Sets the first day of the week for a month calendar control. You can use this macro or send the MCM_SETFIRSTDAYOFWEEK message explicitly.
Handle to a month calendar control.
Value of type int that specifies which day is to be set as the first day of the week, where 0 is Monday, 1 is Tuesday, and so on.
Returns a DWORD value that contains two values. The high word is a BOOL value that is nonzero if the previous first day of the week did not equal LOCALE_IFIRSTDAYOFWEEK, or zero otherwise. The low word is an INT value that represents the previous first day of the week.
If the first day of the week is set to anything other than the default (LOCALE_IFIRSTDAYOFWEEK), the control will not automatically update first-day-of-the-week changes based on locale changes.
Minimum supported client
|Windows Vista [desktop apps only]|
Minimum supported server
|Windows Server 2003 [desktop apps only]|