diff --git a/include/Mw/String.h b/include/Mw/String.h
index 5987fad..6fe8b67 100644
--- a/include/Mw/String.h
+++ b/include/Mw/String.h
@@ -18,7 +18,7 @@ extern "C" {
  * @param str String
  * @return String
  */
-MWDECL char* MwStringDupliacte(const char* str);
+MWDECL char* MwStringDuplicate(const char* str);
 
 /*!
  * @brief Concatenates 2 strings
diff --git a/include/Mw/Widget/ListBox.h b/include/Mw/Widget/ListBox.h
index 66e7398..93e21bf 100644
--- a/include/Mw/Widget/ListBox.h
+++ b/include/Mw/Widget/ListBox.h
@@ -72,7 +72,7 @@ MwInline void MwListBoxInsert(MwWidget handle, int index, void* packet) {
  * @param index Index
  */
 MwInline void MwListBoxDelete(MwWidget handle, int index) {
-	MwVaWidgetExecute(handle, "mwListboxDelete", NULL, index);
+	MwVaWidgetExecute(handle, "mwListBoxDelete", NULL, index);
 }
 
 /*!
diff --git a/include/Mw/Widget/TreeView.h b/include/Mw/Widget/TreeView.h
index 77073f6..8dd3a46 100644
--- a/include/Mw/Widget/TreeView.h
+++ b/include/Mw/Widget/TreeView.h
@@ -19,6 +19,36 @@ extern "C" {
  */
 MWDECL MwClass MwTreeViewClass;
 
+/*!
+ * @brief Adds item to the treeview
+ * @param handle Widget
+ * @parma parent Parent
+ * @parma pixmap Pixmap
+ * @param item Item
+ */
+MwInline void* MwTreeViewAdd(MwWidget handle, void* parent, MwLLPixmap pixmap, const char* item) {
+	void* out;
+	MwVaWidgetExecute(handle, "mwTreeViewAdd", &out, parent, pixmap, item);
+	return out;
+}
+
+/*!
+ * @brief Deletes item from the treeview
+ * @param handle Widget
+ * @param item Item
+ */
+MwInline void MwTreeViewDelete(MwWidget handle, void* item) {
+	MwVaWidgetExecute(handle, "mwTreeViewDelete", NULL, item);
+}
+
+/*!
+ * @brief Resets the treeview
+ * @param handle Widget
+ */
+MwInline void MwTreeViewReset(MwWidget handle) {
+	MwVaWidgetExecute(handle, "mwTreeViewReset", NULL);
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/abstract/directory.c b/src/abstract/directory.c
index 119b42f..16376fb 100644
--- a/src/abstract/directory.c
+++ b/src/abstract/directory.c
@@ -60,7 +60,7 @@ MwDirectoryEntry* MwDirectoryRead(void* handle) {
 		free(entry);
 		return NULL;
 	}
-	entry->name = MwStringDupliacte(dir->ffd.cFileName);
+	entry->name = MwStringDuplicate(dir->ffd.cFileName);
 
 	if(dir->ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
 		entry->type = MwDIRECTORY_DIRECTORY;
@@ -81,7 +81,7 @@ MwDirectoryEntry* MwDirectoryRead(void* handle) {
 		free(entry);
 		return NULL;
 	}
-	entry->name = MwStringDupliacte(d->d_name);
+	entry->name = MwStringDuplicate(d->d_name);
 
 	p = malloc(strlen(dir->base) + 1 + strlen(d->d_name) + 1);
 	strcpy(p, dir->base);
@@ -174,7 +174,7 @@ static void MwDirectoryJoinSingle(char* target, char* p) {
 
 char* MwDirectoryJoin(char* a, char* b) {
 	char* p	   = malloc(strlen(a) + 1 + strlen(b) + 1);
-	char* bdup = MwStringDupliacte(b);
+	char* bdup = MwStringDuplicate(b);
 	char* b2   = bdup;
 	int   i;
 
diff --git a/src/backend/x11.c b/src/backend/x11.c
index abac619..fba2d1e 100644
--- a/src/backend/x11.c
+++ b/src/backend/x11.c
@@ -943,7 +943,7 @@ static char* MwLLGetClipboardImpl(MwLL handle) {
 
