gistfile1.txt

diff --git a/src/ObjCRuntime/Class.cs b/src/ObjCRuntime/Class.cs
index ace21db..99d4556 100644
--- a/src/ObjCRuntime/Class.cs
+++ b/src/ObjCRuntime/Class.cs
@@ -30,7 +30,7 @@ using System;
 using System.Reflection;
 using System.Collections.Generic;
 using System.Runtime.InteropServices;
-
+using System.Drawing;
 using MonoMac.Foundation;
 
 namespace MonoMac.ObjCRuntime {
@@ -111,7 +111,7 @@ namespace MonoMac.ObjCRuntime {
 			} while (true);
 		}
 
-		internal static IntPtr Register (Type type) { 
+		internal static IntPtr Register (Type type) {
 			RegisterAttribute attr = (RegisterAttribute) Attribute.GetCustomAttribute (type, typeof (RegisterAttribute), false);
 			string name = attr == null ? type.FullName : attr.Name ?? type.FullName;
 			return Class.Register (type, name);
@@ -224,16 +224,33 @@ namespace MonoMac.ObjCRuntime {
 			RegisterMethod (minfo, ea, type, handle);
 		}
 
+		delegate void CB (IntPtr dest, IntPtr nso, IntPtr selector, IntPtr window, IntPtr sheet, RectangleF usingRect);
+		
 		internal unsafe static void RegisterMethod (MethodInfo minfo, ExportAttribute ea, Type type, IntPtr handle) {
 			NativeMethodBuilder builder = new NativeMethodBuilder (minfo, type, ea);
-
-			class_addMethod (minfo.IsStatic ? ((objc_class *) handle)->isa : handle, builder.Selector, builder.Delegate, builder.Signature);
-			method_wrappers.Add (builder.Delegate);
+			CB cb = WillPosition;
+			Delegate d;
+			if (minfo.Name == "WillPositionSheet")
+				d = cb;
+			else
+				d = builder.Delegate;
+
+			class_addMethod (minfo.IsStatic ? ((objc_class *) handle)->isa : handle, builder.Selector, d, builder.Signature);
+			method_wrappers.Add (d);
 #if DEBUG
 			Console.WriteLine ("[METHOD] Registering {0}[0x{1:x}|{2}] on {3} -> ({4})", ea.Selector, (int) builder.Selector, builder.Signature, type, minfo);
 #endif
 		}
 
+		static void WillPosition (IntPtr dest, IntPtr nso, IntPtr selector, IntPtr window, IntPtr sheet, RectangleF usingRect)
+		{
+			var anso = Runtime.GetNSObject (nso);
+			var awin = Runtime.GetNSObject (window);
+			var asheet = Runtime.GetNSObject (sheet);
+
+			Console.WriteLine ("Got {0} {1} {2} and {3}", anso, awin, asheet, usingRect);
+		}
+		
 		[DllImport ("/usr/lib/libobjc.dylib")]
 		extern static IntPtr objc_allocateClassPair (IntPtr superclass, string name, IntPtr extraBytes);
 		[DllImport ("/usr/lib/libobjc.dylib")]