Enable Aero style on Windows 10.

Program.cs

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

/// <summary>
/// Enable Aero style on Windows 10. 
/// Refrences: 
/// https://gist.github.com/ysc3839/b08d2bff1c7dacde529bed1d37e85ccf,
/// https://gist.github.com/riverar/fd6525579d6bbafc6e48,
/// https://www.kechuang.org/t/79675 
/// http://msdn.microsoft.com/en-us/library/ms748975.aspx
/// http://www.codeproject.com/KB/vista/AeroGlassForms.aspx
/// StackOverflow
/// Don't ask me ANY questions about this because I do NOT understand C#, lol.
/// </summary>
namespace AeroDemo
{
    class MainForm : Form
    {
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new MainForm());
        }

        public MainForm()
        {
            // this.ShowIcon = false;
            // SetStyle(ControlStyles.SupportsTransparentBackColor, true);
            this.BackColor = Color.Black;
            // this.TransparencyKey = Color.LimeGreen;
            this.MaximizeBox = false;
            this.FormBorderStyle = FormBorderStyle.FixedDialog;
        }

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
            MARGINS margins = new MARGINS();
            margins.Top = Height;
            margins.Left = Left;
            Console.WriteLine("SetAero: 7 = {0}, 10 = {1}", 
                DllHelper.SetAero7(this.Handle, margins),
                DllHelper.SetAero10(this.Handle));
        }
    }

    public static class DllHelper
    {
        [DllImport("user32.dll")]
        internal static extern int SetWindowCompositionAttribute(IntPtr hwnd, ref WindowCompositionAttributeData data);

        [DllImport("DwmApi.dll")]
        public static extern int DwmExtendFrameIntoClientArea(IntPtr hwnd, ref MARGINS pMarInset);

        public static int SetAero10(IntPtr hwnd)
        {
            AccentPolicy accentPolicy = new AccentPolicy
            {
                AccentState = AccentState.ACCENT_ENABLE_BLURBEHIND,
                AccentFlags = 0,
                GradientColor = 0,
                AnimationId = 0
            };
            WindowCompositionAttributeData data = new WindowCompositionAttributeData
            {
                Attribute = WindowCompositionAttribute.WCA_ACCENT_POLICY
            };
            int accentSize = Marshal.SizeOf(accentPolicy);
            IntPtr accentPtr = Marshal.AllocHGlobal(accentSize);
            Marshal.StructureToPtr(accentPolicy, accentPtr, false);
            data.Data = accentPtr;
            data.SizeOfData = accentSize;
            int result = SetWindowCompositionAttribute(hwnd, ref data);
            Marshal.FreeHGlobal(accentPtr);
            return result;
        }

        public static int SetAero7(IntPtr mainWindowPtr, MARGINS margins)
        {
            return DwmExtendFrameIntoClientArea(mainWindowPtr, ref margins);
        }
    }

    [StructLayout(LayoutKind.Sequential)]
    internal struct WindowCompositionAttributeData
    {
        public WindowCompositionAttribute Attribute;
        public IntPtr Data;
        public int SizeOfData;
    }

    internal enum WindowCompositionAttribute
    {
        WCA_UNDEFINED = 0,
        WCA_NCRENDERING_ENABLED = 1,
        WCA_NCRENDERING_POLICY = 2,
        WCA_TRANSITIONS_FORCEDISABLED = 3,
        WCA_ALLOW_NCPAINT = 4,
        WCA_CAPTION_BUTTON_BOUNDS = 5,
        WCA_NONCLIENT_RTL_LAYOUT = 6,
        WCA_FORCE_ICONIC_REPRESENTATION = 7,
        WCA_EXTENDED_FRAME_BOUNDS = 8,
        WCA_HAS_ICONIC_BITMAP = 9,
        WCA_THEME_ATTRIBUTES = 10,
        WCA_NCRENDERING_EXILED = 11,
        WCA_NCADORNMENTINFO = 12,
        WCA_EXCLUDED_FROM_LIVEPREVIEW = 13,
        WCA_VIDEO_OVERLAY_ACTIVE = 14,
        WCA_FORCE_ACTIVEWINDOW_APPEARANCE = 15,
        WCA_DISALLOW_PEEK = 16,
        WCA_CLOAK = 17,
        WCA_CLOAKED = 18,
        WCA_ACCENT_POLICY = 19,
        WCA_FREEZE_REPRESENTATION = 20,
        WCA_EVER_UNCLOAKED = 21,
        WCA_VISUAL_OWNER = 22,
        WCA_HOLOGRAPHIC = 23,
        WCA_EXCLUDED_FROM_DDA = 24,
        WCA_PASSIVEUPDATEMODE = 25,
        WCA_LAST = 26
    }

    internal enum AccentState
    {
        ACCENT_DISABLED = 0,
        ACCENT_ENABLE_GRADIENT = 1,
        ACCENT_ENABLE_TRANSPARENTGRADIENT = 2,
        ACCENT_ENABLE_BLURBEHIND = 3,
        ACCENT_ENABLE_ACRYLICBLURBEHIND = 4, // RS4 1803
        ACCENT_ENABLE_HOSTBACKDROP = 5, // RS5 1809
        ACCENT_INVALID_STATE = 6
    }

    [StructLayout(LayoutKind.Sequential)]
    internal struct AccentPolicy
    {
        public AccentState AccentState;
        public int AccentFlags;
        public int GradientColor;
        public int AnimationId;
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct MARGINS
    {
        public int Left;
        public int Right;
        public int Top;
        public int Bottom;
    }
}