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File Extensions

The File Extensions view shows the file extensions included in the MSI and lets you configure how Windows handles files installed by your application.

File extension information is stored in the Extension and Verb tables.

Master Packager Advanced Editor - File Extensions view

Fields

FieldDescription
Executable FileSpecifies the path to the executable used to open the associated file extension.
ExtensionDefines the file extension.
ProgIDDefines the Programmatic Identifier (ProgID) Windows uses to handle the file type. The ProgID links the extension to icons, descriptions, and available verbs.
VerbDefines the action name, such as open, print, or edit.
CommandSpecifies the executable that runs when the verb is invoked.
ArgumentSpecifies the command-line argument passed to the executable.

Default action

One verb can be set as the default action. Windows uses that verb when the user double-clicks the file.