gtk-sharp 2.10.0.0 Gtk# is thread aware, but not thread safe; See the Gtk# Thread Programming for details. A VBox is a specific type of for packing widgets vertically. using System; using Gtk; class VBoxTester { static void Main () { Application.Init (); Window myWindow = new Window ("VBox Widget"); myWindow.SetDefaultSize (250, 100); VBox myBox = new VBox (false, 4); //Add the box to a Window container myWindow.Add (myBox); // Add some buttons to the container VBoxTester.AddButton (myBox); VBoxTester.AddButton (myBox); VBoxTester.AddButton (myBox); myWindow.ShowAll (); Application.Run (); } static void AddButton (VBox box) { box.PackStart (new Button ("Button"), true, false, 0); } } Imports System Imports Gtk Class VBoxTester Shared Sub Main () Application.Init () Dim myWindow As New Window ("VBox Widget") Dim myBox As New VBox (False, 0) ' Add the box to a Window container myWindow.Add (myBox) myWindow.SetDefaultSize (250, 100) ' Add some buttons to the box VBoxTester.AddButton (myBox) VBoxTester.AddButton (myBox) VBoxTester.AddButton (myBox) myWindow.ShowAll () Application.Run () End Sub Shared Sub AddButton (ByVal box As VBox) box.PackStart (New Button ("Button"), True, False, 0) End Sub End Class Other ways of laying out widgets include using a horizontal box, (see ), a table, (see ), button boxes, etc. Useful methods for manipulating boxes can be found in the superclass for HBox, . Here is a simple example of the class' usage: using System; using Gtk; class VBoxTester { static void Main () { Application.Init (); Window myWindow = new Window ("VBox Widget"); VBox myBox = new VBox (false, 4); //Add the box to a Window container myWindow.Add (myBox); myWindow.ShowAll (); Application.Run (); } static void AddButton (VBox box) { box.PackStart (new Button ("Button"), true, false, 0); } } Gtk.Box Constructor Internal constructor Pointer to the C object. This is an internal constructor, and should not be used by user code. Constructor The main way to create a new VBox If , all widgets in the box are forced to be equally sized. The number of pixels to place between each widget in the box. Property GLib.GType GType property. a Returns the native GObject type for . Constructor Protected constructor. a Chain to this constructor from subclasses when you manually register a for your subclass. System.Obsolete Constructor VBox Constructor. Instantiates a object using default values for the spacing and homogeneous attributes.