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0x0000058C

ERROR_WINDOW_NOT_DIALOG

The window is not a valid dialog window.

win32decimal 1420

Matched as: the code as given (hex)

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Source: System Error Codes (1300-1699) - Win32 apps · CC-BY-4.0 (MicrosoftDocs/sdk-api, repo license verified 2026-10-09) · retrieved 2026-10-09