Arguments Property (Custom Actions)
Specifies command-line arguments for the selected custom action. Applies only to .exe custom actions.
Remarks
The Custom Actions editor provides default values of /Install, /Commit, /Rollback, or /Uninstall, depending on which sequence the action is inserted beneath. You must assure that your .exe file accepts this argument, or change the property to match command-line arguments that are defined in your .exe file.
Note This property is ignored when the InstallerClass property is set to true.