Zip/Unzip using the java.util.zip .NET namespace and more

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Win32;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace CPZipStripper
{
    class Splash : NativeWindow, IDisposable
    {
        static Splash _instance;
        public static void CreateSplash(IWin32Window wnd)
        {
            if (_instance == null)
                _instance = new Splash(wnd); 
        }
        public static void DestroySplash()
        {
            if (_instance != null)
                ((IDisposable)_instance).Dispose();
        }
        public static void SetSplash(string status, int interval)
        {
            if (_instance != null)
                _instance.Waiting(status,interval);
        }

        #region USER32

        [DllImport("user32.dll")]
        internal static extern IntPtr CreateWindowEx(
           WindowExtendedStyles dwExStyle, string lpClassName, string lpWindowName, WindowStyles dwStyle, int x, int y,
           int nWidth, int nHeight, IntPtr hWndParent, IntPtr hMenu, IntPtr hInstance, IntPtr lpParam);

        [DllImport("user32.dll")]
        internal static extern bool IsWindow(IntPtr hWnd);

        [DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        internal static extern bool InvalidateRect(IntPtr hWnd, ref RECT rct, [MarshalAs(UnmanagedType.Bool)]bool bErase);

        [DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        internal static extern bool UpdateWindow(IntPtr hWnd);

        [DllImport("gdi32.dll")]
        internal static extern IntPtr CreateSolidBrush(uint crColor);

        [DllImport("gdi32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        internal static extern bool DeleteObject(IntPtr hObject);

        [DllImport("user32.dll")]
        internal static extern int FillRect(IntPtr hDC, [In] ref RECT lprc, IntPtr hbr);

        [DllImport("gdi32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        internal static extern bool TextOut(IntPtr hdc, int nXStart, int nYStart,
           string lpString, int cbString);

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1060:MovePInvokesToNativeMethodsClass"), DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        internal static extern bool EndPaint(IntPtr hWnd, [In] ref PAINTSTRUCT lpPaint);

        [DllImport("user32.dll")]
        internal static extern IntPtr BeginPaint(IntPtr hwnd, out PAINTSTRUCT lpPaint);

        [DllImport("user32.dll", ExactSpelling = true)]
        internal static extern IntPtr SetTimer(IntPtr hWnd, IntPtr nIDEvent, uint uElapse, TimerProcCallBack lpTimerFunc);
        [DllImport("user32.dll", ExactSpelling = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        internal static extern bool KillTimer(IntPtr hWnd, IntPtr uIDEvent);

        // or alternatively
        [DllImport("user32.dll", ExactSpelling = true)]
        static extern IntPtr SetTimer(IntPtr hWnd, IntPtr nIDEvent, uint uElapse, IntPtr lpTimerFunc);

        [DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        internal static extern bool GetClientRect(IntPtr hwnd, out RECT rect);

        public delegate void TimerProcCallBack(IntPtr hWnd, uint uMsg, IntPtr nIDEvent, uint dwTime);
        #endregion

