在VBA中关闭表单时执行代码（Excel 2007）

I would like to execute some code when a user closes a form using the x button in the top right corner of the window (I have the form load when the excel spreadsheet is opened, and it hides Excel. I want to exit excel once the form is closed, or at least show excel again so the user may exit it manually)I would like to execute some code when a user c