'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.

.NET: net5.0, net5.0-windows, net6.0, net6.0-macos, net6.0-windows, net7.0, net7.0-macos, net7.0-windows, net8.0, net8.0-browser, net8.0-macos, net8.0-windows, net9.0, net9.0-browser, net9.0-macos, net9.0-windows, net10.0, net10.0-browser, net10.0-macos, net10.0-windows.

.NET Framework: net40, net403, net45, net451, net452, net46, net461, net462, net463, net47, net471, net472, net48, net481.

Reference

DateTimePicker Class
DateTimePicker Members
Base Implementation in OnValueChanged