When setting min/max dates on the date editor, is there any way to make it paint dates that are outside the min and max range using a different appearance so as to make them look obviously un-selectable to the user?
You might want to look at using UltraCalendarCombo instead of UltraDateTimeEditor, also. UltraCalendarCombo is not reliant on the inbox MonthView control.
Can you adjust the highlighted date (the red square) on that one as well?
I don't think it displays a red square. If I recall, it uses the system highlight color in a box around the date. It's a whole different look for the dropdown area.
But I am pretty sure that you can change any appearance or colors you want on UltraCalendarCombo. The Appearances are all on the UltraCalendarLook object.