1 files changed, 107 insertions, 0 deletions
diff --git a/Ryujinx.Ava/UI/Helpers/Win32NativeInterop.cs b/Ryujinx.Ava/UI/Helpers/Win32NativeInterop.cs
new file mode 100644
index 00000000..1e6e3c3b
--- /dev/null
+++ b/Ryujinx.Ava/UI/Helpers/Win32NativeInterop.cs
@@ -0,0 +1,107 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
+
+namespace Ryujinx.Ava.UI.Helpers
+{
+    [SupportedOSPlatform("windows")]
+    internal partial class Win32NativeInterop
+    {
+        [Flags]
+        public enum ClassStyles : uint
+        {
+            CS_CLASSDC = 0x40,
+            CS_OWNDC = 0x20,
+        }
+
+        [Flags]
+        public enum WindowStyles : uint
+        {
+            WS_CHILD = 0x40000000
+        }
+
+        public enum Cursors : uint
+        {
+            IDC_ARROW = 32512
+        }
+
+        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>();
+            }
+        }
+
+        [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);
+    }
+}