Control. On Mouse Wheel(MouseEventArgs) Method
Raises the MouseWheel event.
protected: override void OnMouseWheel(System::Windows::Forms::MouseEventArgs ^ e);
protected override void OnMouseWheel (System.Windows.Forms.MouseEventArgs e);
override this.OnMouseWheel : System.Windows.Forms.MouseEventArgs -> unit
Protected Overrides Sub OnMouseWheel (e As MouseEventArgs)
If the vertical scroll bar is visible, which means that the VScroll property is set to
true, the mouse wheel scrolls through the ScrollableControl control vertically. However, if only the horizontal scroll bar is visible, which means that the VScroll is set to
false and the HScroll property to set to
true, the mouse wheel scrolls horizontally.
Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.
The OnMouseWheel method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.