title: GetMessage() given an System.ExecutionEngineException
body: <pre><code>using System;
  using System.Collections.Generic;
  using System.ComponentModel;
  using System.Data;
  using System.Drawing;
  using System.Linq;
  using System.Text;
  using System.Windows.Forms;
  using System.Runtime.InteropServices;
  using System.Diagnostics;
  using System.Threading;
  
  namespace WindowsFormsApplication1
  {
      public partial class Form1 : Form
      {
          [DllImport("user32.dll")]
          public static extern
              bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, int vk);
          [DllImport("user32")]
          public static extern
              bool GetMessage(ref Message lpMsg, IntPtr handle, uint mMsgFilterInMain, uint mMsgFilterMax);
  
          public const int MOD_ALT = 0x0001;
          public const int MOD_CONTROL = 0x0002;
          public const int MOD_SHIFT = 0x004;
          public const int MOD_NOREPEAT = 0x400;
          public const int WM_HOTKEY = 0x312;
          public const int DSIX = 0x36;
  
          public Form1()
          {
              InitializeComponent();
          }
  
          private void Form1_Load(object sender, EventArgs e)
          {
              bool r = RegisterHotKey(Handle, 1, MOD_ALT, DSIX);
  
              if (!r)
              {
                  MessageBox.Show("can't do..");
                  return;
              }
  
              Message msg = new Message();
  
              while (GetMessage(ref msg,IntPtr.Zero, 0, 0))
              {
                  if (msg.message == WM_HOTKEY)
                  {
                      MessageBox.Show("do work..");
                  }
              }
  
  
          }
      }
  
  
      public class Message
      {
          public int message { get; set; }
      }
  }
  </code></pre>
  
  <p>when the target is pressed, I get the following error:</p>
  
  <pre><code>Exception of type 'System.ExecutionEngineException' was thrown.
  </code></pre>
  
  <p>what's is this? how to fix this? Thanks in advance.</p>