EnumDateFormatsW function (winnls.h)

Article
02/09/2023

Enumerates the long date, short date, or year/month formats that are available for a specified locale.

Note To receive a calendar identifier in addition to date format information, the application should use the EnumDateFormatsEx function. Another reason for preferring this function is that Microsoft is migrating toward the use of locale names instead of locale identifiers for new locales, for interoperability reasons.

Note Any application that will be run only on Windows Vista or later should use EnumDateFormatsExEx in preference to EnumDateFormats.

Syntax

BOOL EnumDateFormatsW(
  [in] DATEFMT_ENUMPROCW lpDateFmtEnumProc,
  [in] LCID              Locale,
  [in] DWORD             dwFlags
);

Parameters

[in] lpDateFmtEnumProc

Pointer to an application-defined callback function. For more information, see EnumDateFormatsProc.

[in] Locale

Locale identifier that specifies the locale for which to retrieve date format information. You can use the MAKELCID macro to create an identifier or use one of the following predefined values.

[in] dwFlags

Flag specifying date formats. For detailed definitions, see the dwFlags parameter of EnumDateFormatsExEx.

Return value

Returns a nonzero value if successful, or 0 otherwise. To get extended error information, the application can call GetLastError, which can return one of the following error codes:

ERROR_INVALID_FLAGS. The values supplied for flags were not valid.
ERROR_INVALID_PARAMETER. Any of the parameter values was invalid.

Remarks

Note This API is being updated to support the May 2019 Japanese era change. If your application supports the Japanese calendar, you should validate that it properly handles the new era. See Prepare your application for the Japanese era change for more information.

For details of operation of this function, see Remarks in EnumDateFormatsEx.

Note To enumerate the date formats for locales with alternate calendars, the application should use EnumDateFormatsEx.

Note

The winnls.h header defines EnumDateFormats as an alias which automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	winnls.h (include Windows.h)
Library	Kernel32.lib
DLL	Kernel32.dll