The following style constants are used when creating month calendar controls.
Version 4.70. The month calendar sends MCN_GETDAYSTATE notifications to request information about which days should be displayed in bold.
Version 4.70. The month calendar enables the user to select a range of dates within the control. By default, the maximum range is one week. You can change the maximum range that can be selected by using the MCM_SETMAXSELCOUNT message.
Version 4.70. The month calendar control displays week numbers (1-52) to the left of each row of days. Week 1 is defined as the first week that contains at least four days.
Version 4.70. The month calendar control does not circle the "today" date.
Version 4.70.The month calendar control does not display the "today" date at the bottom of the control.
Windows Vista. Dates from the previous and next months are not displayed in the current month's calendar.
Windows Vista. Short day names are displayed in the header.
Windows Vista. The selection is not changed when the user navigates next or previous in the calendar. This allows the user to select a range larger than is visible.