Applications built using Walk are composed of native Windows components, and, as such, the style is set by the implementation provided by Microsoft (this is provided by Common Controls, part of ComCtl32.dll). The version required by Walk (version 6.0) adds support for visual styles; this is the system that provides the ability for applications to use the correct visual style for the version of the Windows desktop that is currently running.

This functionality is available as far back as Windows XP, but comes as standard from Vista onward:

The preceding images show how a simple application will adapt to the theme on different versions of Windows. These illustrations are using the default theme, but the user may apply additional customizations on their desktop, which will also apply to any applications built with Walk.