internal static extern BOOL RegisterRawInputDevices(
     RawInputDevice[] RawInputDevices,
     INT NumDevices,
     INT Size
 );

 internal static extern LRESULT DefRawInputProc(RawInput[] RawInput, INT Input, UINT SizeHeader);

 public void INTExamplesTest07()
 {
     INT num = new INT();
     num.Value = 9;
     num.NullFlavor = NullFlavor.NotAsked;
     Assert.IsFalse(num.Validate());
 }

 public void INTExamplesTest08()
 {
     INT num = new INT();
     num.Value = null;
     num.NullFlavor = NullFlavor.NotAsked;
     Assert.IsTrue(num.Validate());
 }

 internal static extern INT GetRawInputData(
     HRAWINPUT RawInput,
     GetRawInputDataEnum Command,
     /*[MarshalAs(UnmanagedType.LPStruct)]*/ [Out] out RawInput Data,
     [In, Out] ref INT Size,
     INT SizeHeader
 );

        public void ExpressionTest01()
        {
            INT expressionOnly = new INT(){ NullFlavor = NullFlavor.Derived };
                
            XmlDocument mathDoc = new XmlDocument();
            mathDoc.LoadXml(@"<math xmlns='http://www.w3.org/1998/Match/MathML'>
            <mrow>
                <mi>a</mi>
                <mo>&#2062;</mo>
                <msup><mi>x</mi><mn>2</mn></msup>
                <mo>+</mo>
                <mi>b</mi>
                <mo>&#2062;</mo>
                <mi>x</mi>
                <mo>+</mo>
                <mi>c</mi>
            </mrow>
            </math>");

            expressionOnly.Expression = new ED();
            expressionOnly.Expression.XmlData = mathDoc.DocumentElement;
            expressionOnly.Expression.MediaType = "application/mathml+xml";

            Assert.IsTrue(expressionOnly.Validate());
        }

 public void PDVValueNullFlavorTest()
 {
     PDV<Nullable<Int32>> a = new INT();
     a.Value = 3;
     a.NullFlavor = NullFlavor.NotAsked;
     Assert.IsFalse(a.Validate());
 }

 /// <summary>
 /// Ensure that validation succeeds (return TRUE)
 /// When the following values are being populated:
 ///     NullFlavor
 /// And, the following variables are nullified:
 ///     Value       : Initial value
 /// </summary>        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "PDV"), TestMethod]
 public void PDVNullFlavorTest()
 {
     PDV<Nullable<Int32>> a = new INT();
     a.Value = null;
     a.NullFlavor = NullFlavor.NotAsked;
     Assert.IsTrue(a.Validate());
 }

 public void INTNullFlavorTest()
 {
     INT a = new INT();
     a.Value = null;
     a.NullFlavor = NullFlavor.NotAsked;
     Assert.IsTrue(a.Validate());           
 }

 internal static extern LRESULT CallWindowProc(
     WNDPROC lpPrevWndFunc,
     HWND hWnd,
     INT Msg,
     WPARAM wParam,
     LPARAM lParam
 );

 public void INTValueNullFlavorTest()
 {
     INT a = new INT();
     a.Value = 3;
     a.NullFlavor = NullFlavor.NotAsked;
     Assert.IsFalse(a.Validate()); 
 }

 public void INTNullTest()
 {
     INT a = new INT();
     a.Value = null;
     a.NullFlavor = null;
     Assert.IsFalse(a.Validate()); 
 }

 public void INTValueTest()
 {
     INT a = new INT();
     a.Value = 3;
     a.NullFlavor = null;
     Assert.IsTrue(a.Validate()); 
 }

 internal static extern INT GetRegisteredRawInputDevices(
     [Out] RawInput[] RawInputDevices,
     [In, Out] ref INT NumDevices,
     INT cbSize
 );

 public void PDVNullTest()
 {
     PDV<Nullable<Int32>> a = new INT();
     a.Value = null;
     a.NullFlavor = null;
     Assert.IsFalse(a.Validate());
 }

 internal static extern INT GetRawInputDeviceList(
     [In, Out] IntPtr RawInputDeviceList,
     [In, Out] ref INT NumDevices,
     INT Size
 );

 public void PDVValueTest()
 {
     PDV<Nullable<Int32>> a = new INT();
     a.Value = 3;
     a.NullFlavor = null;
     Assert.IsTrue(a.Validate());            
 }

 internal void SetVersionNumber(int value)
 {
     this.versionNumber = new INT(value);
 }