Run the attached project on a monitor with 100% DPI scaling and open the Excel-like filter popup:
100%:
After moving the form to the second monitor with 150% DPI scaling, the filter popup is not OK:
150%:
The popup is smaller and smaller with each next opening (see the attached gif file) at 150%. If you decide to move back the form on the monitor with 100% DPI scaling, the filter popup is not scaled properly.
Add option to enter new value that is independent from the data source or items.
The selected date is 2024 Feb 29. A custom date format is applied to the control:
this.radDateTimePicker1.Format = DateTimePickerFormat.Custom;
this.radDateTimePicker1.CustomFormat = "yyyy";
When trying to change the date, an ArgumentOutOfRangeException exception is thrown.