ERROR_POINT_NOT_FOUND - 1171 (0x493)

Technical Background

The ERROR_POINT_NOT_FOUND error code is returned by the Windows API function GetMouseMovePoints. This function retrieves a sequence of points representing mouse movements. The error indicates that one or more points passed to this function are not present in the buffer provided.

Error Details

When calling GetMouseMovePoints, if any point specified in the input parameters does not exist within the buffer, this error is generated. The buffer contains a series of points recorded during mouse movements, and each call to GetMouseMovePoints expects valid indices into this buffer.

Common Causes

• Invalid Parameter Values: Passing an index that exceeds the bounds of the buffer.
• Incorrect Object Type: Using the function in contexts where it is not applicable (e.g., attempting to retrieve mouse movement points from a non-mouse input device).
• Exceeding Limits: Attempting to access more points than are available in the buffer.

Real-World Context

This error typically occurs when an application attempts to process mouse movement data and encounters invalid indices. It is important for developers to ensure that all indices passed to GetMouseMovePoints are within the valid range of the buffer.

Is This Error Critical?

The severity of this error depends on the context in which it occurs. If the application is handling user input, the error might be non-critical and can be handled by retrying the operation with corrected parameters. However, if the error persists or leads to unexpected behavior, it may indicate a deeper issue that needs further investigation.

How to Diagnose

To diagnose this error, follow these steps:

1. Review Operation Context: Ensure that the function is being called in an appropriate context (e.g., during mouse movement events).
2. Validate Parameters: Verify that all indices passed to GetMouseMovePoints are within the valid range of the buffer.
3. Confirm Object Types: Confirm that the input device is a mouse and not another type of input device, as GetMouseMovePoints is specifically designed for mouse movement data.
4. Verify Input Data: Check if the buffer contains sufficient points to satisfy the request.

How to Resolve

To resolve this error, take these actions:

1. Correct Parameter Usage: Ensure that all indices passed to GetMouseMovePoints are within the valid range of the buffer.
2. Adjust Operation Context: If the function is being called in an inappropriate context, adjust the operation context to ensure it aligns with the intended use case.
3. Restore Data: If data corruption or loss is suspected, restore the buffer contents from a backup or reinitialize the buffer if necessary.
4. Retry Operation with Valid Inputs: After correcting any issues, retry the operation with valid input parameters.

Developer Notes

Developers should be cautious when using GetMouseMovePoints and ensure that all indices passed to it are within the bounds of the buffer. Proper validation of input parameters can prevent this error from occurring.

Related Errors

• ERROR_INVALID_PARAMETER: Indicates that one or more invalid parameters were specified in a function call.
• ERROR_BUFFER_OVERFLOW: Occurs when an attempt is made to write data beyond the end of a buffer.

FAQ

Q: What does ERROR_POINT_NOT_FOUND mean?

A: It indicates that a point passed to GetMouseMovePoints is not found within the buffer.

Q: How can I prevent this error from occurring?

A: Ensure all indices passed to GetMouseMovePoints are within the valid range of the buffer and verify the input device type before calling the function.

Summary

The ERROR_POINT_NOT_FOUND error code is a specific technical issue that occurs when invalid points are passed to the GetMouseMovePoints function. By understanding its context, causes, and resolution methods, developers can effectively handle this error in their applications.