public void ConstructorTest()
		{
			INuGenServiceProvider serviceProvider = new NuGenControlServiceProvider();
			try
			{
				_sketchCanvas = new NuGenSketchCanvas((IntPtr)(-1), serviceProvider);
				Assert.Fail();
			}
			catch (ArgumentException)
			{
			}

			Button button = new Button();
			button.CreateControl();
			Assert.IsTrue(button.IsHandleCreated);

			try
			{
				_sketchCanvas = new NuGenSketchCanvas(button.Handle, serviceProvider);
			}
			catch
			{
				Assert.Fail();
			}
		}