What are require_restart, require_close_first, and require_uninstall_first?

require_restart, require_close_first, and require_uninstall_first are returned when the method runs successfully:

• require_restart: A value of 0 means a system reboot is not required after product installation. A value of 1 means a system reboot is required to complete the installation.
• require_close_first: A value of 0 means the product and possibly some related products do not need to be closed before installation. A value of 1 means the product and possibly some related products must be closed before installation.
• require_uninstall_first: A value of 0 means the product does not need to be uninstalled before installation. A value of 1 means the product must be uninstalled before installation.

Example: Suppose a Firefox process is running and InstallFromFile executes successfully with a return code of 0 (WAAPI_OK) and require_close_first is 1. In this case, it indicates an issue because require_close_first with a value of 1 means that Firefox should be closed before running InstallFromFile successfully.