vs2005 窗体退出事件

在Designer.cs文件中的委托~~

this.Closing +=new CancelEventHandler(Form1_Closing);

private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
// Determine if text has changed in the textbox by comparing to original text.
if (textBox1.Text != strMyOriginalText)
   {
// Display a MsgBox asking the user to save changes or abort.
if(MessageBox.Show("Do you want to save changes to your text?", "My Application",
         MessageBoxButtons.YesNo) ==  DialogResult.Yes)
      {
// Cancel the Closing event from closing the form.
         e.Cancel = true;
// Call method to save file...
      }
   }
}