBrowser in your form, then put it in the code:

 [nome do webbrowser].DocumentText = "Código HTML em string";
ou [nome do webbrowser].Navegate("url da página HTML ou caminho no computador");

You could use the DocumentBext of the webbrowser to interact, modify the HTML code or read the code, and thus to interact