#

internal static partial class user32
    {
        // hahdles

        [DllImport("USER32.DLL")]
        internal static extern int WaitForInputIdle(IntPtr hWnd, int dwMilliseconds);

        [DllImport("USER32.DLL", CharSet = CharSet.Auto)]
        internal static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        internal static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);

        [DllImport("user32.dll")]
        internal static extern byte VkKeyScan(char ch);

        //[DllImport("User32.Dll", EntryPoint = "PostMessageA")]
        [DllImport("User32.Dll")]
        internal static extern bool PostMessage(IntPtr hWnd, uint msg, int wParam, int lParam);

        [DllImport("User32.Dll")]
        internal static extern bool SendMessage(IntPtr hWnd, uint msg, int wParam, int lParam);

        [DllImport("user32.dll", EntryPoint = "GetWindowText", ExactSpelling = false, CharSet = CharSet.Auto, SetLastError = true)]
        internal static extern int GetWindowText(IntPtr hWnd, StringBuilder lpWindowText, int nMaxCount);

        [DllImport("user32.dll", EntryPoint = "SetWindowText", ExactSpelling = false, CharSet = CharSet.Auto, SetLastError = true)]
        internal static extern int SetWindowText(IntPtr hWnd, string lpWindowText);

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

        // Define the callback delegate's type.
        internal delegate bool EnumDelegate(IntPtr hWnd, int lParam);

        [DllImport("user32.dll", EntryPoint = "EnumDesktopWindows", ExactSpelling = false, CharSet = CharSet.Auto, SetLastError = true)]
        internal static extern bool EnumDesktopWindows(IntPtr hDesktop, EnumDelegate lpEnumCallbackFunction, IntPtr lParam);

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = false)]
        internal static extern IntPtr SendMessage(IntPtr handle, UInt32 message, IntPtr w, IntPtr l);

        internal static uint WM_CLOSE = 0x10;
        internal static void Close(this IntPtr hWnd) { SendMessage(hWnd, WM_CLOSE, IntPtr.Zero, IntPtr.Zero); }

        [DllImport("user32.dll", SetLastError = true)]
        internal static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);

        [DllImport("user32.dll", SetLastError = true)]
        internal static extern bool MoveWindow(IntPtr hWnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);

        [DllImport("user32.dll")]
        internal static extern int ShowWindowAsync(IntPtr hwnd, int nCmdShow);
        internal const int SW_MAXIMIZE = 3;
        internal const int SW_MINIMIZE = 6;
        internal static void Maximize(this IntPtr hWnd) { ShowWindowAsync(hWnd, SW_MAXIMIZE); }
        internal static void Minimize(this IntPtr hWnd) { ShowWindowAsync(hWnd, SW_MINIMIZE); }

        [DllImport("USER32.DLL")]
        public static extern bool SetForegroundWindow(IntPtr hWnd);

        [DllImport("USER32.DLL")]
        public static extern bool SetActiveWindow(IntPtr hWnd); 

        // grabs

        [DllImport("user32.dll")]
        internal static extern IntPtr GetForegroundWindow();

        [DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
        internal static extern IntPtr GetDesktopWindow();

        [DllImport("user32.dll")]
        internal static extern IntPtr GetWindowRect(IntPtr hWnd, ref Bounds rect);

        // mouse

        [DllImport("User32.dll")]
        internal static extern void mouse_event(MouseFlags dwFlags, int dx, int dy, int dwData, UIntPtr dwExtraInfo);

        [Flags]
        internal enum MouseFlags
        { Move = 0x0001, LeftDown = 0x0002, LeftUp = 0x0004, RightDown = 0x0008, RightUp = 0x0010, Absolute = 0x8000 };
    }