import tkinter as tk

class NoteTakingApp(tk.Tk):
    def __init__(self):
        super().__init__()
        self.title("Note Taking App")
        self.notes = []
        
        self.note_listbox = tk.Listbox(self)
        self.note_listbox.pack(side=tk.LEFT, fill=tk.BOTH, expand=True)
        
        self.text_editor = tk.Text(self)
        self.text_editor.pack(side=tk.TOP, fill=tk.BOTH, expand=True)
        
        self.create_note_button = tk.Button(self, text="Create Note", command=self.create_note)
        self.create_note_button.pack(side=tk.BOTTOM)
        
        self.load_notes() # Load existing notes
        
    def load_notes(self):
        # Load notes from file or database
        pass
    
    def save_notes(self):
        # Save notes to file or database
        pass
    
    def create_note(self):
        title = "Untitled" # Provide default title
        content = self.text_editor.get("1.0", tk.END)
        self.notes.append({"title": title, "content": content})
        self.refresh_note_list()
        self.save_notes()
        
    def refresh_note_list(self):
        self.note_listbox.delete(0, tk.END)
        for note in self.notes:
            self.note_listbox.insert(tk.END, note["title"])
            
    # Implement other methods for editing, deleting, formatting, and searching notes

if __name__ == "__main__":
    app = NoteTakingApp()
    app.mainloop()