 				XGetWindowProperty(ev.xselection.display, ev.xselection.requestor, ev.xselection.property, 0, (~0L), 0, AnyPropertyType, &t, &format, &size, &N, (unsigned char**)&data);
 				if(t == target) {
-					r = MwStringDupliacte(data);
+					r = MwStringDuplicate(data);
 					XFree(data);
 				}
 				XDeleteProperty(ev.xselection.display, ev.xselection.requestor, ev.xselection.property);
diff --git a/src/core.c b/src/core.c
index 367fef2..ff7cd35 100644
--- a/src/core.c
+++ b/src/core.c
@@ -106,7 +106,7 @@ static void llfocusouthandler(MwLL handle, void* data) {
 MwWidget MwCreateWidget(MwClass widget_class, const char* name, MwWidget parent, int x, int y, unsigned int width, unsigned int height) {
 	MwWidget h = malloc(sizeof(*h));
 
-	h->name = MwStringDupliacte(name);
+	h->name = MwStringDuplicate(name);
 
 	h->parent   = parent;
 	h->children = NULL;
@@ -361,7 +361,7 @@ void MwSetText(MwWidget handle, const char* key, const char* value) {
 	if(strcmp(key, MwNtitle) == 0) {
 		MwLLSetTitle(handle->lowlevel, value);
 	} else {
-		char* v = MwStringDupliacte(value);
+		char* v = MwStringDuplicate(value);
 
 		if(shgeti(handle->text, key) != -1) free(shget(handle->text, key));
 
diff --git a/src/dialog/filechooser.c b/src/dialog/filechooser.c
index 33f35d7..b0eda3d 100644
--- a/src/dialog/filechooser.c
+++ b/src/dialog/filechooser.c
@@ -385,7 +385,7 @@ static void scan(MwWidget handle, const char* path, int record) {
 		qsort(fc->entries, arrlen(fc->entries), sizeof(MwDirectoryEntry*), qsort_files);
 
 		if(record) {
-			char* str = MwStringDupliacte(path);
+			char* str = MwStringDuplicate(path);
 
 			while(arrlen(fc->history) > fc->history_seek) {
 				free(fc->history[fc->history_seek]);
@@ -403,7 +403,7 @@ static void scan(MwWidget handle, const char* path, int record) {
 	}
 
 	if(fc->path != NULL) free(fc->path);
-	fc->path = MwStringDupliacte(path);
+	fc->path = MwStringDuplicate(path);
 
 	MwVaApply(fc->addr,
 		  MwNtext, path,
diff --git a/src/string.c b/src/string.c
index 0b21ba1..7835d50 100644
--- a/src/string.c
+++ b/src/string.c
@@ -1,7 +1,7 @@
 /* $Id$ */
 #include <Mw/Milsko.h>
 
-char* MwStringDupliacte(const char* str) {
+char* MwStringDuplicate(const char* str) {
 	char* r = malloc(strlen(str) + 1);
 	strcpy(r, str);
 
diff --git a/src/widget/combobox.c b/src/widget/combobox.c
index 56573c3..49dfba1 100644
--- a/src/widget/combobox.c
+++ b/src/widget/combobox.c
@@ -162,7 +162,7 @@ static void prop_change(MwWidget handle, const char* prop) {
 
 static void mwComboBoxAddImpl(MwWidget handle, int index, const char* text) {
 	MwComboBox cb = handle->internal;
-	char*	   t  = MwStringDupliacte(text);
+	char*	   t  = MwStringDuplicate(text);
 
 	if(index == -1) index = arrlen(cb->list);
 
diff --git a/src/widget/listbox.c b/src/widget/listbox.c
index abd1cb1..5c61e52 100644
--- a/src/widget/listbox.c
+++ b/src/widget/listbox.c
@@ -43,7 +43,7 @@ int MwListBoxPacketInsert(MwListBoxPacket* packet, int index) {
 }
 
 void MwListBoxPacketSet(MwListBoxPacket* packet, int index, int col, const char* text) {
-	char* t = text == NULL ? NULL : MwStringDupliacte(text);
+	char* t = text == NULL ? NULL : MwStringDuplicate(text);
 	int   i;
 
 	if(col == -1) col = arrlen(packet->names[index]);
@@ -410,7 +410,7 @@ static void mwListBoxInsertImpl(MwWidget handle, int index, MwListBoxPacket* pac
 		entry.name = NULL;
 		for(j = 0; j < max; j++) {
 			if(arrlen(packet->names[i]) > j && packet->names[i][j] != NULL) {
-				name = MwStringDupliacte(packet->names[i][j]);
+				name = MwStringDuplicate(packet->names[i][j]);
 				arrput(entry.name, name);
 			} else {
 				arrput(entry.name, NULL);
@@ -494,8 +494,6 @@ static void mwListBoxSetWidthImpl(MwWidget handle, int index, int width) {
 }
 
