/// \example Hello.py 
/// A basic example: the classic 'Hello, world!' with a button which hides and shows it.
///
/// \example WidgetPosition.py
/// An example of the various modes to position a widget inside a parent container (remember that Nictk.Main and Nictk.Window behave as vertical frames, i.e. pack widgets vertically). You can try to maximize, iconize and resize the window (dragging its borders with the mouse) to see the various behaviors of widgets when the parent is resized.
///
/// \example WidgetOptions.py
/// An example of the most common widget options.
///
/// \example WidgetStates.py
/// A simple example showing the three state "normal", "disabled" and "hidden" of a widget
///
/// \example Dialogs.py
/// A sample of all dialog boxes.
///
/// \example Eventbinds.py
/// This file demonstrates the new features introduct with version 2.1.0 regarding the binding of events and the DISABLED state for widgets.
///
/// \example Events.py
/// An example showing how to manage various types of events, with a scrolling text obtained with the after() method.
///
/// \example winfo.py
/// An example showing all the options for the Nictk.Misc.get_winfo() method (inherited by windows and interior widgets).
///
/// \example Window.py
/// An example wich creates a Nictk.Window, shows and hides it and can change its mode (normal, modal or persistent).
///
/// \example RowFrame.py
/// An example of the use of the Nictk.RowFrame container. It demonstrates the use of the add_row() method for adding to it rows which behave as horizontal frames (i.e. you can pack widget horizontally into them). You can set rows height as absolute, relative (percentual) or "absolute from bottom" values.
///
/// \example VerScrollFrame.py
/// An example of the use of the Nictk.VerScrollFrame container.
///
/// \example RowScrollFrame.py
/// An example of the use of the Nictk.RowScrollFrame container. The file uses the add_row() and del_row() methods) for adding and deleting rows which behave as horizontal frames (i.e. you can pack widget horizontally into them). When the height of the rows stack exceeds the frame height a vertical scrollbar appears on the right.
///
/// \example Combobox.py
/// Example of various operations on the Nictk.Combobox widget.
///
/// \example Entry.py
/// Example of the use of Nictk.Entry widget, with binding to various events.
///
/// \example Listbox.py
/// Example of the use of the Nictk.Listbox widget, with various operations on it and showing its auto add scrollbar feature.
///
/// \example Menu.py
/// Various forms of menus: menubar, combobox, popup.
///
/// \example RCbuttons.py
/// An example of the use of classes Nictk.Checkbutton and Nictk.Radiobutton widgets. They have both a Variable object associated (which automatically updates a label) and a callback with command option. We used a Nictk.RowFrame and the strings "pack", "fill", etc. (alternative to constants PACK, FILL ...) for positioning the widgets.
///
/// \example Scale.py
/// Example of the use of Nictk.Scale widget.
/// \example Spinbox.py
/// Example of the use of Nictk.Spinbox widget: you can set the mode (normal, readonly and autoadd) and the wrap property.
///
/// \example Text.py
/// An example of the use of the class Text.py 


