'Declaration
 
Protected Overrides Sub OnValueChanged( _
   ByVal oldValue As Nullable(Of Date), _
   ByVal newValue As Nullable(Of Date) _
) 

'Usage
 
Dim instance As DateTimePicker
Dim oldValue As Nullable(Of Date)
Dim newValue As Nullable(Of Date)
 
instance.OnValueChanged(oldValue, newValue)

protected override void OnValueChanged( 
   Nullable<DateTime> oldValue,
   Nullable<DateTime> newValue
)

Parameters

oldValue

The old DateTime value.

newValue

The new DateTime value.

Target Platforms: Windows 11, Windows 10, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

DateTimePicker Class
DateTimePicker Members
Base Implementation in OnValueChanged