        #region structs

        #region Windows Messages

        internal enum Msg
        {
            WM_NULL = 0x0000,
            WM_CREATE = 0x0001,
            WM_DESTROY = 0x0002,
            WM_MOVE = 0x0003,
            WM_SIZE = 0x0005,
            WM_ACTIVATE = 0x0006,
            WM_SETFOCUS = 0x0007,
            WM_KILLFOCUS = 0x0008,
            WM_ENABLE = 0x000A,
            WM_SETREDRAW = 0x000B,
            WM_SETTEXT = 0x000C,
            WM_GETTEXT = 0x000D,
            WM_GETTEXTLENGTH = 0x000E,
            WM_PAINT = 0x000F,
            WM_CLOSE = 0x0010,
            WM_QUERYENDSESSION = 0x0011,
            WM_QUIT = 0x0012,
            WM_QUERYOPEN = 0x0013,
            WM_ERASEBKGND = 0x0014,
            WM_SYSCOLORCHANGE = 0x0015,
            WM_ENDSESSION = 0x0016,
            WM_SHOWWINDOW = 0x0018,
            WM_CTLCOLOR = 0x0019,
            WM_WININICHANGE = 0x001A,
            WM_SETTINGCHANGE = 0x001A,
            WM_DEVMODECHANGE = 0x001B,
            WM_ACTIVATEAPP = 0x001C,
            WM_FONTCHANGE = 0x001D,
            WM_TIMECHANGE = 0x001E,
            WM_CANCELMODE = 0x001F,
            WM_SETCURSOR = 0x0020,
            WM_MOUSEACTIVATE = 0x0021,
            WM_CHILDACTIVATE = 0x0022,
            WM_QUEUESYNC = 0x0023,
            WM_GETMINMAXINFO = 0x0024,
            WM_PAINTICON = 0x0026,
            WM_ICONERASEBKGND = 0x0027,
            WM_NEXTDLGCTL = 0x0028,
            WM_SPOOLERSTATUS = 0x002A,
            WM_DRAWITEM = 0x002B,
            WM_MEASUREITEM = 0x002C,
            WM_DELETEITEM = 0x002D,
            WM_VKEYTOITEM = 0x002E,
            WM_CHARTOITEM = 0x002F,
            WM_SETFONT = 0x0030,
            WM_GETFONT = 0x0031,
            WM_SETHOTKEY = 0x0032,
            WM_GETHOTKEY = 0x0033,
            WM_QUERYDRAGICON = 0x0037,
            WM_COMPAREITEM = 0x0039,
            WM_GETOBJECT = 0x003D,
            WM_COMPACTING = 0x0041,
            WM_COMMNOTIFY = 0x0044,
            WM_WINDOWPOSCHANGING = 0x0046,
            WM_WINDOWPOSCHANGED = 0x0047,
            WM_POWER = 0x0048,
            WM_COPYDATA = 0x004A,
            WM_CANCELJOURNAL = 0x004B,
            WM_NOTIFY = 0x004E,
            WM_INPUTLANGCHANGEREQUEST = 0x0050,
            WM_INPUTLANGCHANGE = 0x0051,
            WM_TCARD = 0x0052,
            WM_HELP = 0x0053,
            WM_USERCHANGED = 0x0054,
            WM_NOTIFYFORMAT = 0x0055,
            WM_CONTEXTMENU = 0x007B,
            WM_STYLECHANGING = 0x007C,
            WM_STYLECHANGED = 0x007D,
            WM_DISPLAYCHANGE = 0x007E,
            WM_GETICON = 0x007F,
            WM_SETICON = 0x0080,
            WM_NCCREATE = 0x0081,
            WM_NCDESTROY = 0x0082,
            WM_NCCALCSIZE = 0x0083,
            WM_NCHITTEST = 0x0084,
            WM_NCPAINT = 0x0085,
            WM_NCACTIVATE = 0x0086,
            WM_GETDLGCODE = 0x0087,
            WM_SYNCPAINT = 0x0088,
            WM_NCMOUSEMOVE = 0x00A0,
            WM_NCLBUTTONDOWN = 0x00A1,
            WM_NCLBUTTONUP = 0x00A2,
            WM_NCLBUTTONDBLCLK = 0x00A3,
            WM_NCRBUTTONDOWN = 0x00A4,
            WM_NCRBUTTONUP = 0x00A5,
            WM_NCRBUTTONDBLCLK = 0x00A6,
            WM_NCMBUTTONDOWN = 0x00A7,
            WM_NCMBUTTONUP = 0x00A8,
            WM_NCMBUTTONDBLCLK = 0x00A9,
            WM_NCXBUTTONDOWN = 0x00AB,
            WM_NCXBUTTONUP = 0x00AC,
            WM_NCXBUTTONDBLCLK = 0x00AD,
            WM_KEYDOWN = 0x0100,
            WM_KEYUP = 0x0101,
            WM_CHAR = 0x0102,
            WM_DEADCHAR = 0x0103,
            WM_SYSKEYDOWN = 0x0104,
            WM_SYSKEYUP = 0x0105,
            WM_SYSCHAR = 0x0106,
            WM_SYSDEADCHAR = 0x0107,
            WM_KEYLAST = 0x0108,
            WM_IME_STARTCOMPOSITION = 0x010D,
            WM_IME_ENDCOMPOSITION = 0x010E,
            WM_IME_COMPOSITION = 0x010F,
