You already know that we can develop Force.com applications with custom objects and standard objects in the Force.com platform. Every object has a standard user interface with one or more page layouts. However, we cannot use standard page layouts for complex requirements. Here, Visualforce comes into play. For example, if the customer needs to have drag and drop components, we cannot achieve it from the standard UI. We need to use Visualforce pages to achieve such kinds of requirements.

Visualforce is a web-based user interface (UI) framework, which can be used for building sophisticated, attractive, and dynamic custom user interfaces. Visualforce allows the developer to use standard web development technologies such as jQuery, JavaScript, CSS, and HTML5. Therefore, we can build rich UIs for any app, including mobile apps. We'll be discussing about Visualforce with standard web development technologies and Visualforce for mobile in more depth later in Chapter...