The simplest way is to activate KeyPreview in the form and then follow the logic in KeyDown event.

But an other approach can be useful:
If you have in your win application a menu (by e.g. &Edit => Copy (Paste)).

Enable for that menus the keyboard shortcuts

// 
// editToolStripMenuItem
// 
this.editToolStripMenuItem.DropDownItems.AddRange(new 
System.Windows.Forms.ToolStripItem[] {
this.copyToolStripMenuItem,
this.pasteToolStripMenuItem});
this.editToolStripMenuItem.Text = "Edit";
// 
// copyToolStripMenuItem
// 
**this.copyToolStripMenuItem.ShortcutKeys = ((System.Windows.Forms.Keys)
((System.Windows.Forms.Keys.Control | System.Windows.Forms.Keys.C)));**
this.copyToolStripMenuItem.Text = "&Copy";
// 
// pasteToolStripMenuItem
// 
**this.pasteToolStripMenuItem.ShortcutKeys = ((System.Windows.Forms.Keys)
((System.Windows.Forms.Keys.Control | System.Windows.Forms.Keys.V)));**
this.pasteToolStripMenuItem.Text = "&Paste";

So you have your shortcuts to Copy paste. Now manage just your menu clicks

private void copyToolStripMenuItem_Click(object sender, EventArgs e)
{
    Image myData = this.ActiveControl.BackgroundImage;
    Clipboard.SetImage(myData);
}

private void pasteToolStripMenuItem_Click(object sender, EventArgs e)
{
    Image myData = Clipboard.GetImage();
    this.ActiveControl.BackgroundImage = myData;
}

Surely, you can make invisible your menu, if you want do not show it to the user.

=============================================================================== UPDATE

code for multiple controls:

    private void copyToolStripMenuItem_Click(object sender, EventArgs e)
    {
        ICopyPasteable control = sender as ICopyPasteable;
        if (control != null)
        {
            control.CopyToClipboard();
        }
    }

    private void pasteToolStripMenuItem_Click(object sender, EventArgs e)
    {
        ICopyPasteable control = sender as ICopyPasteable;
        if (control != null)
        {
            control.PasteFromClipboard();
        }
    }
}


public interface ICopyPasteable
{
    void CopyToClipboard();
    void PasteFromClipboard();
}

public class MyTextBox : TextBox, ICopyPasteable
{

    #region ICopyPasteable Membres

    public void CopyToClipboard()
    {
        Clipboard.SetText(this.Text);
    }

    public void PasteFromClipboard()
    {
        if (Clipboard.ContainsText())
        {
            this.Text = Clipboard.GetText();
        }
    }

    #endregion
}

To find the focussed control: ContainerControl.ActiveControl. Then depending on the type of control, you can set a value (with the clipboard value).

The KeyUp event solved my problem! Events KeyDown and KeyPress didn t catch Ctrl + C for copy!

From Stack Overflow question Catching Ctrl + C in a textbox:

private void txtConsole_KeyUp(object sender, KeyEventArgs e)
{
    if (e.KeyData == (Keys.C | Keys.Control))
    {
        _consolePort.Write(new byte[] { 3 }, 0, 1);
        e.Handled = true;
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace notep
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {

        }

        private void b1_Click(object sender, RoutedEventArgs e)//copy
        {
            Clipboard.SetText(richTextBox1.Selection.Text);
            richTextBox1.Selection.Text = string.Empty;

        }

        private void b2_Click(object sender, RoutedEventArgs e)//cut
        {
            Clipboard.SetText(richTextBox1.Selection.Text);
        }

        private void b3_Click(object sender, RoutedEventArgs e)
        {

         richTextBox1.Selection.Text =richTextBox1.Selection.Text + Clipboard.GetText();//paste
        }
    }
}