 static void func_handler(MwWidget handle, const char* name, void* out, va_list va) {
-	(void)out;
-
 	if(strcmp(name, "mwListBoxDelete") == 0) {
 		int index = va_arg(va, int);
 		mwListBoxDeleteImpl(handle, index);
diff --git a/src/widget/menu.c b/src/widget/menu.c
index 1842690..62fbafc 100644
--- a/src/widget/menu.c
+++ b/src/widget/menu.c
@@ -179,7 +179,7 @@ static void mouse_up(MwWidget handle, void* ptr) {
 static MwMenu mwMenuAddImpl(MwWidget handle, MwMenu menu, const char* name) {
 	MwMenu m   = menu == NULL ? handle->internal : menu;
 	MwMenu new = malloc(sizeof(*new));
-	new->name  = MwStringDupliacte(name);
+	new->name  = MwStringDuplicate(name);
 	new->sub   = NULL;
 	new->wsub  = NULL;
 	new->keep  = 0;
diff --git a/src/widget/treeview.c b/src/widget/treeview.c
index 024820e..656180c 100644
--- a/src/widget/treeview.c
+++ b/src/widget/treeview.c
@@ -282,37 +282,12 @@ static void resize(MwWidget handle) {
 
 static int create(MwWidget handle) {
 	MwTreeView	tv = malloc(sizeof(*tv));
-	MwTreeViewEntry e, e2, e3;
 	memset(tv, 0, sizeof(*tv));
 
 	handle->internal = tv;
 
 	MwSetDefault(handle);
 
-	e3.label = MwStringDupliacte("hello");
-	e3.pixmap = NULL;
-	e3.tree = NULL;
-	e3.opened = 1;
-	e3.selected = 0;
-	e3.click_time = 0;
-
-	e2.label = MwStringDupliacte("hello");
-	e2.pixmap = NULL;
-	e2.tree = NULL;
-	e2.opened = 1;
-	e2.selected = 0;
-	e2.click_time = 0;
-	arrput(e2.tree, e3);
-
-	e.label = MwStringDupliacte("hello");
-	e.pixmap = NULL;
-	e.tree = NULL;
-	e.opened = 1;
-	e.selected = 0;
-	e.click_time = 0;
-	arrput(e.tree, e2);
-	arrput(tv->tree, e);
-
 	MwSetInteger(handle, MwNsingleClickSelectable, 0);
 	MwSetInteger(handle, MwNleftPadding, 0);
 
@@ -343,6 +318,44 @@ static void prop_change(MwWidget handle, const char* prop) {
 	if(strcmp(prop, MwNwidth) == 0 || strcmp(prop, MwNheight) == 0) resize(handle);
 }
 
+static void* mwTreeViewAddImpl(MwWidget handle, void* parent, MwLLPixmap pixmap, const char* item){
+	MwTreeView tv = handle->internal;
+	MwTreeViewEntry t;
+
+	t.label = MwStringDuplicate(item);
+	t.pixmap = pixmap;
+	t.selected = 0;
+	t.opened = 1;
+	t.click_time = 0;
+
+	if(parent == NULL){
+		arrput(tv->tree, t);
+	}
+	resize(handle);
+}
+
+static void mwTreeViewDeleteImpl(MwWidget handle, void* item){
+}
+
+static void mwTreeViewResetImpl(MwWidget handle){
+}
+
+static void func_handler(MwWidget handle, const char* name, void* out, va_list va) {
+	if(strcmp(name, "mwTreeViewAdd") == 0){
+		void* parent = va_arg(va, void*);
+		MwLLPixmap pixmap = va_arg(va, MwLLPixmap);
+		const char* item = va_arg(va, const char*);
+		*(void**)out = mwTreeViewAddImpl(handle, parent, pixmap, item);
+	}
+	if(strcmp(name, "mwTreeViewDelete") == 0){
+		void* item = va_arg(va, void*);
+		mwTreeViewDeleteImpl(handle, item);
+	}
+	if(strcmp(name, "mwTreeViewReset") == 0){
+		mwTreeViewResetImpl(handle);
+	}
+}
+
 static void tick(MwWidget handle) {
 	MwTreeView tv = handle->internal;
 
@@ -363,7 +376,7 @@ MwClassRec MwTreeViewClassRec = {
     NULL,	 /* mouse_up */
     NULL,	 /* mouse_down */
     NULL,	 /* key */
-    NULL,	 /* execute */
+    func_handler,	 /* execute */
     tick,	 /* tick */
     NULL,
     NULL,