The Default Programs Page

A default program is the program that Windows uses when you open a particular type of file, such as a music file, an image, or a webpage.

The Default Programs feature applies only when the package is installed on Windows Vista. For lower systems it's ignored.

Register application with Default Programs

This option enables you to register an application from your package to be used through Windows Vista Default Programs.

For additional information please see Microsoft's Platform SDK documentation

Application

This section allows you to specify all the information needed to register an application to Windows Default Programs.

Application description

String that describes the application's capabilities. This field is of Formatted Type and can be edited using Smart Edit Control.

Capabilities Path

Specify the registry key path of the Capabilities key.

The Capabilities key contains all the Default Programs information for a specific application. This field is of Formatted Type and can be edited using Smart Edit Control.

Set your defaults

This section allows you to specify what files types should be associated by default with the application you registered in Windows Default Programs.

This is achieved with the use of a custom action which is ran at the end of the installation.

The options you set here only apply to the user that performs the installation. Your choices won't affect other user accounts on the computer. Also al the further settings performed after the installation through the Default Programs UI are available apply only to the current user.