无标题栏的窗体的拖动功能实现，Delphi添加一个可拖动窗体的按钮，通过对此按钮的控制可移动窗体，实现按住标题栏移动窗口的功能，无标题栏也就不能显示最大化、最小化和关闭窗口的功能，因此本程序自定义了一个关闭窗口的方法，那就是长按ESC键可关闭本窗口。-Form without the title bar and drag functions to achieve, Delphi add a draggable form of buttons to move through this form control buttons to achieve and hold the title bar to move the window function, and no title bar will not Show maximize, minimize and close a window, so this procedure to customize a way to close the window, that is long press the ESC key to close the window.