MyDownloader: A Multi-thread C# Segmented Download Manager

//	This file is a part of the Command Prompt Explorer Bar project.
// 
//	Copyright Pavel Zolnikov, 2002
//
//			declarations of some COM interfaces and structues
// http://www.codeproject.com/KB/shell/dotnetbandobjects.aspx

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

namespace BandObjectLib
{

    abstract class ExplorerGUIDs
    {
        public static readonly Guid IID_IWebBrowserApp = new Guid("{0002DF05-0000-0000-C000-000000000046}");
        public static readonly Guid IID_IUnknown = new Guid("{00000000-0000-0000-C000-000000000046}");
    }



    [Flags]
    public enum DBIM : uint
    {
        MINSIZE = 0x0001,
        MAXSIZE = 0x0002,
        INTEGRAL = 0x0004,
        ACTUAL = 0x0008,
        TITLE = 0x0010,
        MODEFLAGS = 0x0020,
        BKCOLOR = 0x0040
    }


    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct DESKBANDINFO
    {
        public UInt32 dwMask;
        public Point ptMinSize;
        public Point ptMaxSize;
        public Point ptIntegral;
        public Point ptActual;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 255)]
        public String wszTitle;
        public DBIM dwModeFlags;
        public Int32 crBkgnd;
    };

    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("FC4801A3-2BA9-11CF-A229-00AA003D7352")]
    public interface IObjectWithSite
    {
        void SetSite([In, MarshalAs(UnmanagedType.IUnknown)] Object pUnkSite);
        void GetSite(ref Guid riid, [MarshalAs(UnmanagedType.IUnknown)] out Object ppvSite);
    }

    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("00000114-0000-0000-C000-000000000046")]
    public interface IOleWindow
    {
        void GetWindow(out System.IntPtr phwnd);
        void ContextSensitiveHelp([In] bool fEnterMode);
    }

    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("012dd920-7b26-11d0-8ca9-00a0c92dbfe8")]
    public interface IDockingWindow
    {
        void GetWindow(out System.IntPtr phwnd);
        void ContextSensitiveHelp([In] bool fEnterMode);

        void ShowDW([In] bool fShow);
        void CloseDW([In] UInt32 dwReserved);
        void ResizeBorderDW(
            IntPtr prcBorder,
            [In, MarshalAs(UnmanagedType.IUnknown)] Object punkToolbarSite,
            bool fReserved);
    }


    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("EB0FE172-1A3A-11D0-89B3-00A0C90A90AC")]
    public interface IDeskBand
    {
        void GetWindow(out System.IntPtr phwnd);
        void ContextSensitiveHelp([In] bool fEnterMode);

        void ShowDW([In] bool fShow);
        void CloseDW([In] UInt32 dwReserved);

        void ResizeBorderDW(
            IntPtr prcBorder,
            [In, MarshalAs(UnmanagedType.IUnknown)] Object punkToolbarSite,
            bool fReserved);

        void GetBandInfo(
            UInt32 dwBandID,
            UInt32 dwViewMode,
            ref DESKBANDINFO pdbi);
    }


    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("0000010c-0000-0000-C000-000000000046")]
    public interface IPersist
    {
        void GetClassID(out Guid pClassID);
    }


    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("00000109-0000-0000-C000-000000000046")]
    public interface IPersistStream
    {
        void GetClassID(out Guid pClassID);

        void IsDirty();

        void Load([In, MarshalAs(UnmanagedType.Interface)] Object pStm);

        void Save([In, MarshalAs(UnmanagedType.Interface)] Object pStm,
           [In] bool fClearDirty);

        void GetSizeMax([Out] out UInt64 pcbSize);
    }


    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("6d5140c1-7436-11ce-8034-00aa006009fa")]
    public interface _IServiceProvider
    {
        void QueryService(
            ref Guid guid,
            ref Guid riid,
            [MarshalAs(UnmanagedType.Interface)] out Object Obj);
    }


    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("68284faa-6a48-11d0-8c78-00c04fd918b4")]
    public interface IInputObject
    {
        void UIActivateIO(Int32 fActivate, ref MSG msg);

        [PreserveSig]
        //[return:MarshalAs(UnmanagedType.Error)]
        Int32 HasFocusIO();

        [PreserveSig]
        Int32 TranslateAcceleratorIO(ref MSG msg);
    }

    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("f1db8392-7331-11d0-8c99-00a0c92dbfe8")]
    public interface IInputObjectSite
    {
        [PreserveSig]
        Int32 OnFocusChangeIS([MarshalAs(UnmanagedType.IUnknown)] Object punkObj, Int32 fSetFocus);
    }

    public struct POINT
    {
        public Int32 x;
        public Int32 y;
    }

    public struct MSG
    {
        public IntPtr hwnd;
        public UInt32 message;
        public UInt32 wParam;
        public Int32 lParam;
        public UInt32 time;
        public POINT pt;
    }

}