A library of functions that allow you to easily and quickly insert a perpetual calendar into any Windows program. The calendar appears in a modal dialog box displaying a month at a time. It automatically adapt itself to the host systems language and date format, which means that the names of weekdays and of months are displayed in the language of the system where your program is executed. The appearance of Calendar dialog box is configurable. Leap years are taken into account. Year 2000 compliant. Valid dates range from January 1, 1 to December 31, 9999.