I'm in PB 12.6, Windows 8, looking at the MonthCalendar control. Setting properties such as MonthBackColor, TextColor, TitleBackColor, etc. have no effect. I found this from Dave Fish, Sybase, 2009:
The Vista operating system does not support several properties for the
DatePicker, EditMask, and MonthCalendar controls and the drop-down
calendar in a DataWindow column.
Unfortunately these are wrapped Microsoft controls
and Microsoft has not corrected these problems on Vista yet.
Is this still a problem? It's hard to believe.