Added logitech support (unfinished: HID-Ids and layouts are missing)

RGB.NET.Devices.Logitech/Helper/CultureHelper.cs

@@ -0,0 +1,44 @@
+using System;
+using System.Globalization;
+using System.Runtime.InteropServices;
+
+namespace RGB.NET.Devices.Logitech
+{
+    /// <summary>
+    /// Offers some helper-methods for culture related things.
+    /// </summary>
+    public static class CultureHelper
+    {
+        #region DLLImports
+
+        [DllImport("user32.dll")]
+        static extern IntPtr GetKeyboardLayout(uint thread);
+
+        #endregion
+
+        #region Constructors
+
+        #endregion
+
+        #region Methods
+
+        /// <summary>
+        /// Gets the current keyboard-layout from the OS.
+        /// </summary>
+        /// <returns>The current keyboard-layout</returns>
+        public static CultureInfo GetCurrentCulture()
+        {
+            try
+            {
+                int keyboardLayout = GetKeyboardLayout(0).ToInt32() & 0xFFFF;
+                return new CultureInfo(keyboardLayout);
+            }
+            catch
+            {
+                return new CultureInfo(1033); // en-US on error.
+            }
+        }
+
+        #endregion
+    }
+}