Hi Frank,
Thanks for contacting Syncfusion Support.
In DateTimePickerAdv, the week back color of the week number can be customized by using the property named WeekInterior, Please make use of the below code example.
Code Example[VB];
'To Change the background color of the week numbers
Me.dateTimePickerAdv1.Calendar.WeekInterior = New Syncfusion.Drawing.BrushInfo(Color.Gray)
|
We have prepared a sample for your reference can it can be downloaded from the below location.
Sample : http://www.syncfusion.com/downloads/support/forum/121787/ze/DateTimeWeekInterior-1535721441
Also, refer to the following screenshot.
Regards,
Senthil