The error code 0x0000059F translates to ERROR_INVALID_SPI_VALUE. This error occurs in Windows programs when you attempt to use the SystemParametersInfo function with an invalid parameter value.

Understanding SystemParametersInfo:

• SystemParametersInfo is a function used to retrieve or set various system parameters in Windows, such as the screen saver timeout, cursor size, or desktop wallpaper.
• The function takes three arguments:
  • uiAction: Specifies the action to perform (get or set a parameter)
  • uiParam: Specifies the system parameter to modify
  • pvParam: Pointer to a variable that holds the new value (for setting) or will receive the current value (for getting)

Causes of ERROR_INVALID_SPI_VALUE:

• Incorrect Parameter Value: The most common cause is providing an invalid value in the pvParam argument that doesn’t correspond to the expected data type or range for the specified system parameter.

• Unsupported Operation: In some cases, trying to set a parameter that is read-only or not configurable through SystemParametersInfo can also trigger this error.

• Code Errors: Mistakes in how you’re referencing system parameters, constructing values, or calling SystemParametersInfo can lead to this error.

Troubleshooting Steps:

1. Verify Parameter Details: Double-check the documentation for SystemParametersInfo to ensure you’re using the correct parameter (uiParam) and providing a valid value of the expected data type for the operation (uiAction).

2. Consult Parameter Documentation: Look up the specific system parameter you’re trying to modify and review its documentation. This documentation should specify the valid value range or data type requirements.

3. Debug Function Call: Use debugging tools to inspect the values you’re passing for uiParam and pvParam in the SystemParametersInfo call. This can help identify typos or invalid data being sent.

4. Review SystemParametersInfo Documentation: Refer to the documentation for SystemParametersInfo to understand the supported system parameters, their data types, and any specific requirements for setting or retrieving their values.

5. Alternative Approaches: If SystemParametersInfo doesn’t support modifying the desired parameter, explore alternative methods depending on your goal. This might involve using registry access or other system configuration APIs (if applicable).

Additional Tips:

• Use constants or well-defined variables to store the system parameter identifiers (uiParam) and valid values for different settings. This improves code readability and reduces errors.
• Consider using higher-level system configuration libraries or frameworks (if available) that might provide abstractions for managing system parameters, potentially simplifying interaction with SystemParametersInfo.

By following these steps and understanding the reasons behind the ERROR_INVALID_SPI_VALUE error, you should be able to identify the issue with your parameter value and fix your code to use SystemParametersInfo with valid parameters for the desired system settings.