AdvancedDateTimePicker Class

public class AdvancedDateTimePicker : DateTimePicker

Public Class AdvancedDateTimePicker
	Inherits DateTimePicker

public ref class AdvancedDateTimePicker : public DateTimePicker

type AdvancedDateTimePicker = 
    class
        inherit DateTimePicker
    end

Inheritance

Object    MarshalByRefObject    Component    Control    DateTimePicker    AdvancedDateTimePicker

• Adjustable colors when the control is not focused (or visual styles are disabled).
• Its Value property is redefined so it returns MaxValue if Checked is and instead of throwing exception when invalid date is assigned to it, it simpy changes Checked false (if checkbox is visible), or just ignores the value.
• Consistent font scaling on all platforms when per-monitor DPI awareness is enabled (see AutoScaleFont). Note that it affects font scaling only, so auto-sizing behavior still depends on the current platform.
• When rendering with visual styles on high DPI, preferring always the standard check box sizes. When the standard size cannot be used, improving the rendering quality if CheckBoxRenderingQuality is High.

The following image illustrates a few features of the AdvancedDateTimePicker class, like the default disabled colors difference, and the fixed checkbox rendering on high DPI (the example uses 125% scaling on Windows 11):

Reference