Abstract: Designing a GUI development toolkit includes creating a windows event class with a property of window predefined condition events and a property of window drag and drop events; creating a windows adapter class with two trigger methods; creating a windows class with a window listener method configured to cause the window to enter into an edit mode in response to detecting the property of window predefined condition events is triggered; and to obtain and save initial location, dragged-to location and the mapping relationship between thereof for each component in the window in response to detecting that the property of window drag and drop events is triggered; and creating a component class with an action listener method defined to cause components in a window to be dragged to other locations of the window in which the components are located in response to detecting that the window is under the edit mode.