Note: This documentation is preliminary and is subject to change.
Zero or more DIEP_* values denoting parameters of the effect that can be modified while the effect is playing. For a list of possible values, see InputeffectGetparameters. If an application attempts to change a parameter while the effect is playing and the driver does not support modifying that effect dynamically, the driver is permitted to stop the effect, update the parameters, then restart it. For more information, see InputeffectSetparameters.