            WM_IME_KEYLAST = 0x010F,
            WM_INITDIALOG = 0x0110,
            WM_COMMAND = 0x0111,
            WM_SYSCOMMAND = 0x0112,
            WM_TIMER = 0x0113,
            WM_HSCROLL = 0x0114,
            WM_VSCROLL = 0x0115,
            WM_INITMENU = 0x0116,
            WM_INITMENUPOPUP = 0x0117,
            WM_MENUSELECT = 0x011F,
            WM_MENUCHAR = 0x0120,
            WM_ENTERIDLE = 0x0121,
            WM_MENURBUTTONUP = 0x0122,
            WM_MENUDRAG = 0x0123,
            WM_MENUGETOBJECT = 0x0124,
            WM_UNINITMENUPOPUP = 0x0125,
            WM_MENUCOMMAND = 0x0126,
            WM_CTLCOLORMSGBOX = 0x0132,
            WM_CTLCOLOREDIT = 0x0133,
            WM_CTLCOLORLISTBOX = 0x0134,
            WM_CTLCOLORBTN = 0x0135,
            WM_CTLCOLORDLG = 0x0136,
            WM_CTLCOLORSCROLLBAR = 0x0137,
            WM_CTLCOLORSTATIC = 0x0138,
            WM_MOUSEMOVE = 0x0200,
            WM_LBUTTONDOWN = 0x0201,
            WM_LBUTTONUP = 0x0202,
            WM_LBUTTONDBLCLK = 0x0203,
            WM_RBUTTONDOWN = 0x0204,
            WM_RBUTTONUP = 0x0205,
            WM_RBUTTONDBLCLK = 0x0206,
            WM_MBUTTONDOWN = 0x0207,
            WM_MBUTTONUP = 0x0208,
            WM_MBUTTONDBLCLK = 0x0209,
            WM_MOUSEWHEEL = 0x020A,
            WM_XBUTTONDOWN = 0x020B,
            WM_XBUTTONUP = 0x020C,
            WM_XBUTTONDBLCLK = 0x020D,
            WM_PARENTNOTIFY = 0x0210,
            WM_ENTERMENULOOP = 0x0211,
            WM_EXITMENULOOP = 0x0212,
            WM_NEXTMENU = 0x0213,
            WM_SIZING = 0x0214,
            WM_CAPTURECHANGED = 0x0215,
            WM_MOVING = 0x0216,
            WM_DEVICECHANGE = 0x0219,
            WM_MDICREATE = 0x0220,
            WM_MDIDESTROY = 0x0221,
            WM_MDIACTIVATE = 0x0222,
            WM_MDIRESTORE = 0x0223,
            WM_MDINEXT = 0x0224,
            WM_MDIMAXIMIZE = 0x0225,
            WM_MDITILE = 0x0226,
            WM_MDICASCADE = 0x0227,
            WM_MDIICONARRANGE = 0x0228,
            WM_MDIGETACTIVE = 0x0229,
            WM_MDISETMENU = 0x0230,
            WM_ENTERSIZEMOVE = 0x0231,
            WM_EXITSIZEMOVE = 0x0232,
            WM_DROPFILES = 0x0233,
            WM_MDIREFRESHMENU = 0x0234,
            WM_IME_SETCONTEXT = 0x0281,
            WM_IME_NOTIFY = 0x0282,
            WM_IME_CONTROL = 0x0283,
            WM_IME_COMPOSITIONFULL = 0x0284,
            WM_IME_SELECT = 0x0285,
            WM_IME_CHAR = 0x0286,
            WM_IME_REQUEST = 0x0288,
            WM_IME_KEYDOWN = 0x0290,
            WM_IME_KEYUP = 0x0291,
            WM_MOUSEHOVER = 0x02A1,
            WM_MOUSELEAVE = 0x02A3,
            WM_CUT = 0x0300,
            WM_COPY = 0x0301,
            WM_PASTE = 0x0302,
            WM_CLEAR = 0x0303,
            WM_UNDO = 0x0304,
            WM_RENDERFORMAT = 0x0305,
            WM_RENDERALLFORMATS = 0x0306,
            WM_DESTROYCLIPBOARD = 0x0307,
            WM_DRAWCLIPBOARD = 0x0308,
            WM_PAINTCLIPBOARD = 0x0309,
            WM_VSCROLLCLIPBOARD = 0x030A,
            WM_SIZECLIPBOARD = 0x030B,
            WM_ASKCBFORMATNAME = 0x030C,
            WM_CHANGECBCHAIN = 0x030D,
            WM_HSCROLLCLIPBOARD = 0x030E,
            WM_QUERYNEWPALETTE = 0x030F,
            WM_PALETTEISCHANGING = 0x0310,
            WM_PALETTECHANGED = 0x0311,
            WM_HOTKEY = 0x0312,
            WM_PRINT = 0x0317,
            WM_PRINTCLIENT = 0x0318,
            WM_THEME_CHANGED = 0x031A,
            WM_HANDHELDFIRST = 0x0358,
            WM_HANDHELDLAST = 0x035F,
            WM_AFXFIRST = 0x0360,
            WM_AFXLAST = 0x037F,
            WM_PENWINFIRST = 0x0380,
            WM_PENWINLAST = 0x038F,
            WM_APP = 0x8000,
            WM_USER = 0x0400,
            WM_REFLECT = WM_USER + 0x1c00
        }
        #endregion

