Add OS-specific interop

Source/_Demos/LoadByOS/WindowsConfigApp/WinInterop.cs

@@ -0,0 +1,29 @@
+using CrossPlatformClientExe;
+
+namespace WindowsConfigApp
+{
+	internal class WinInterop : IInteropFunctions
+	{
+		private string InitValue1 { get; }
+		private int InitValue2 { get; }
+
+		public WinInterop() { }
+        public WinInterop(string initValue1, int initValue2)
+		{
+			InitValue1 = initValue1;
+			InitValue2 = initValue2;
+		}
+
+		public void CopyTextToClipboard(string text) => Clipboard.SetDataObject(text, true, 5, 150);
+
+        public void ShowForm()
+		{
+			ApplicationConfiguration.Initialize();
+			Application.Run(new Form1());
+		}
+
+		public string TransformInit1() => InitValue1.ToUpper();
+
+		public int TransformInit2() => InitValue2 * InitValue2;
+	}
+}