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ERROR_INVALID_SPI_VALUE
The SPI parameter value is not valid for the selected action
SystemParametersInfo multiplexes many system-wide settings behind SPI_* action codes. The meaning and type of uiParam and pvParam depend entirely on the selected action.
Generic wrappers are therefore error-prone: the same call shape can require a Boolean, structure pointer, size, timeout, or other action-specific value. A value valid for one SPI_* action may be meaningless for another.
What to check
- Log the symbolic
SPI_*action and the concrete parameter type used by the caller. - Initialize any required structure size/version fields before the call.
- Validate numeric bounds and enum values against the documentation for that one action.
- Do not reuse a generic configuration serializer without action-specific conversion and range checking.
This is a parameter-contract failure for the chosen system setting, not a generic permission error while changing system policy.
References
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