对话框自动布局类。可以实现对话框控件的自动布局，比如对话框移动尺寸时，其上的控件可以按照预先定义的模式进行自动布局。,Automatic layout of type dialog box. Dialog box enables the automatic layout of controls, such as mobile Size dialog box, the controls on the pre-defined in accordance with the automatic layout mode.