To customize day and month names for the pop-up calendar
If you want to customize pop-up calendar names for all fpSpread controls in your project, call the SSSetCalText function and set the lpszShortDays, lpszLongDays, lpszShortMonths, lpszLongMonths, lpszOkText, and lpszCancelText parameters as appropriate.
If you want to customize pop-up calendar names for a specific fpSpread control, call the SSSetCalTextOverride method for each fpSpread control you want to customize, and set the lpszShortDays, lpszLongDays, lpszShortMonths, lpszLongMonths, lpszOkText, and lpszCancelText parameters as appropriate.