forgot an add

BizHawk.MultiClient/ExternalCoreSupport.cs

@@ -0,0 +1,61 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Linq;
+using System.Diagnostics;
+using System.Globalization;
+using System.IO;
+using System.Collections.Generic;
+
+using BizHawk;
+
+namespace BizHawk.MultiClient
+{
+
+	/// <summary>
+	/// accesses a shared library using LoadLibrary and GetProcAddress
+	/// </summary>
+	public class Win32LibAccessor : ILibAccessor
+	{
+		public Win32LibAccessor(string dllPath)
+		{
+			mDllHandle = LoadLibrary(dllPath);
+			if (mDllHandle == IntPtr.Zero) return;
+			IsOpen = true;
+		}
+
+		public bool IsOpen { get; private set; }
+
+		IntPtr mDllHandle;
+
+		IntPtr ILibAccessor.GetProcAddress(string name)
+		{
+			if (!IsOpen) throw new InvalidOperationException("dll was not opened, you can't get a symbol from it");
+			IntPtr ret = GetProcAddress(mDllHandle, name);
+			if (ret == IntPtr.Zero) throw new InvalidOperationException("symbol name was not found in dll!");
+			return ret;
+		}
+
+		public void Dispose()
+		{
+			if (mDllHandle == IntPtr.Zero)
+				FreeLibrary(mDllHandle);
+			mDllHandle = IntPtr.Zero;
+			IsOpen = false;
+		}
+
+		~Win32LibAccessor()
+		{
+			Dispose();
+		}
+
+		[DllImport("kernel32.dll")]
+		public static extern IntPtr LoadLibrary(string dllToLoad);
+
+		[DllImport("kernel32.dll")]
+		public static extern IntPtr GetProcAddress(IntPtr hModule, string procedureName);
+
+		[DllImport("kernel32.dll")]
+		public static extern bool FreeLibrary(IntPtr hModule);
+	}
+
+}