1 files changed, 125 insertions, 0 deletions
diff --git a/src/Ryujinx/UI/Helpers/Win32NativeInterop.cs b/src/Ryujinx/UI/Helpers/Win32NativeInterop.cs
new file mode 100644
index 00000000..4834df80
--- /dev/null
+++ b/src/Ryujinx/UI/Helpers/Win32NativeInterop.cs
@@ -0,0 +1,125 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
+
+namespace Ryujinx.Ava.UI.Helpers
+{
+    [SupportedOSPlatform("windows")]
+    internal partial class Win32NativeInterop
+    {
+        [Flags]
+        public enum ClassStyles : uint
+        {
+            CsClassdc = 0x40,
+            CsOwndc = 0x20,
+        }
+
+        [Flags]
+        public enum WindowStyles : uint
+        {
+            WsChild = 0x40000000,
+        }
+
+        public enum Cursors : uint
+        {
+            IdcArrow = 32512,
+        }
+
+        [SuppressMessage("Design", "CA1069: Enums values should not be duplicated")]
+        public enum WindowsMessages : uint
+        {
+            Mousemove = 0x0200,
+            Lbuttondown = 0x0201,
+            Lbuttonup = 0x0202,
+            Lbuttondblclk = 0x0203,
+            Rbuttondown = 0x0204,
+            Rbuttonup = 0x0205,
+            Rbuttondblclk = 0x0206,
+            Mbuttondown = 0x0207,
+            Mbuttonup = 0x0208,
+            Mbuttondblclk = 0x0209,
+            Mousewheel = 0x020A,
+            Xbuttondown = 0x020B,
+            Xbuttonup = 0x020C,
+            Xbuttondblclk = 0x020D,
+            Mousehwheel = 0x020E,
+            Mouselast = 0x020E,
+        }
+
+        [UnmanagedFunctionPointer(CallingConvention.Winapi)]
+        internal delegate IntPtr WindowProc(IntPtr hWnd, WindowsMessages msg, IntPtr wParam, IntPtr lParam);
+
+        [StructLayout(LayoutKind.Sequential)]
+        public struct WndClassEx
+        {
+            public int cbSize;
+            public ClassStyles style;
+            public IntPtr lpfnWndProc; // not WndProc
+            public int cbClsExtra;
+            public int cbWndExtra;
+            public IntPtr hInstance;
+            public IntPtr hIcon;
+            public IntPtr hCursor;
+            public IntPtr hbrBackground;
+            public IntPtr lpszMenuName;
+            public IntPtr lpszClassName;
+            public IntPtr hIconSm;
+
+            public WndClassEx()
+            {
+                cbSize = Marshal.SizeOf<WndClassEx>();
+            }
+        }
+
+        public static IntPtr CreateEmptyCursor()
+        {
+            return CreateCursor(IntPtr.Zero, 0, 0, 1, 1, new byte[] { 0xFF }, new byte[] { 0x00 });
+        }
+
+        public static IntPtr CreateArrowCursor()
+        {
+            return LoadCursor(IntPtr.Zero, (IntPtr)Cursors.IdcArrow);
+        }
+
+        [LibraryImport("user32.dll")]
+        public static partial IntPtr SetCursor(IntPtr handle);
+
+        [LibraryImport("user32.dll")]
+        public static partial IntPtr CreateCursor(IntPtr hInst, int xHotSpot, int yHotSpot, int nWidth, int nHeight, [In] byte[] pvAndPlane, [In] byte[] pvXorPlane);
+
+        [LibraryImport("user32.dll", SetLastError = true, EntryPoint = "RegisterClassExW")]
+        public static partial ushort RegisterClassEx(ref WndClassEx param);
+
+        [LibraryImport("user32.dll", SetLastError = true, EntryPoint = "UnregisterClassW")]
+        public static partial short UnregisterClass([MarshalAs(UnmanagedType.LPWStr)] string lpClassName, IntPtr instance);
+
+        [LibraryImport("user32.dll", EntryPoint = "DefWindowProcW")]
+        public static partial IntPtr DefWindowProc(IntPtr hWnd, WindowsMessages msg, IntPtr wParam, IntPtr lParam);
+
+        [LibraryImport("kernel32.dll", EntryPoint = "GetModuleHandleA")]
+        public static partial IntPtr GetModuleHandle([MarshalAs(UnmanagedType.LPStr)] string lpModuleName);
+
+        [LibraryImport("user32.dll", SetLastError = true)]
+        [return: MarshalAs(UnmanagedType.Bool)]
+        public static partial bool DestroyWindow(IntPtr hwnd);
+
+        [LibraryImport("user32.dll", SetLastError = true, EntryPoint = "LoadCursorA")]
+        public static partial IntPtr LoadCursor(IntPtr hInstance, IntPtr lpCursorName);
+
+        [LibraryImport("user32.dll", SetLastError = true, EntryPoint = "CreateWindowExW")]
+        public static partial IntPtr CreateWindowEx(
+           uint dwExStyle,
+           [MarshalAs(UnmanagedType.LPWStr)] string lpClassName,
+           [MarshalAs(UnmanagedType.LPWStr)] string lpWindowName,
+           WindowStyles dwStyle,
+           int x,
+           int y,
+           int nWidth,
+           int nHeight,
+           IntPtr hWndParent,
+           IntPtr hMenu,
+           IntPtr hInstance,
+           IntPtr lpParam);
+    }
+}