        [StructLayout(LayoutKind.Sequential)]
        internal struct PAINTSTRUCT
        {
            public IntPtr hdc;
            public bool fErase;
            public RECT rcPaint;
            public bool fRestore;
            public bool fIncUpdate;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
            public byte[] rgbReserved;
        }

        [StructLayout(LayoutKind.Sequential)]
        internal struct RECT
        {
            public int left;
            public int top;
            public int right;
            public int bottom;

            #region Properties

            public POINT Location
            {
                get { return new POINT((int)left, (int)top); }
                set
                {
                    right -= (left - value.x);
                    bottom -= (bottom - value.y);
                    left = value.x;
                    top = value.y;
                }
            }

            #endregion

            #region Overrides
            public override string ToString()
            {
                return left + ":" + top + ":" + right + ":" + bottom;
            }
            #endregion
        }

        #region POINT

        [StructLayout(LayoutKind.Sequential)]
        internal struct POINT
        {
            public int x;
            public int y;

            #region Constructors
            public POINT(int x, int y)
            {
                this.x = x;
                this.y = y;
            }

            public POINT(System.Drawing.Point point)
            {
                x = point.X;
                y = point.Y;
            }
            #endregion
        }
        #endregion

        #region Window Styles

        [Flags]
        public enum WindowStyles : uint
        {
            WS_OVERLAPPED = 0x00000000,
            WS_POPUP = 0x80000000,
            WS_CHILD = 0x40000000,
            WS_MINIMIZE = 0x20000000,
            WS_VISIBLE = 0x10000000,
            WS_DISABLED = 0x08000000,
            WS_CLIPSIBLINGS = 0x04000000,
            WS_CLIPCHILDREN = 0x02000000,
            WS_MAXIMIZE = 0x01000000,
            WS_CAPTION = 0x00C00000,
            WS_BORDER = 0x00800000,
            WS_DLGFRAME = 0x00400000,
            WS_VSCROLL = 0x00200000,
            WS_HSCROLL = 0x00100000,
            WS_SYSMENU = 0x00080000,
            WS_THICKFRAME = 0x00040000,
            WS_GROUP = 0x00020000,
            WS_TABSTOP = 0x00010000,
            WS_MINIMIZEBOX = 0x00020000,
            WS_MAXIMIZEBOX = 0x00010000,
            WS_TILED = 0x00000000,
            WS_ICONIC = 0x20000000,
            WS_SIZEBOX = 0x00040000,
            WS_POPUPWINDOW = 0x80880000,
            WS_OVERLAPPEDWINDOW = 0x00CF0000,
            WS_TILEDWINDOW = 0x00CF0000,
            WS_CHILDWINDOW = 0x40000000
        }
        #endregion

