The function returns the value ERROR_CALL_NOT_IMPLEMENTED. This value is returned when a custom action attempts to call a function that can't be called from custom actions. If ERROR_SUCCESS_REBOOT_REQUIRED is returned, the installation completed successfully but a reboot is required to complete the installation operation. The error codes ERROR_SUCCESS, ERROR_SUCCESS_REBOOT_INITIATED, and ERROR_SUCCESS_REBOOT_REQUIRED indicate success.

For more error codes returned by the Windows Installer, see Windows Installer error messages. Note that any error in Winerror.h (such as ERROR_INVALID_DATA) can be returned as well. These error codes are returned by the Windows Installer functions MsiExec.exe and InstMsi.exe. If you need support for a Microsoft product, please go to our technical support site.

If you're a user experiencing difficulty with your computer either during or after installing or uninstalling an application, you should contact customer support for the software you're trying to install or remove. This article is intended for software developers who use Windows Installer to build installer packages for their applications.

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