C# flash屏蔽右键

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

namespace FlashPlayer
public partialclass Form1 : Form
{
#region Disable Flash's Context Menu
private const int GWL_WNDPROC= -4;
public delegate IntPtr FlaWndProc(IntPtr hWnd,int msg, IntPtr wParam, IntPtr lParam);

private IntPtr OldWndProc= IntPtr.Zero;
private FlaWndProc Wpr= null;

[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern IntPtr SetWindowLong(IntPtr hWnd,int nIndex, FlaWndProc wndProc);
[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern IntPtr CallWindowProc(IntPtr wndProc, IntPtr hWnd,int msg, IntPtr wParam, IntPtr lParam);

private IntPtr FlashWndProc(IntPtr hWnd,int msg, IntPtr wParam, IntPtr lParam){
if(msg == 516)
return (IntPtr)0;
return CallWindowProc(OldWndProc, hWnd, msg, wParam, lParam);
}
#endregion

public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e) {
this.Wpr = new FlaWndProc(this.FlashWndProc);
this.OldWndProc= SetWindowLong(axShockwaveFlash1.Handle, GWL_WNDPROC, Wpr);
}
}
}