        #region Window Extended Styles

        [Flags]
        public enum WindowExtendedStyles
        {
            WS_EX_DLGMODALFRAME = 0x00000001,
            WS_EX_NOPARENTNOTIFY = 0x00000004,
            WS_EX_TOPMOST = 0x00000008,
            WS_EX_ACCEPTFILES = 0x00000010,
            WS_EX_TRANSPARENT = 0x00000020,
            WS_EX_MDICHILD = 0x00000040,
            WS_EX_TOOLWINDOW = 0x00000080,
            WS_EX_WINDOWEDGE = 0x00000100,
            WS_EX_CLIENTEDGE = 0x00000200,
            WS_EX_CONTEXTHELP = 0x00000400,
            WS_EX_RIGHT = 0x00001000,
            WS_EX_LEFT = 0x00000000,
            WS_EX_RTLREADING = 0x00002000,
            WS_EX_LTRREADING = 0x00000000,
            WS_EX_LEFTSCROLLBAR = 0x00004000,
            WS_EX_RIGHTSCROLLBAR = 0x00000000,
            WS_EX_CONTROLPARENT = 0x00010000,
            WS_EX_STATICEDGE = 0x00020000,
            WS_EX_APPWINDOW = 0x00040000,
            WS_EX_OVERLAPPEDWINDOW = 0x00000300,
            WS_EX_PALETTEWINDOW = 0x00000188,
            WS_EX_LAYERED = 0x00080000
        }
        #endregion
        #endregion

        #region datamembers
        string _strmsg = "wait";
        uint _tick = 500;

        public uint Tick
        {
            set { _tick = value; }
        }


        uint _count;
        GCHandle _gch;//needed because of the unmanaged calls

        TimerProcCallBack _callback;
        #endregion
        # region methods

        void Waiting(string status, int interval)
        {
            _strmsg = status;
            _tick = (uint)interval;
            _callback = new TimerProcCallBack(this.TimerProc);
           SetTimer(this.Handle, (IntPtr)1, _tick, _callback);
        }
        void TimerProc(IntPtr hWnd, uint uMsg, IntPtr nIDEvent, uint dwTime)
        {
            _count = ++_count % 20;

            if (_count == 0)
                _strmsg = _strmsg.TrimEnd('.');

            StringBuilder sb = new StringBuilder(_strmsg, 50);
            for (int i = 0; i < _count; i++)
            {
                sb.Append('.');
                _strmsg = sb.ToString();

            }
            sb.Length = 0;
            Splash.RECT ClientRect;
            GetClientRect(Handle, out ClientRect);
            InvalidateRect(Handle, ref ClientRect, false);

        }
        Splash(IWin32Window wnd)
        {
            _gch = GCHandle.Alloc(this);

            AssignHandle(CreateWindowEx((WindowExtendedStyles.WS_EX_TOPMOST | WindowExtendedStyles.WS_EX_CONTROLPARENT),
                "Message", null,
                (WindowStyles.WS_VISIBLE | WindowStyles.WS_BORDER | WindowStyles.WS_POPUP),
                300, 200, 600, 70, wnd.Handle, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero));
            _instance = this;
        }

        protected override void WndProc(ref Message m)
        {
            switch (m.Msg)
            {
                case (int)Msg.WM_DESTROY:
                    KillTimer(Handle, (IntPtr)1);
                    Splash.DestroySplash();
                    break;
                case (int)Msg.WM_PAINT:
                    {
                        PAINTSTRUCT ps;
                        IntPtr hdc = BeginPaint(Handle, out ps);
                        IntPtr brush = CreateSolidBrush(0x00ffffff); // black, of format : //0x00bbggrr 
                        try
                        {
                            RECT ClientRect;
                            GetClientRect(Handle, out ClientRect);
                            FillRect(hdc, ref ClientRect, brush);
                            TextOut(hdc, 0, 0, _strmsg, _strmsg.Length);
                        }
                        finally
                        {
                            DeleteObject(brush);
                            EndPaint(Handle, ref ps);
                        }
                    }
                    break;
                default:
                    break;

            }
            base.WndProc(ref m);
        }
        #endregion

        #region IDisposable Members

        void IDisposable.Dispose()
        {
            if (IsWindow(Handle))
            {
                DestroyHandle();
                _instance = null;
                if(_gch.IsAllocated)
                    _gch.Free();
            }
        }

        #endregion
    }
}