Sourcecodes - Clipboard Spy

Code:


using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;

namespace ClipboardSpy
{
    public class ClipboardSpyWindow : System.Windows.Forms.Form
    {
        private System.ComponentModel.Container components = null;

        public ClipboardSpyWindow()
        {
            InitializeComponent();

            m_NextClipboardViewer = WinAPI.SetClipboardViewer(this.Handle);
        }

        protected override void    WndProc(ref System.Windows.Forms.Message m)
        {
            // defined in winuser.h
            const int WM_DRAWCLIPBOARD = 0x308;
            const int WM_CHANGECBCHAIN = 0x030D;

            switch(m.Msg)
            {
                case WM_DRAWCLIPBOARD:
                    DisplayClipboardData();
                    WinAPI.SendMessage(m_NextClipboardViewer, m.Msg, m.WParam, m.LParam);
                    break;

                case WM_CHANGECBCHAIN:
                    if (m.WParam == m_NextClipboardViewer)
                        m_NextClipboardViewer = m.LParam;
                    else
                        WinAPI.SendMessage(m_NextClipboardViewer, m.Msg, m.WParam, m.LParam);
                    break;

                default:
                    base.WndProc(ref m);
                    break;
            }
        }


        public void DisplayClipboardData()
        {
            listBoxClipboardContent.Items.Clear();
            
            IDataObject d = Clipboard.GetDataObject();
            
            if(d.GetDataPresent(DataFormats.Bitmap))
                listBoxClipboardContent.Items.Add("Bitmap!");
            
            if(d.GetDataPresent(DataFormats.CommaSeparatedValue))
                listBoxClipboardContent.Items.Add("CommaSeparatedValue");

            if(d.GetDataPresent(DataFormats.Dib))
                listBoxClipboardContent.Items.Add("Dib");

            if(d.GetDataPresent(DataFormats.Dif))
                listBoxClipboardContent.Items.Add("Dif");

            if(d.GetDataPresent(DataFormats.EnhancedMetafile))
                listBoxClipboardContent.Items.Add("EnhancedMetafile");

            if(d.GetDataPresent(DataFormats.Html))
                listBoxClipboardContent.Items.Add("Html");

            if(d.GetDataPresent(DataFormats.Riff))
                listBoxClipboardContent.Items.Add("Riff");

            if(d.GetDataPresent(DataFormats.Rtf))
                listBoxClipboardContent.Items.Add("Rtf");

            if(d.GetDataPresent(DataFormats.Text))
            {
                string tmp = Clipboard.GetDataObject().GetData(DataFormats.Text).ToString();
                listBoxClipboardContent.Items.Add("Text: " + tmp);
            }

            if(d.GetDataPresent(DataFormats.Tiff))
                listBoxClipboardContent.Items.Add("Tiff");

            if(d.GetDataPresent(DataFormats.UnicodeText))
                listBoxClipboardContent.Items.Add("UnicodeText");

            if(d.GetDataPresent(DataFormats.WaveAudio))
                listBoxClipboardContent.Items.Add("WaveAudio");
        }

        // Die verwendeten Ressourcen bereinigen.    
        protected override void Dispose( bool disposing )
        {
            WinAPI.ChangeClipboardChain(this.Handle, m_NextClipboardViewer);

            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        #region Vom Windows Form-Designer generierter Code
        /// <summary>
        /// Erforderliche Methode für die Designerunterstützung. 
        /// Der Inhalt der Methode darf nicht mit dem Code-Editor geändert werden.
        /// </summary>
        private void InitializeComponent()
        {
            this.listBoxClipboardContent = new System.Windows.Forms.ListBox();
            this.SuspendLayout();
            // 
            // listBoxClipboardContent
            // 
            this.listBoxClipboardContent.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
                | System.Windows.Forms.AnchorStyles.Left) 
                | System.Windows.Forms.AnchorStyles.Right)));
            this.listBoxClipboardContent.Location = new System.Drawing.Point(0, 0);
            this.listBoxClipboardContent.Name = "listBoxClipboardContent";
            this.listBoxClipboardContent.Size = new System.Drawing.Size(296, 277);
            this.listBoxClipboardContent.TabIndex = 0;
            // 
            // ClipboardSpyWindow
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(292, 266);
            this.Controls.Add(this.listBoxClipboardContent);
            this.Name = "ClipboardSpyWindow";
            this.Text = "ClipboardSpy";
            this.ResumeLayout(false);

        }
        #endregion

        /// <summary>
        /// Der Haupteinstiegspunkt für die Anwendung.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new ClipboardSpyWindow());
        }

        private System.Windows.Forms.ListBox listBoxClipboardContent;


        IntPtr        m_NextClipboardViewer;
    }

    public class WinAPI
    {
        [DllImport("User32.dll")]
        public static extern IntPtr
            SetClipboardViewer(IntPtr hWndNewViewer);

        [DllImport("User32.dll", CharSet=CharSet.Auto)]
        public static extern bool
            ChangeClipboardChain(IntPtr hWndRemove,
            IntPtr hWndNewNext);

        [DllImport("user32.dll", CharSet=CharSet.Auto)]
        public static extern int SendMessage(IntPtr hwnd, int wMsg,
            IntPtr wParam,
            IntPtr lParam);
    }
}