The Application Wizard creates a main.cpp file, and also a directory in your project named "html" with a file named index.html:

<html>
<body>
The main page for the AppWizard project.
</body>
</html>

In NBEclipse you can open a HTML file in text edit mode by right-clicking on the file and selecting the text editor option:

The project html folder is where you can all the files you need for your application, including images, javascript, html files, etc. You can also add folders. For example adding a folder for images is very common. For example, if you created a folder in the html directory named images and added the file logo.jpg, you could add it to your index page by adding the img tag:

<html>
<body>
The main page for the AppWizard project.
<img src = images/logo.jpg>
</body>
</html>