ERROR_PRIVATE_DIALOG_INDEX - 1415 (0x587)
Using private DIALOG window words.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_PRIVATE_DIALOG_INDEX (1415, 0x587) is returned when an operation involving private DIALOG window words fails. This typically indicates a problem with the internal handling of dialog-related operations within the Windows API.
Error Details
This error suggests that there was an issue with accessing or manipulating private DIALOG window words, which are specific to certain dialog boxes and their associated data structures in the Windows operating system. The exact nature of the failure can vary depending on the context in which this code is encountered.
Usage Context
The ERROR_PRIVATE_DIALOG_INDEX error is most likely to be encountered when working with custom or third-party dialog boxes that rely on private window words for internal state management or data exchange.
Developer Interpretation
When encountering this error, developers should consider the following:
- Ensure that all necessary parameters and structures are correctly initialized before calling functions related to DIALOG windows.
- Verify that any custom dialog box implementations adhere strictly to the expected behavior of Windows API functions.
- Check for potential issues with resource management or memory allocation that might affect the internal state of DIALOG window words.
Related Errors
ERROR_INVALID_PARAMETER(0x576): Indicates a problem with one or more parameters passed to a function, which could indirectly lead to an issue with private dialog window words.ERROR_OUTOFMEMORY(0x8007000E): Suggests that the system ran out of memory during an operation involving DIALOG windows, potentially affecting their internal state.
FAQ
Q: What does ERROR_PRIVATE_DIALOG_INDEX mean?
A: It indicates a failure related to private dialog window words in Windows API operations.
Q: How can I troubleshoot this error?
A: Review the context of your operation and ensure that all parameters are correctly set. Check for any memory or resource issues that might affect DIALOG windows.
Summary
The ERROR_PRIVATE_DIALOG_INDEX is a specific technical error code indicating an issue with private dialog window words in Windows API operations. Developers should focus on ensuring correct parameter usage and proper resource management when dealing with custom dialog boxes to avoid this error.