How can I change the caption of tooltip of UltraMonthViewMulti? When I set someday to be a holiday,the tooltip shows like this: "Holidays:\r\nHolidayName". How can I change the caption "Holidays:"? Or just hide it?

I tried the ResourceCustomizer, but I cannot find the resource string. My version is 2009.2.

http://help.infragistics.com/Help/NetAdvantage/WinForms/2009.2/CLR2.0/html/WinSchedule_Resource_Strings.html

Thanks in advance.