ToolBar.OnButtonDropDown(ToolBarButtonClickEventArgs) Method
Definition
Important
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Raises the ButtonDropDown event.
protected:
virtual void OnButtonDropDown(System::Windows::Forms::ToolBarButtonClickEventArgs ^ e);protected virtual void OnButtonDropDown (System.Windows.Forms.ToolBarButtonClickEventArgs e);abstract member OnButtonDropDown : System.Windows.Forms.ToolBarButtonClickEventArgs -> unit
override this.OnButtonDropDown : System.Windows.Forms.ToolBarButtonClickEventArgs -> unitProtected Overridable Sub OnButtonDropDown (e As ToolBarButtonClickEventArgs)Parameters
A ToolBarButtonClickEventArgs that contains the event data.
Remarks
Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.
The OnButtonDropDown 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.
Notes to Inheritors
When overriding OnButtonDropDown(ToolBarButtonClickEventArgs) in a derived class, be sure to call the base class's OnButtonDropDown(ToolBarButtonClickEventArgs) method so that registered delegates receive the event.
