title: Tkinter. Press Enter in Entry box. Append to Text box. How?
body: <p>I am making a chat program and decided to use Tkinter for the interface.</p>
  
  <p>What I wanna do is a breeze in C# but Tkinter is new to me.</p>
  
  <p>Basically I have a form with a Entry control and a Text control.</p>
  
  <p>I want to know how to append text from the Entry control to the Text control after the user presses Enter.</p>
  
  <p>Here's my code so far:</p>
  
  <pre><code>from tkinter import *
  
  class Application:
  
      def hello(self):
          msg = tkinter.messagebox.askquestion('title','question')
  
      def __init__(self, form):
          form.resizable(0,0)
          form.minsize(200, 200)
          form.title('Top Level')
  
          # Global Padding pady and padx
          pad_x = 5
          pad_y = 5
  
          # create a toplevel menu
          menubar = Menu(form)
          #command= parameter missing.
          menubar.add_command(label="Menu1")
          #command= parameter missing.
          menubar.add_command(label="Menu2")
          #command= parameter missing.
          menubar.add_command(label="Menu3")
  
          # display the menu
          form.config(menu=menubar)
  
          # Create controls
  
          label1 = Label(form, text="Label1")
          textbox1 = Entry(form)
          #command= parameter missing.
          button1 = Button(form, text='Button1')
  
          scrollbar1 = Scrollbar(form)
          textarea1 = Text(form, width=20, height=10)
  
          textarea1.config(yscrollcommand=scrollbar1.set)
          scrollbar1.config(command=textarea1.yview)
  
          textarea1.grid(row=0, column=1, padx=pad_x, pady=pad_y, sticky=W)
          scrollbar1.grid(row=0, column=2, padx=pad_x, pady=pad_y, sticky=W)
          textbox1.grid(row=1, column=1, padx=pad_x, pady=pad_y, sticky=W)
          button1.grid(row=1, column=2, padx=pad_x, pady=pad_y, sticky=W)
  
          form.mainloop()
  
  root = Tk()
  Application(root)
  </code></pre>