diff --git a/include/tr/class.h b/include/tr/class.h
index 647d2ab..58f4954 100644
--- a/include/tr/class.h
+++ b/include/tr/class.h
@@ -118,23 +118,25 @@
 
 
 /**
- * NEW. Create a static instance of a class.
+ * Create a static instance of a class.
  * This is new and currently it is only possible to create
  * instances for class that does not need a constructor.
  *
- * \todo
- * This macro requires to close the initializer
- * with an extra curly brancket. This is not nice...find a 
- * way to prevent this.
- * \todo
  * This does not call any constructor with any value...this 
- * has to be fixed.
+ * has to be fixed. // When this macro is used within a global
+ * (static) context this can't be fixed. No function can be 
+ * called from there. Instead I add a TR_objectInit function which
+ * takes an object name (created on either the stack or the
+ * heap) and a variable argument list and calls its constructor
+ * with the arguments.
  */
-#define TR_INSTANCE(class, name)          \
-	struct c_##class##_object _##name;    \
-	class name = &(_##name.data);         \
-	struct c_##class##_object _##name = { \
-		&c_##class, 
+#define TR_INSTANCE(class, name, ...)      \
+	struct c_##class##_object _##name;     \
+	class name = &(_##name.data);          \
+	struct c_##class##_object _##name = {  \
+		&c_##class,                        \
+		{  ##__VA_ARGS__ }                 \
+	}
 
 /**
  * I initialize _ (the class's base or parent class)
@@ -185,7 +187,7 @@
  *
  * /see TR_CLASS_MAGIC
  */
-#define TR_IS_OBJECT(obj)			\
+#define TR_IS_OBJECT(obj) \
 		((TR_GET_CLASS((obj)))->magic == TR_CLASS_MAGIC)
 
 /**
@@ -204,7 +206,7 @@
  *
  * \cond PRIVATE
  */
-#define _TR_CALL(_class,_iface,method,...)                                 \
+#define _TR_CALL(_class,_iface,method)                                     \
 	do {                                                                   \
 		TR_class_ptr class = _class;                                       \
 		iface = (struct i_##_iface *)TR_IFACE_GET(class, &i_##_iface);     \
@@ -226,11 +228,11 @@
  * \todo actually i use gcc feature ## for variadoc... think about
  * a way to make this standard.
  */
-#define TR_CALL(object,_iface,method,...)                              \
-	do {                                                               \
-		struct i_##_iface * iface;                                     \
-		_TR_CALL(TR_GET_CLASS(object), _iface, method, ##__VA_ARGS__); \
-		iface->method(object, ##__VA_ARGS__);                          \
+#define TR_CALL(object,_iface,method,...)               \
+	do {                                                \
+		struct i_##_iface * iface;                      \
+		_TR_CALL(TR_GET_CLASS(object), _iface, method); \
+		iface->method(object, ##__VA_ARGS__);           \
 	} while(0)
 
 /**
@@ -240,11 +242,11 @@
  *
  * \see TR_CALL
  */
-#define TR_RETCALL(object,_iface,method,ret,...)                       \
-	do {                                                               \
-		struct i_##_iface * iface;                                     \
-		_TR_CALL(TR_GET_CLASS(object), _iface, method, ##__VA_ARGS__); \
-		ret = iface->method(object, ##__VA_ARGS__);                    \
+#define TR_RETCALL(object,_iface,method,ret,...)        \
+	do {                                                \
+		struct i_##_iface * iface;                      \
+		_TR_CALL(TR_GET_CLASS(object), _iface, method); \
+		ret = iface->method(object, ##__VA_ARGS__);     \
 	} while(0)
 
 /**
@@ -253,13 +255,13 @@
  *
  * \see TR_CALL
  */
-#define TR_PARENTCALL(object,_iface,method,...)                    \
-	do {                                                           \
-		struct i_##_iface * iface;                                 \
-		TR_class_ptr pc_class = TR_GET_CLASS((object));            \
-		assert(TR_HAS_PARENT(pc_class));                           \
-		_TR_CALL(pc_class->parent, _iface, method, ##__VA_ARGS__); \
-		iface->method(object, ##__VA_ARGS__);                      \
+#define TR_PARENTCALL(object,_iface,method,...)         \
+	do {                                                \
+		struct i_##_iface * iface;                      \
+		TR_class_ptr pc_class = TR_GET_CLASS((object)); \
+		assert(TR_HAS_PARENT(pc_class));                \
+		_TR_CALL(pc_class->parent, _iface, method);     \
+		iface->method(object, ##__VA_ARGS__);           \
 	} while(0)
 
 /*
@@ -268,13 +270,13 @@
  *
  * \see TR_RETCALL
  */
-#define TR_PARENTRETCALL(object,_iface,method,ret,...)             \
-	do {                                                           \
-		struct i_##_iface * iface;                                 \
-		TR_class_ptr pc_class = TR_GET_CLASS((object));            \
-		assert(TR_HAS_PARENT(pc_class));                           \
-		_TR_CALL(pc_class->parent, _iface, method, ##__VA_ARGS__); \
-		ret = iface->method(object, ##__VA_ARGS__);                \
+#define TR_PARENTRETCALL(object,_iface,method,ret,...)  \
+	do {                                                \
+		struct i_##_iface * iface;                      \
+		TR_class_ptr pc_class = TR_GET_CLASS((object)); \
+		assert(TR_HAS_PARENT(pc_class));                \
+		_TR_CALL(pc_class->parent, _iface, method);     \
+		ret = iface->method(object, ##__VA_ARGS__);     \
 	} while(0)
 
 
diff --git a/include/tr/interface/class.h b/include/tr/interface/class.h
index 1947553..0a740b7 100644
--- a/include/tr/interface/class.h
+++ b/include/tr/interface/class.h
@@ -71,6 +71,16 @@ void * TR_classNew(TR_class_ptr, ...);
  */
 void * TR_classNewv(TR_class_ptr, va_list *);
 
+/**
+ * Interface caller function for i_class::ctor.
+ * This is called when an instance of a class is created
+ * with TR_INSTANCE (created on the stack).
+ * Never called directly.
+ *
+ * \see TR_delete
+ */
+int TR_objectInit(void *, ...);
+
 /**
  * Interface caller function for i_class::dtor.
  * Never called directly.
diff --git a/src/i_class.c b/src/i_class.c
index bd41f11..b5fb4b0 100644
--- a/src/i_class.c
+++ b/src/i_class.c
@@ -122,4 +122,24 @@ TR_classClone(void * _object)
 }
 /** endcond */
 
+/**
+ * Interface caller function for i_class::ctor.
+ * Call the constructor on an existing object identified by name.
+ * In fact it calls first the destructor to ensure that all
+ * possibly previously acquired resource are cleaned.
+ */
+int
+TR_objectInit(void * object, ...)
+{
+	int     ret;
+	va_list params;
+
+	va_start(params, object);
+	TR_CALL(object, TR_Class, dtor);
+	TR_RETCALL(object, TR_Class, ctor, ret, &params);
+	va_end(params);
+
+	return ret;
+}
+
 // vim: set ts=4 sw=4: