Fires when the up/down buttons are clicked, before their built-in processing.
The event handler receives an argument of type SpinButtonClickEventArgs containing data related to this event. The following SpinButtonClickEventArgs properties provide information specific to this event.
| Property | Description |
|---|
| Delta | Equals to 1 if the up button was pressed, equals to -1 if the down button was pressed. |
| Handled | Gets or sets a value indicating whether the built-in processing of the up/down button click should be omitted. |