The return value of the message box

1 /// <summary>2         ///1. When the user closes the form, the FormClosing event of the form is triggered;3         ///2, in the FormClosing event handler to determine the return value of the message box, if the return value is DialogResult.OK, the form is closed,4         ///Otherwise, the form does not close. 5         ///3, in the FormClosing event processing method exists in the FormClosingEventArgs type parameter E,6         ///can be through E. Cancel=true cancels the event and prevents the form from closing. 7         /// </summary>8         /// <param name= "Sender" ></param>9         /// <param name= "E" ></param>Ten         Private voidForm_formclosing (Objectsender, FormClosingEventArgs e) One         { A             //DialogResult: Return value -             if(Dialogresult.ok!=messagebox.show ("are you sure you want to quit? ","Prompt Message", messageboxbuttons.okcancel,messageboxicon.question)) -             { theE.cancel=true; -             } -}

The above code, which indicates that the event triggered by the closing form

The return value of the message box