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UpdateCalendarDayOfWeek function

Deprecated. Gets the day of the week that corresponds to a specified day and populates the DayOfWeek member in the specified CALDATETIME structure with that value.


BOOL UpdateCalendarDayOfWeek(
  _Inout_ LPCALDATETIME lpCalDateTime


lpCalDateTime [in, out]

Pointer to the CALDATETIME structure containing the date for which to set the day of the week.

Return value

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

  • ERROR_DATE_OUT_OF_RANGE. The specified date was out of range.
  • ERROR_INVALID_PARAMETER. Any of the parameter values was invalid.


This function does not have an associated header file or library file. The application can call LoadLibrary with the DLL name (Kernel32.dll) to obtain a module handle. It can then call GetProcAddress with that module handle and the name of this function to get the function address.


Minimum supported client

Windows Vista [desktop apps only]

Minimum supported server

Windows Server 2008 [desktop apps only]



See also

National Language Support
National Language Support Functions



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