This is a sample HelloWin ported from Petzolds book (chapter 3) to illustrate the IntPtr issue for classname on CreateWindow

namespace HelloWin

            string szAppName = "HelloWin";

                        Win32.DrawText (hdc, "Hello, Windows 98!", -1, ref rect,

                "The Hello Program", // window caption

        Arguments = "/c echo hello user ^<!^> && pause",

            MessageBox(hWnd, L"Hello bn", NULL, MB_OK);

        string testString = "Hello p/Invoke";

MessageBoxW(0, "Hello from C#", "pinvoke.net", 0);

    Hello = 7,

    Hello = 7

    String title = "Hello";

    Dim content As String = "Hello World!"

        G.DrawString("Hello", myFont, Brushes.Red, LeftEdge, 40)

            Dim Text = "Hello"

            Console.WriteLine("Hello, World!");

            sw.WriteLine("Hello world {0}", i);

        string[] formatArgs = new string[] { "Hello", "world" };

        string[] formatArgs = new string[] { "Hello", "world" };

Text1.Text = SendToUsbPrinter(”Hello world.”)

''' [BandObject("Hello World Bar", BandObjectStyle.Horizontal | BandObjectStyle.ExplorerToolbar , HelpText = "Shows bar that says hello.")]

''' public class HelloWorldBar : BandObject

    <BandObject("Hello World Bar", BandObjectStyle.Horizontal Or BandObjectStyle.TaskbarToolBar, HelpText:="Shows bar that says hello.")> _

Public Class HelloWorldBar2

        Me.button1.Text = "Say Hello"

        'HelloWorldBar2

        Me.Name = "HelloWorldBar2"

        Me.Title = "Hello Bar"

        MessageBox.Show("ZZZZZZ Hello, World!")

''' [BandObject("Hello World Bar", BandObjectStyle.Horizontal | BandObjectStyle.ExplorerToolbar , HelpText = "Shows bar that says hello.")]

''' public class HelloWorldBar : BandObject

<BandObject("Hello World Bar", BandObjectStyle.Horizontal Or BandObjectStyle.TaskbarToolBar, HelpText:="Shows bar that says hello.")> _

Public Class HelloWorldBar2

    Me.button1.Text = "Say Hello"

    'HelloWorldBar2

    Me.Name = "HelloWorldBar2"

    Me.Title = "Hello Bar"

    MessageBox.Show("ZZZZZZ Hello, World!")

                   [In, ComAliasName ( "ShellObjects.wireHWND" )] ref IntPtr hwnd,

//DLL_FUNC int __cdecl Hello(int , int );

    DLL_FUNC int Hello(int a, int b)

      system("ECHO Hello world!")

        msg.subject = "Hello World!";