refresh DatePicker to see days with events

Hi,

there´s a calendar with a custum "Embedded" database.
If I open the calendar I can see all events.
I like to see in bold all days with a event in the attach datepicker.
It works if I one time open the calendardialog, I can it also abort.
After them, all days in the datepicker with events are bold.
What must I call?
I´ve send the RedrawControl.
The property BoldDaysOnIdle is true.

Hi,

I´ve found out, that the Microsoft Office Outlook has the same Problems