diff --git a/tkinter-enter-classed-2.py b/tkinter-enter-classed-2.py
new file mode 100644
index 0000000..6615d7b
--- /dev/null
+++ b/tkinter-enter-classed-2.py
@@ -0,0 +1,54 @@
+import tkinter as tk
+from tkinter import ttk
+
+from generic import sanitize, type_hosts_listed, type_hosts_organized
+
+class App(tk.Tk):
+    def __init__(self, *args, **kwargs):
+        tk.Tk.__init__(self, *args, **kwargs)
+        self.wm_title("Testing out classing my application")
+
+        container = tk.Frame(self, height=400, width=600)
+        container.pack(side="top", fill="both", expand=True)
+
+        container.grid_rowconfigure(0, weight=1)
+        container.grid_columnconfigure(0, weight=1)
+        self.var = tk.Variable()
+
+        # I think this goes wrong for my purposes: I'm not switching frames in place, but keeping them besides each other. Find a simpler setup maybe?
+        self.frames = {}
+        for F in (InputFrame, LookupFrame):
+            frame = F(container, self)
+            frame.grid(row=0, column=0, sticky='nsew')
+
+class InputFrame(tk.Frame):
+    def __init__(self, parent, controller):
+        tk.Frame.__init__(self, parent)
+        label = tk.Label(self, text="Input URL, IP, email address")
+        label.pack(padx=10, pady=10)
+        self.var = tk.Variable()
+    
+        self.entry = ttk.Entry(self)
+        self.entry.focus()
+        self.entry.pack(padx=10, pady=10)        
+        self.entry.bind("<Return>", self.key_handler_function)
+
+    def key_handler_function(self, event) -> None:
+        inputs = self.entry.get()
+        sanitized = sanitize.strip_and_list(inputs)
+        typed = type_hosts_organized.type_hosts(sanitized)
+        self.var.set(typed)
+
+class LookupFrame(tk.Frame):
+    def __init__(self, parent, controller):
+        tk.Frame.__init__(self, parent)
+        label = tk.Label(self, text="Lookup information")
+        label.pack(padx=10, pady=10)
+        var = controller.var.get()
+        print(var)
+
+if __name__ == "__main__":
+    testObj = App()
+    testObj.mainloop()
+
+
diff --git a/tkinter-enter-classed.py b/tkinter-enter-classed.py
index ab11722..09ee53e 100644
--- a/tkinter-enter-classed.py
+++ b/tkinter-enter-classed.py
@@ -56,8 +56,8 @@ class LookupFrame(ttk.Frame):
 
 
 class App(tk.Tk):
-    def __init__(self):
-        super().__init__()
+    def __init__(self, *args, **kwargs):
+        super().__init__(self, *args, **kwargs)
         self.title(APP_TITLE)
         self.geometry("400x150")
         self.resizable(None, None)
diff --git a/tkinter-example-oop-3.py b/tkinter-example-oop-3.py
new file mode 100644
index 0000000..e2b45cb
--- /dev/null
+++ b/tkinter-example-oop-3.py
@@ -0,0 +1,72 @@
+import tkinter as tk
+from tkinter import ttk
+
+
+class windows(tk.Tk):
+    def __init__(self, *args, **kwargs):
+        tk.Tk.__init__(self, *args, **kwargs)
+        self.wm_title("Test Application")
+
+        container = tk.Frame(self, height=400, width=600)
+        container.pack(side="top", fill="both", expand=True)
+
+        container.grid_rowconfigure(0, weight=1)
+        container.grid_columnconfigure(0, weight=1)
+
+        self.frames = {}
+        for F in (MainPage, SidePage, CompletionScreen):
+            frame = F(container, self)
+
+            self.frames[F] = frame
+            frame.grid(row=0, column=0, sticky="nsew")
+
+        self.show_frame(MainPage)
+
+    def show_frame(self, cont):
+        frame = self.frames[cont]
+        frame.tkraise()
+
+
+class MainPage(tk.Frame):
+    def __init__(self, parent, controller):
+        tk.Frame.__init__(self, parent)
+        label = tk.Label(self, text="Main Page")
+        label.pack(padx=10, pady=10)
+
+        # We use the switch_window_button in order to call the show_frame() method as a lambda function
+        switch_window_button = tk.Button(
+            self,
+            text="Go to the Side Page",
+            command=lambda: controller.show_frame(SidePage),
+        )
+        switch_window_button.pack(side="bottom", fill=tk.X)
+
+
+class SidePage(tk.Frame):
+    def __init__(self, parent, controller):
+        tk.Frame.__init__(self, parent)
+        label = tk.Label(self, text="This is the Side Page")
+        label.pack(padx=10, pady=10)
+
+        switch_window_button = tk.Button(
+            self,
+            text="Go to the Completion Screen",
+            command=lambda: controller.show_frame(CompletionScreen),
+        )
+        switch_window_button.pack(side="bottom", fill=tk.X)
+
+
+class CompletionScreen(tk.Frame):
+    def __init__(self, parent, controller):
+        tk.Frame.__init__(self, parent)
+        label = tk.Label(self, text="Completion Screen, we did it!")
