diff --git a/examples/app/main.go b/examples/app/main.go
index 336466f..689b095 100644
--- a/examples/app/main.go
+++ b/examples/app/main.go
@@ -10,6 +10,15 @@ import (
 //Shortcut for literal NSStrings
 var nst = ns.NSStringWithGoString
 
+func pb1() {
+	fmt.Println("Pushed button 1")
+}
+
+func pb2() {
+	fmt.Println("Pushed button 2")
+	a.Terminate(a)
+}
+
 func didFinishLaunching(n ns.NSNotification) {
 	fmt.Println("Go: did finish launching")
 	fmt.Printf("Notification: %s\n",n.Name().UTF8String())
@@ -50,13 +59,25 @@ func didFinishLaunching(n ns.NSNotification) {
 
 	a.SetMainMenu(m1)
 
-	//add some buttons and do some layout
+	//add some custom buttons
 
-	//don't do this:
-	//b := ns.NSButtonAlloc().InitWithFrame(ns.NSMakeRect(100,100,100,50))
+	b1 := ns.GButtonAlloc()
+	b2 := ns.GButtonAlloc()
+
+	b1.Init()
+	b1.PressedCallback(pb1)
+	b1.SetAction(ns.Selector("pressed"))
+	b1.SetTarget(b1)
+	b1.SetTitle(nst("PUSH"))
+
+	b2.Init()
+	b2.PressedCallback(pb2)
+	b2.SetTarget(b2)
+	b2.SetAction(ns.Selector("pressed"))
+	b2.SetTitle(nst("QUIT"))
+
+	//add some layout constraints
 
-	b1 := ns.NSButtonWithTitle(nst("PUSH"),ns.Id{},ns.Selector(""))
-	b2 := ns.NSButtonWithTitle(nst("QUIT"),ns.Id{},ns.Selector("terminate:"))
 	b1.SetTranslatesAutoresizingMaskIntoConstraints(0)
 	b2.SetTranslatesAutoresizingMaskIntoConstraints(0)
 
diff --git a/examples/app/nswrap.yaml b/examples/app/nswrap.yaml
index 01274bf..5b29b56 100644
--- a/examples/app/nswrap.yaml
+++ b/examples/app/nswrap.yaml
@@ -5,7 +5,6 @@ inputfiles:
 
 classes:
     - NSAutoreleasePool
-    - NSEnumerator
     - NSString
     - NSApplication
     - NSWindow
@@ -13,14 +12,14 @@ classes:
     - NSMenu
     - NSMenuItem
     - NSButton
+    - NSControl
     - NSNotification
-    - NSStackView
     - NSLayoutConstraint
     - NSDictionary
     - NSArray
     - NSObject
 
-functions: [NSMake.*]
+functions: [ NSMakeRect ]
 
 enums:
     - NSApplication.*
@@ -38,6 +37,11 @@ delegates:
         - applicationShouldTerminateAfterLastWindowClosed
         - applicationDidBecomeActive
 
+subclasses:
+    GButton:
+        NSButton:
+            - -(void)pressed
+
 frameworks: [ Foundation, AppKit ]
 pragma: [ clang diagnostic ignored "-Wformat-security" ]
 
diff --git a/examples/foundation/main.go b/examples/foundation/main.go
index 8760e32..81c51d5 100644
--- a/examples/foundation/main.go
+++ b/examples/foundation/main.go
@@ -15,6 +15,7 @@ func main() {
 	n2 := ns.NSStringAlloc()
 	n2 = n2.InitWithGoString("hi world")
 	n3 := ns.NSStringWithGoString("ok bye")
+	fmt.Printf("%s\n",n3)
 	a := ns.NSMutableArrayWithObjects(n1,n2,n3)
 	fmt.Println("Length(a) = ",a.Count())
 	fmt.Println("is n2 in a?",a.ContainsObject(n2))
@@ -30,7 +31,7 @@ func main() {
 	fmt.Printf("i1 = %@\n",i1)
 	fmt.Printf("i1.Ptr() = %p\n",i1.Ptr())
 	a.ObjectEnumerator().ForIn(func(o ns.Id) bool {
-		fmt.Println(o.NSString().UTF8String())
+		fmt.Println(o.NSString())
 		return true
 	})
 	s1 := ns.NSSetWithObjects(n1,n2)
diff --git a/examples/simple/nswrap.yaml b/examples/simple/nswrap.yaml
index df1e96d..9481111 100644
--- a/examples/simple/nswrap.yaml
+++ b/examples/simple/nswrap.yaml
@@ -4,7 +4,7 @@ classes:
     - ClassOne
     - ClassTwo
 subclasses:
-    ClassThree:
+    classThree:
         ClassTwo:
             - geti1
             - -(void)myMethod1:(int)a
diff --git a/wrap/main.go b/wrap/main.go
index 12feaad..9cc4562 100644
--- a/wrap/main.go
+++ b/wrap/main.go
@@ -664,8 +664,8 @@ func (w *Wrapper) _processType(bt *types.Type, gt string) {
 	if gt == "Char" {
 		w.CharHelpers()
 	}
-	if gt == "NSEnumerator" {
-		w.EnumeratorHelpers()
+	if gt == "NSString" {
+		w.StringHelpers()
 	}
 	if gt == "SEL" {
 		w.SelectorHelpers()
@@ -701,6 +701,14 @@ func (c *Char) String() string {
 `)
 }
 
