Network Utility Tools

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

namespace NetworkUtilityTools
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        //Color colorBackgroundDark = Color.FromArgb(255, 32, 32, 32);
        Color colorBackgroundDark = Color.FromArgb(255, 39, 39, 39);
        //Color colorBackgroundDark = Color.Blue;
        //Color colorBackgroundDark = SystemColors.ControlDarkDark;
        [Designer("System.Windows.Forms.Design.ParentControlDesigner, System.Design", typeof(System.ComponentModel.Design.IDesigner))]
        public partial class TabControlPaint : TabControl
        {
            public enum HRESULT : int
            {
                S_OK = 0,
                S_FALSE = 1,
                E_NOINTERFACE = unchecked((int)0x80004002),
                E_NOTIMPL = unchecked((int)0x80004001),
                E_FAIL = unchecked((int)0x80004005),
                E_UNEXPECTED = unchecked((int)0x8000FFFF),
                E_OUTOFMEMORY = unchecked((int)0x8007000E)
            }
            [DllImport("UxTheme.dll", SetLastError = true, CharSet = CharSet.Auto)]
            public static extern IntPtr BeginBufferedPaint(IntPtr hdcTarget, ref RECT prcTarget, BP_BUFFERFORMAT dwFormat, IntPtr pPaintParams, out IntPtr phdc);
            public enum BP_BUFFERFORMAT
            {
                BPBF_COMPATIBLEBITMAP,
                BPBF_DIB,
                BPBF_TOPDOWNDIB,
                BPBF_TOPDOWNMONODIB
            }
            [DllImport("UxTheme.dll", SetLastError = true, CharSet = CharSet.Auto)]
            public static extern HRESULT EndBufferedPaint(IntPtr hBufferedPaint, bool fUpdateTarget);
            [DllImport("UxTheme.dll", SetLastError = true, CharSet = CharSet.Auto)]
            public static extern HRESULT BufferedPaintInit();
            [DllImport("UxTheme.dll", SetLastError = true, CharSet = CharSet.Auto)]
            public static extern HRESULT BufferedPaintUnInit();
            [DllImport("User32.dll", SetLastError = true)]
            public static extern bool GetClientRect(IntPtr hWnd, out RECT lpRect);
            [StructLayout(LayoutKind.Sequential)]
            public struct RECT
            {
                public int left;
                public int top;
                public int right;
                public int bottom;
                public RECT(int Left, int Top, int Right, int Bottom)
                {
                    left = Left;
                    top = Top;
                    right = Right;
                    bottom = Bottom;
                }
            }
            [DllImport("Gdi32.dll", SetLastError = true, CharSet = CharSet.Auto)]
            public static extern IntPtr CreateCompatibleDC(IntPtr hDC);
            [DllImport("Gdi32.dll", SetLastError = true, CharSet = CharSet.Auto)]
            public static extern IntPtr CreateCompatibleBitmap(IntPtr hDC, int nWidth, int nHeight);
            [DllImport("Gdi32.dll", SetLastError = true, CharSet = CharSet.Auto)]
            public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObject);
            [DllImport("Gdi32.dll", SetLastError = true, CharSet = CharSet.Auto)]
            public static extern bool DeleteDC(IntPtr hDC);
            [DllImport("Gdi32.dll", SetLastError = true, CharSet = CharSet.Auto)]
            public static extern bool DeleteObject(IntPtr ho);
            [DllImport("Gdi32.dll", SetLastError = true, CharSet = CharSet.Auto)]
            public static extern IntPtr CreateSolidBrush(int crColor);
            [DllImport("Msimg32.dll", SetLastError = true)]
            public static extern bool TransparentBlt(IntPtr hdcDest, int xoriginDest, int yoriginDest, int wDest, int hDest, IntPtr hdcSrc, int xoriginSrc, int yoriginSrc, int wSrc, int hSrc, uint crTransparent);
            [DllImport("Gdi32.dll", SetLastError = true, CharSet = CharSet.Auto)]
            public static extern bool BitBlt(IntPtr hDC, int x, int y, int nWidth, int nHeight, IntPtr hSrcDC, int xSrc, int ySrc, int dwRop);
            public const int SRCCOPY = 0x00CC0020;
            [DllImport("User32.dll", SetLastError = true, CharSet = CharSet.Auto)]
            public static extern bool FillRect(IntPtr hdc, [In] ref RECT rect, IntPtr hbrush);
            [DllImport("User32.dll", SetLastError = true, CharSet = CharSet.Auto)]
            public static extern int SendMessage(IntPtr hWnd, uint msg, int wParam, IntPtr lParam);
            public const int WM_PRINT = 0x0317;
            public const int WM_PRINTCLIENT = 0x0318;
            public const int PRF_CHECKVISIBLE = 0x00000001;
            public const int PRF_NONCLIENT = 0x00000002;
            public const int PRF_CLIENT = 0x00000004;
            public const int PRF_ERASEBKGND = 0x00000008;
            public const int PRF_CHILDREN = 0x00000010;
            public const int PRF_OWNED = 0x00000020;
            [DllImport("User32.dll", SetLastError = true, ExactSpelling = true, EntryPoint = "BeginPaint", CharSet = CharSet.Auto)]
            private static extern int BeginPaint(IntPtr hWnd, [In, Out] ref PAINTSTRUCT lpPaint);
            [DllImport("User32.dll", SetLastError = true, ExactSpelling = true, EntryPoint = "EndPaint", CharSet = CharSet.Auto)]
            private static extern bool EndPaint(IntPtr hWnd, ref PAINTSTRUCT lpPaint);
            [StructLayout(LayoutKind.Sequential)]
            public struct PAINTSTRUCT
            {
                public IntPtr hdc;
                public bool fErase;
                public int rcPaint_left;
                public int rcPaint_top;
