Native.cs

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

namespace EDVRHUD
{
    static class Native
    {
        public const int SRCCOPY = 13369376;

        [DllImport("user32.dll", EntryPoint = "GetDesktopWindow")]
        public static extern IntPtr GetDesktopWindow();

        [DllImport("user32.dll", EntryPoint = "GetDC")]
        public static extern IntPtr GetDC(IntPtr hwnd);

        [DllImport("gdi32.dll", EntryPoint = "CreateDC")]
        public static extern IntPtr CreateDC(IntPtr lpszDriver, string lpszDevice, IntPtr lpszOutput, IntPtr lpInitData);

        [DllImport("gdi32.dll", EntryPoint = "DeleteDC")]
        public static extern IntPtr DeleteDC(IntPtr hDc);

        [DllImport("gdi32.dll", EntryPoint = "DeleteObject")]
        public static extern IntPtr DeleteObject(IntPtr hDc);

        [DllImport("gdi32.dll", EntryPoint = "BitBlt")]
        public static extern bool BitBlt(IntPtr hdcDest, int xDest, int yDest, int wDest, int hDest, IntPtr hdcSource, int xSrc, int ySrc, int RasterOp);

        [DllImport("gdi32.dll", EntryPoint = "CreateCompatibleBitmap")]
        public static extern IntPtr CreateCompatibleBitmap(IntPtr hdc, int nWidth, int nHeight);

        [DllImport("gdi32.dll", EntryPoint = "CreateCompatibleDC")]
        public static extern IntPtr CreateCompatibleDC(IntPtr hdc);

        [DllImport("gdi32.dll", EntryPoint = "SelectObject")]
        public static extern IntPtr SelectObject(IntPtr hdc, IntPtr bmp);

        [Flags]
        private enum KeyStates
        {
            None = 0,
            Down = 1,
            Toggled = 2
        }

        [DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
        private static extern short GetKeyState(int keyCode);

        private static KeyStates GetKeyState(Keys key)
        {
            KeyStates state = KeyStates.None;
            short retVal = GetKeyState((int)key);
            //If the high-order bit is 1, the key is down
            //otherwise, it is up.
            if ((retVal & 0x8000) == 0x8000)
                state |= KeyStates.Down;

            //If the low-order bit is 1, the key is toggled.
            if ((retVal & 1) == 1)
                state |= KeyStates.Toggled;

            return state;
        }

        public static bool IsKeyDown(Keys key)
        {
            return KeyStates.Down == (GetKeyState(key) & KeyStates.Down);
        }

        public static bool IsKeyToggled(Keys key)
        {
            return KeyStates.Toggled == (GetKeyState(key) & KeyStates.Toggled);
        }




        public static Guid FolderSavedGames = new Guid("4C5C32FF-BB9D-43b0-B5B4-2D72E54EAAA4");
        [DllImport("shell32.dll", CharSet = CharSet.Auto)]
        public static extern int SHGetKnownFolderPath(ref Guid id, int flags, IntPtr token, out IntPtr path);

    }
}