Hi Rchiu5hk,

I suppose that this thread is duplicate with case Ref. CAS-79911-4ND1kY. Nevertheless here is the answers:

Q1: "How to enable the horizontal scroll bar if more than 10 owner" - You could achive this behavior if you set the properties:
- ultraDayView1.ColumnScrolling = DayViewColumnScrolling.Default;
- ultraDayView1.PreferredInViewColumnCount = 3;
or / and
- ultraDayView1.PreferredInViewGroupCount = 3;
or / and
- ultraDayView1.PreferredColumnWidth = 80;

Q2: "What is this, How to invisible this" - This is "All days events area". If you want to hide this area, maybe one possible approach to achieve this is by using a CreationFilter

Q3: "How to capture the inputed dateTime ...." - I`m not sure what is your final goal, but maybe your could handle ultraCalendarInfo1_BeforeDisplayAppointmentDialog() event and include code to check for overlapping appointments.

Please let me know if you have any further questions.
Regards