                public int rcPaint_right;
                public int rcPaint_bottom;
                public bool fRestore;
                public bool fIncUpdate;
                public int reserved1;
                public int reserved2;
                public int reserved3;
                public int reserved4;
                public int reserved5;
                public int reserved6;
                public int reserved7;
                public int reserved8;
            }
            public const int WM_PAINT = 0x000F;
            public TabControlPaint()
            {
                BufferedPaintInit();
                //this.SetStyle(ControlStyles.UserPaint, true);
                this.DrawMode = TabDrawMode.OwnerDrawFixed;
                this.DrawItem += new System.Windows.Forms.DrawItemEventHandler(tabControl_DrawItem);
            }
            protected override void OnCreateControl()
            {
                base.OnCreateControl();
                ((Form)this.Parent).Closing += new CancelEventHandler(Parent_Closing);
                ((Form)this.Parent).Load += Parent_Load;
            }
            private void Parent_Load(object sender, EventArgs e)
            {
                foreach (TabPage tp in this.TabPages)
                {
                    tp.BackColor = Color.FromArgb(255, 39, 39, 39);
                }
            }
            private void Parent_Closing(object sender, CancelEventArgs e)
            {
                BufferedPaintUnInit();
            }
            private void tabControl_DrawItem(object sender, DrawItemEventArgs e)
            {
                TabControl tc = (TabControl)sender;
                TabPage tp = tc.TabPages[e.Index];
                SolidBrush backBrush = (e.State == DrawItemState.Selected) ? new SolidBrush(tp.BackColor) : new SolidBrush(Color.Black);
                e.Graphics.FillRectangle(backBrush, e.Bounds);
                Rectangle rectBounds = e.Bounds;
                int nYOffset = (e.State == DrawItemState.Selected) ? -1 : 1;
                rectBounds.Offset(1, nYOffset);
                Color textColor = (e.State == DrawItemState.Selected) ? Color.White : Color.LightGray;
                Color backColor = Color.FromArgb(255, 39, 39, 39);
                if (backColor == SystemColors.Control)
                    textColor = (e.State == DrawItemState.Selected) ? Color.Black : Color.LightGray;
                TextRenderer.DrawText(e.Graphics, tp.Text, e.Font, rectBounds, textColor);
            }
            protected override void WndProc(ref Message m)
            {
                if (m.Msg == WM_PAINT)
                {
                    PAINTSTRUCT ps = new PAINTSTRUCT();
                    IntPtr hDC = (IntPtr)BeginPaint(m.HWnd, ref ps);
                    IntPtr targetDC = hDC;
                    IntPtr bufferedDC = IntPtr.Zero;
                    HRESULT hr = HRESULT.S_OK;
                    RECT rectClient;
                    GetClientRect(this.Handle, out rectClient);
                    IntPtr pb = BeginBufferedPaint(targetDC, ref rectClient, BP_BUFFERFORMAT.BPBF_TOPDOWNDIB, IntPtr.Zero, out bufferedDC);
                    IntPtr hDCMem = CreateCompatibleDC(hDC);
                    IntPtr hBitmap = CreateCompatibleBitmap(hDC, rectClient.right - rectClient.left, rectClient.bottom - rectClient.top);
                    IntPtr hBitmapOld = SelectObject(hDCMem, hBitmap);
                    // Copie control image into Memory DC with custom color as background
                    IntPtr hBrush1 = CreateSolidBrush(ColorTranslator.ToWin32(Color.FromArgb(255, 255, 254, 255)));
                    FillRect(hDCMem, ref rectClient, hBrush1);
                    DeleteObject(hBrush1);
                    SendMessage(this.Handle, WM_PRINTCLIENT, (int)hDCMem, (IntPtr)PRF_CLIENT);
                    IntPtr hDCMem2 = CreateCompatibleDC(hDC);
                    IntPtr hBitmap2 = CreateCompatibleBitmap(hDC, rectClient.right - rectClient.left, rectClient.bottom - rectClient.top);
                    IntPtr hBitmapOld2 = SelectObject(hDCMem2, hBitmap2);
                    // Custom color => Back color
                    IntPtr hBrush2 = CreateSolidBrush(ColorTranslator.ToWin32(this.Parent.BackColor));
                    FillRect(hDCMem2, ref rectClient, hBrush2);
                    DeleteObject(hBrush2);
                    TransparentBlt(hDCMem2, 0, 0, rectClient.right - rectClient.left, rectClient.bottom - rectClient.top, hDCMem, 0, 0,
                        rectClient.right - rectClient.left, rectClient.bottom - rectClient.top, (uint)ColorTranslator.ToWin32(Color.FromArgb(255, 255, 254, 255)));
                    BitBlt(bufferedDC, 0, 0, rectClient.right - rectClient.left, rectClient.bottom - rectClient.top, hDCMem2, 0, 0, SRCCOPY);
                    SelectObject(hDCMem, hBitmapOld);
                    DeleteObject(hBitmap);
                    DeleteDC(hDCMem);
                    SelectObject(hDCMem2, hBitmapOld2);
                    DeleteObject(hBitmap2);
                    DeleteDC(hDCMem2);
                    hr = EndBufferedPaint(pb, true);
                    EndPaint(m.HWnd, ref ps);
                    m.Result = IntPtr.Zero;
                }
                else
                    base.WndProc(ref m);
            }
        }

        private void activate_dtheme(object sender, EventArgs e)
        {
            this.BackColor = Color.FromArgb(255, 39, 39, 39);
            tabPage1.BackColor = Color.FromArgb(255, 39, 39, 39);
        }
    }


}