What type of program is this called?

I've been searching and searching and asking around, but I can't find an answer. There are programs that seem to be able to act as servers on localhost while they run 开发者_开发问答and produce pages in memory that allow the user to interact with this program.

Examples of them are: "Mediacoder" and "K9 Web Protect".

Please tell me what kind of programming I need to lookup in order to accomplish the same tasks as these programs. That way I can actually have a direction when I'm googling it in C# or Java or whatever. All answers are welcome on this one.

There exists no special name for desktop applications that also provide a web frontend.

May be you are looking for something like this:

Embedded Web Server in .NET