+func (w *Wrapper) StringHelpers() {
+	w.goHelpers.WriteString(`
+func (o NSString) String() string {
+	return o.UTF8String().String()
+}
+`)
+}
+
 func (w *Wrapper) EnumeratorHelpers() {
 	w.goHelpers.WriteString(`
 func (e NSEnumerator) ForIn(f func(Id) bool) {
@@ -791,7 +799,7 @@ func (w *Wrapper) _processMethod(m *Method,fun bool) {
 	gname = strings.ReplaceAll(gname," ","")
 	receiver := ""
 	cname := m.Name
-	fmt.Printf("Method %s (GoClass %s)\n",cname,m.GoClass)
+	//fmt.Printf("Method %s (GoClass %s)\n",cname,m.GoClass)
 	switch {
 	case !m.ClassMethod:
 		if types.IsGoInterface(m.GoClass) {
@@ -1016,8 +1024,9 @@ func (w *Wrapper) MethodFromSig(sig,class string) *Method {
 
 func (w *Wrapper) ProcessSubclass(sname string, sc *Subclass) {
 	fmt.Printf("Wrapping %s\n",sname)
-	types.Wrap(sname)
-	types.SetSuper(sname,sc.Super)
+	gname := strings.Title(sname)
+	types.Wrap(gname)
+	types.SetSuper(gname,sc.Super)
 	ps := map[string][]string{}
 	ps[sc.Super] = sc.Overrides
 	nms := make([]*Method,len(sc.NewMethods))
@@ -1062,16 +1071,16 @@ func (w *Wrapper) _ProcessDelSub(dname string, ps map[string][]string, nms []*Me
 		i++
 		var ms map[string]*Method
 		if sub {
+			interf := w.Interfaces[pname]
+			supr = interf.GoName
 			if i > 1 {
 				fmt.Printf("Multiple inheritance is not permitted:\n    subclass %s already inherits from %s\n",dname,supr)
 				os.Exit(-1)
 			}
-			interf := w.Interfaces[pname]
 			if interf == nil {
 				fmt.Printf("Failed to find interface %s for subclass %s\n",pname,dname)
 				os.Exit(-1)
 			}
-			supr = interf.GoName
 			//fmt.Printf("  subclass for %s\n",pname)
 			ms = map[string]*Method{}
 			var addmeths func(s string)
@@ -1094,6 +1103,7 @@ func (w *Wrapper) _ProcessDelSub(dname string, ps map[string][]string, nms []*Me
 			}
 			//fmt.Printf("  proto %s\n",pname)
 			ms = proto.InstanceMethods
+			types.SetSuper(dname,"Id")
 			supr = "Id"
 		}
 		for gname,m := range ms {
@@ -1272,7 +1282,7 @@ func (w *Wrapper) _ProcessDelSub(dname string, ps map[string][]string, nms []*Me
 {
 	%s[(%s*)self super_%s];
 }
-`,sfp,ret,gname,strings.Join(vpnames[i]," "))
+`,sfp,ret,dname,strings.Join(vpnames[i]," "))
 		}
 	}
 	ccode.WriteString(fmt.Sprintf(`
@@ -1315,7 +1325,7 @@ func %sAlloc() %s {
 	dispitems := make([]string,len(gnames))
 	sdispitems := make([]string,sms)
 	for i,n := range gnames {
-		if !sub {
+		if !sub || sms == 0 {
 			gtypes[i] = gtypes[i][1:]
 		}
 		dispitems[i] = fmt.Sprintf(
@@ -1332,7 +1342,7 @@ type %sDispatch struct {
 var %sLookup map[unsafe.Pointer]%sDispatch =
 	map[unsafe.Pointer]%sDispatch{}
 `,gname,strings.Join(dispitems,"\n"),gname,gname,gname))
-	if sub {
+	if sub && sms > 0 {
 		gocode.WriteString(fmt.Sprintf(`
 type %sSupermethods struct {
 %s
@@ -1359,7 +1369,7 @@ func (d %s) %sCallback(f func(%s)%s) {
 		earglist := []string{"o unsafe.Pointer"}
 		garglist := []string{}
 		gargconv := []string{}
-		if sub {
+		if sub && sms > 0 {
 			garglist = []string{"super"}
 		}
 		for j := 1; j < len(vnames[i]); j++ {
@@ -1409,7 +1419,7 @@ func (d %s) %sCallback(f func(%s)%s) {
 `		self.Super%s`,gnames[i])
 		}
 		sper := ""
-		if sub && len(gnames) > 0 {
+		if sub && sms > 0 {
 			sper = fmt.Sprintf(
 `	self := (*%s)(o)
 	super := %sSupermethods{
@@ -1500,6 +1510,9 @@ func (w *Wrapper) Wrap(toproc []string) {
 			continue
 		}
 		w.processType(types.NewTypeFromString(i.GoName,""))
+		if i.Name == "NSEnumerator" {
+			w.EnumeratorHelpers()
+		}
 		gname := i.GoName
 		if types.IsGoInterface(i.GoName) {
 			gname = "Id"