The error code 0x0000058E translates to ERROR_INVALID_COMBOBOX_MESSAGE. There isn’t a universally documented explanation for this specific error code. However, based on the limited information available, here are two approaches you can take to troubleshoot it:

1. Context and Debugging:

• Context: The most helpful approach would be to understand the context in which you’re encountering this error. This includes:

  • Programming language you’re using
  • Specific functions or libraries related to combo boxes
  • Actions leading up to the error (e.g., adding items, selecting items, setting properties)

• Debugging: Use debugging tools provided by your development environment to inspect the following:

  • Values of variables related to the combo box (e.g., handle, selected index, item data)
  • Call stack to pinpoint the exact line of code where the error occurs

With this context and debugging information, you might be able to identify patterns or specific actions that trigger the error.

2. Search Online Resources:

• Search Forums and Communities: Search online forums and communities frequented by programmers using your chosen language and libraries for combo boxes. Look for discussions or solutions related to ERROR_INVALID_COMBOBOX_MESSAGE or similar errors specific to combo box functionality.

• Library/Framework Documentation: If you’re using a library or framework for UI elements, consult its documentation for combo box controls. The documentation might mention potential error codes or troubleshooting steps related to invalid messages sent to the combo box.

Additional Tips:

• Review Combo Box Usage: Carefully examine your code related to combo box manipulation. Ensure you’re using the correct functions and message constants for the operations you intend to perform.

• Test Functionality: Test your combo box functionality with various scenarios (adding items, selecting items, setting properties) to see if the error is reproducible and under what conditions.

By following these steps and combining context-specific debugging with online resources, you might be able to pinpoint the cause of the ERROR_INVALID_COMBOBOX_MESSAGE error and fix your code to interact with the combo box control correctly.

Remember that due to the lack of official documentation for this specific error code, troubleshooting might require more investigation and exploration of alternative solutions compared to some of the other Win32 errors you’ve inquired about.