Using screensavers inside the Windows Media Player

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace SheepWMP.NET
{
    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("695386EC-AA3C-4618-A5E1-DD9A8B987632")]
    public interface IWmpEffects2 : IWmpEffects
    {
        [PreserveSig]
        new int Render(ref TimedLevel pLevels, IntPtr Hdc, ref RECT pRC);
        [PreserveSig]
        new int MediaInfo(int lChannelCount, int lSampleRate, string bstrTitle);
        [PreserveSig]
        new int GetCapabilities(ref int pdwCapabilities);
        [PreserveSig]
        new int GetTitle(ref string bstrTitle);
        [PreserveSig]
        new int GetPresetTitle(int nPreset, ref string bstrPresetTitle);
        [PreserveSig]
        new int GetPresetCount(ref int count);
        [PreserveSig]
        new int SetCurrentPreset(int currentpreset);
        [PreserveSig]
        new int GetCurrentPreset(ref int currentpreset);
        [PreserveSig]
        new int DisplayPropertyPage(IntPtr hwndOwner);
        [PreserveSig]
        new int GoFullScreen(bool fFullscreen);
        [PreserveSig]
        new int RenderFullScreen(ref TimedLevel pLevels);

        [PreserveSig]
        int SetCore(IntPtr pPlayer);
        [PreserveSig]
        int Create(IntPtr hwndParent);
        [PreserveSig]
        int Destroy();
        [PreserveSig]
        int NotifyNewMedia(IntPtr pMedia);
        [PreserveSig]
        int OnWindowMessage(int Msg, int WParam, int LParam, ref int plResultParam);
        [PreserveSig]
        int RenderWindowed(ref TimedLevel pData, bool fRequiredRender);
    }

    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("D3984C13-C3CB-48e2-8BE5-5168340B4F35")]
    public interface IWmpEffects
    {
        [PreserveSig]
        int Render(ref TimedLevel pLevels, IntPtr Hdc, ref RECT pRC);
        [PreserveSig]
        int MediaInfo(int lChannelCount, int lSampleRate, string bstrTitle);
        [PreserveSig]
        int GetCapabilities(ref int pdwCapabilities);
        [PreserveSig]
        int GetTitle(ref string bstrTitle);
        [PreserveSig]
        int GetPresetTitle(int nPreset, ref string bstrPresetTitle);
        [PreserveSig]
        int GetPresetCount(ref int count);
        [PreserveSig]
        int SetCurrentPreset(int currentpreset);
        [PreserveSig]
        int GetCurrentPreset(ref int currentpreset);
        [PreserveSig]
        int DisplayPropertyPage(IntPtr hwndOwner);
        [PreserveSig]
        int GoFullScreen(bool fFullscreen);
        [PreserveSig]
        int RenderFullScreen(ref TimedLevel pLevels);
    }


    //[ComVisible(true)]
    [StructLayout(LayoutKind.Sequential)]
    public struct Data
    {
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x400)]
        public byte[] Data0;
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x400)]
        public byte[] Data1;
    }

    //[ComVisible(true)]
    public enum PlayerState
    {
        Stop_State,
        Pause_State,
        Play_State
    }

    //[ComVisible(true)]
    [StructLayout(LayoutKind.Sequential)]
    public struct TimedLevel
    {
        public Data Frequency;
        public Data Waveform;
        public PlayerState State;
        public long TimeStamp;
    }

    //[ComVisible(true)]
    [StructLayout(LayoutKind.Sequential)]
    public struct RECT
    {
        public int Left;
        public int Top;
        public int Right;
        public int Bottom;
        public int Width { get { return this.Right - this.Left; } }
        public int Height { get { return this.Bottom - this.Top; } }
    }
}