The first step to use WebApp.Net on your project is to download the related package from the WebApp.Net web site. If you haven't check yet the official web site please take some times to discover the demo (to use preferably on your iPhone or iPod Touch) and available packages, including base package and graphic package.
Once you've downloaded the base package, unpack it and copy the WebApp folder to the root of your web site or development folder. Then, add the following line to your page.
You should not change the content or structure of the WebApp folder in order to ease package updates. If you want to change styles (colors, fonts, ...) please consider to create a new CSS file and overload existing styles. For more informations about how to do this, refer to the releated section.
You can start playing with the micro-framework trying the following sample. It shows a simple page with two layers and a back buttons to switch from one layer to the other.