diff --git a/customtkinter/__init__.py b/customtkinter/__init__.py
index 956e803..379e22a 100644
--- a/customtkinter/__init__.py
+++ b/customtkinter/__init__.py
@@ -19,7 +19,6 @@ from distutils.version import StrictVersion as Version
 import tkinter
 import os
 import sys
-from ctypes import windll, byref, create_unicode_buffer, create_string_buffer
 
 
 def enable_macos_darkmode():
@@ -62,18 +61,21 @@ def set_default_color_theme(color_string):
     CTkColorManager.initialize_color_theme(color_string)
 
 
-FR_PRIVATE = 0x10
-FR_NOT_ENUM = 0x20
+if sys.platform.startswith("win"):
+    from ctypes import windll, byref, create_string_buffer
+
+    FR_PRIVATE = 0x10
+    FR_NOT_ENUM = 0x20
 
 
-def loadfont(fontpath: str, private=True, enumerable=False):
-    pathbuf = create_string_buffer(bytes(fontpath, "utf-8"))
-    add_font_resource_ex = windll.gdi32.AddFontResourceExA
-    flags = (FR_PRIVATE if private else 0) | (FR_NOT_ENUM if not enumerable else 0)
-    num_fonts_added = add_font_resource_ex(byref(pathbuf), flags, 0)
-    return bool(num_fonts_added)
+    def loadfont(fontpath: str, private=True, enumerable=False):
+        pathbuf = create_string_buffer(bytes(fontpath, "utf-8"))
+        add_font_resource_ex = windll.gdi32.AddFontResourceExA
+        flags = (FR_PRIVATE if private else 0) | (FR_NOT_ENUM if not enumerable else 0)
+        num_fonts_added = add_font_resource_ex(byref(pathbuf), flags, 0)
+        return bool(num_fonts_added)
 
 
-# load custom font for rendering circles on the tkinter.Canvas with antialiasing
-script_directory = os.path.dirname(os.path.abspath(__file__))
-loadfont(os.path.join(script_directory, "assets", "canvas_shapes_font.otf"), private=True)
+    # load custom font for rendering circles on the tkinter.Canvas with antialiasing
+    script_directory = os.path.dirname(os.path.abspath(__file__))
+    loadfont(os.path.join(script_directory, "assets", "canvas_shapes_font.otf"), private=True)
diff --git a/customtkinter/customtkinter_dialog.py b/customtkinter/customtkinter_dialog.py
index 088d3c4..e420e96 100644
--- a/customtkinter/customtkinter_dialog.py
+++ b/customtkinter/customtkinter_dialog.py
@@ -45,6 +45,7 @@ class CTkDialog:
         self.myLabel = CTkLabel(master=self.label_frame,
                                 text=text,
                                 width=300,
+                                fg_color=None,
                                 height=self.height-100)
         self.myLabel.place(relx=0.5, rely=0.5, anchor=tkinter.CENTER)
 
@@ -68,7 +69,10 @@ class CTkDialog:
                                        hover_color=self.hover_color)
         self.cancel_button.place(relx=0.72, rely=0.65, anchor=tkinter.CENTER)
 
-    def ok_event(self):
+        self.entry.entry.focus_force()
+        self.entry.bind("<Return>", self.ok_event)
+
+    def ok_event(self, event=None):
         self.user_input = self.entry.get()
         self.running = False
 
@@ -89,14 +93,13 @@ class CTkDialog:
 
 if __name__ == "__main__":
     import customtkinter
-    customtkinter.enable_macos_darkmode()
     customtkinter.set_appearance_mode("System")
 
-    app = tkinter.Tk()
+    app = customtkinter.CTk()
     app.title("CTkDialog Test")
 
     def button_click_event():
-        dialog = CTkDialog(master=None, text="Type in a number:", title="Test", fg_color="green", hover_color="darkgreen")
+        dialog = CTkDialog(master=None, text="Type in a number:", title="Test")
         print("Number:", dialog.get_input())
 
     button = CTkButton(master=app, text="Open Dialog", command=button_click_event)
diff --git a/customtkinter/customtkinter_tk.py b/customtkinter/customtkinter_tk.py
index 1363bab..d7419d2 100644
--- a/customtkinter/customtkinter_tk.py
+++ b/customtkinter/customtkinter_tk.py
@@ -4,7 +4,6 @@ import sys
 import os
 import platform
 import ctypes
-import win32con
 
 from .appearance_mode_tracker import AppearanceModeTracker
 from .customtkinter_color_manager import CTkColorManager