+        label.pack(padx=10, pady=10)
+        switch_window_button = ttk.Button(
+            self, text="Return to menu", command=lambda: controller.show_frame(MainPage)
+        )
+        switch_window_button.pack(side="bottom", fill=tk.X)
+
+
+if __name__ == "__main__":
+    testObj = windows()
+    testObj.mainloop()
diff --git a/tkinter-oop-2.py b/tkinter-oop-2.py
deleted file mode 100644
index bb9bcfb..0000000
--- a/tkinter-oop-2.py
+++ /dev/null
@@ -1,96 +0,0 @@
-# from: https://www.pythontutorial.net/tkinter/tkinter-object-oriented-frame/
-
-import tkinter as tk
-from tkinter import ttk
-
-
-class InputFrame(ttk.Frame):
-    def __init__(self, container):
-        super().__init__(container)
-        # setup the grid layout manager
-        self.columnconfigure(0, weight=1)
-        self.columnconfigure(0, weight=3)
-
-        self.__create_widgets()
-
-    def __create_widgets(self):
-        # Find what
-        ttk.Label(self, text='Find what:').grid(column=0, row=0, sticky=tk.W)
-        keyword = ttk.Entry(self, width=30)
-        keyword.focus()
-        keyword.grid(column=1, row=0, sticky=tk.W)
-
-        # Replace with:
-        ttk.Label(self, text='Replace with:').grid(
-            column=0, row=1, sticky=tk.W)
-        replacement = ttk.Entry(self, width=30)
-        replacement.grid(column=1, row=1, sticky=tk.W)
-
-        # Match Case checkbox
-        match_case = tk.StringVar()
-        match_case_check = ttk.Checkbutton(
-            self,
-            text='Match case',
-            variable=match_case,
-            command=lambda: print(match_case.get()))
-        match_case_check.grid(column=0, row=2, sticky=tk.W)
-
-        # Wrap Around checkbox
-        wrap_around = tk.StringVar()
-        wrap_around_check = ttk.Checkbutton(
-            self,
-            variable=wrap_around,
-            text='Wrap around',
-            command=lambda: print(wrap_around.get()))
-        wrap_around_check.grid(column=0, row=3, sticky=tk.W)
-
-        for widget in self.winfo_children():
-            widget.grid(padx=0, pady=5)
-
-
-class ButtonFrame(ttk.Frame):
-    def __init__(self, container):
-        super().__init__(container)
-        # setup the grid layout manager
-        self.columnconfigure(0, weight=1)
-
-        self.__create_widgets()
-
-    def __create_widgets(self):
-        ttk.Button(self, text='Find Next').grid(column=0, row=0)
-        ttk.Button(self, text='Replace').grid(column=0, row=1)
-        ttk.Button(self, text='Replace All').grid(column=0, row=2)
-        ttk.Button(self, text='Cancel').grid(column=0, row=3)
-
-        for widget in self.winfo_children():
-            widget.grid(padx=0, pady=3)
-
-
-class App(tk.Tk):
-    def __init__(self):
-        super().__init__()
-        self.title('Replace')
-        self.geometry('400x150')
-        self.resizable(0, 0)
-        # windows only (remove the minimize/maximize button)
-        # self.attributes('-toolwindow', True)
-
-        # layout on the root window
-        self.columnconfigure(0, weight=4)
-        self.columnconfigure(1, weight=1)
-
-        self.__create_widgets()
-
-    def __create_widgets(self):
-        # create the input frame
-        input_frame = InputFrame(self)
-        input_frame.grid(column=0, row=0)
-
-        # create the button frame
-        button_frame = ButtonFrame(self)
-        button_frame.grid(column=1, row=0)
-
-
-if __name__ == "__main__":
-    app = App()
-    app.mainloop()