using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Diagnostics;

namespace testWinForms87
{
  class CTestClipboard
  {
      [DllImport("user32.dll", SetLastError = true)]
      private static extern IntPtr GetOpenClipboardWindow();

      [DllImport("user32.dll", SetLastError = true)]
      private static extern uint GetWindowThreadProcessId(
          IntPtr hWnd,
          out uint lpdwProcessId);

      public static void TrySetData()
      {
          try
          {
              Clipboard.SetData(DataFormats.Text, "وحید");
          }
          catch
          {
              IntPtr hwnd = GetOpenClipboardWindow();
              if (hwnd == IntPtr.Zero) return;
              uint pid;
              GetWindowThreadProcessId(hwnd, out pid);
              MessageBox.Show(string.Format("clipboard is locked by: {0}",
                              Process.GetProcessById((int)pid).Modules[0].FileName));
          }
      }
  }
}