Retrieves the first day of the week for a month calendar control. You can use this macro or send the MCM_GETFIRSTDAYOFWEEK message explicitly.
Handle to a month calendar control.
Returns a DWORD value that contains two values. The high word is a BOOL value that is nonzero if the first day of the week is set to something other than LOCALE_IFIRSTDAYOFWEEK, or zero otherwise. The low word is an INT value that represents the first day of the week, where 0 is Monday, 1 is Tuesday, and so on.
Minimum supported client
|Windows Vista [desktop apps only]|
Minimum supported server
|Windows Server 2003 [desktop apps only]|