diff --git a/CHANGELOG.md b/CHANGELOG.md
index d88e989..1312a89 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+ToDo:
+ - limit configuring attributes of overridden tk widgets
+ - remove bg and background support for CTk and CTkToplevel (to be done)
+ - optimize font attribute managing
+ - enforce font size in pixel
+ - enforce font to be tuple
+
 ## Unreleased - 2022-10-2
 ### Added
  - added .cget() method to all widgets and windows
diff --git a/customtkinter/widgets/ctk_button.py b/customtkinter/widgets/ctk_button.py
index 35a99e8..9b97ba2 100644
--- a/customtkinter/widgets/ctk_button.py
+++ b/customtkinter/widgets/ctk_button.py
@@ -240,9 +240,6 @@ class CTkButton(CTkBaseClass):
                                       padx=max(self._apply_widget_scaling(self._corner_radius), self._apply_widget_scaling(self._border_width)),
                                       pady=(self._apply_widget_scaling(self._border_width), 2))
 
-    def config(self, *args, **kwargs):
-        return self.configure(*args, **kwargs)
-
     def configure(self, require_redraw=False, **kwargs):
         if "text" in kwargs:
             self._text = kwargs.pop("text")
diff --git a/customtkinter/widgets/ctk_checkbox.py b/customtkinter/widgets/ctk_checkbox.py
index 11eb27b..ec2759f 100644
--- a/customtkinter/widgets/ctk_checkbox.py
+++ b/customtkinter/widgets/ctk_checkbox.py
@@ -177,9 +177,6 @@ class CTkCheckBox(CTkBaseClass):
 
         self._text_label.configure(bg=ThemeManager.single_color(self._bg_color, self._appearance_mode))
 
-    def config(self, *args, **kwargs):
-        return self.configure(*args, **kwargs)
-
     def configure(self, require_redraw=False, **kwargs):
         if "text" in kwargs:
             self._text = kwargs.pop("text")
diff --git a/customtkinter/widgets/ctk_combobox.py b/customtkinter/widgets/ctk_combobox.py
index 6cb6f77..efb7b58 100644
--- a/customtkinter/widgets/ctk_combobox.py
+++ b/customtkinter/widgets/ctk_combobox.py
@@ -175,8 +175,10 @@ class CTkComboBox(CTkBaseClass):
 
             self._entry.configure(bg=ThemeManager.single_color(self._fg_color, self._appearance_mode),
                                   fg=ThemeManager.single_color(self._text_color, self._appearance_mode),
+                                  disabledbackground=ThemeManager.single_color(self._fg_color, self._appearance_mode),
                                   disabledforeground=ThemeManager.single_color(self._text_color_disabled, self._appearance_mode),
-                                  disabledbackground=ThemeManager.single_color(self._fg_color, self._appearance_mode))
+                                  highlightcolor=ThemeManager.single_color(self._fg_color, self._appearance_mode),
+                                  insertbackground=ThemeManager.single_color(self._text_color, self._appearance_mode))
 
             if self._state == tkinter.DISABLED:
                 self._canvas.itemconfig("dropdown_arrow",
@@ -189,9 +191,6 @@ class CTkComboBox(CTkBaseClass):
         self._dropdown_menu.open(self.winfo_rootx(),
                                  self.winfo_rooty() + self._apply_widget_scaling(self._current_height + 0))
 
-    def config(self, *args, **kwargs):
-        return self.configure(*args, **kwargs)
-
     def configure(self, require_redraw=False, **kwargs):
         if "state" in kwargs:
             self._state = kwargs.pop("state")
diff --git a/customtkinter/widgets/ctk_entry.py b/customtkinter/widgets/ctk_entry.py
index 88f7d32..3ebac0e 100644
--- a/customtkinter/widgets/ctk_entry.py
+++ b/customtkinter/widgets/ctk_entry.py
@@ -6,7 +6,7 @@ from ..theme_manager import ThemeManager
 from ..draw_engine import DrawEngine
 from .widget_base_class import CTkBaseClass
 
-from .widget_helper_functions import *
+from .widget_helper_functions import pop_from_dict_by_set
 
 
 class CTkEntry(CTkBaseClass):
@@ -15,13 +15,12 @@ class CTkEntry(CTkBaseClass):
     For detailed information check out the documentation.
     """
 
+    _minimum_x_padding = 6  # minimum padding between tkinter entry and frame border
+
     # attributes that are passed to and managed by the tkinter entry only:
-    _valid_tk_entry_attributes = {"exportselection", "font", "highlightbackground",
-                                  "highlightcolor", "insertbackground", "insertborderwidth",
-                                  "insertofftime", "insertontime", "insertwidth",
-                                  "justify", "selectbackground", "selectborderwidth",
-                                  "selectforeground", "show", "takefocus", "validate",
-                                  "validatecommand", "xscrollcommand"}
+    _valid_tk_entry_attributes = {"exportselection", "insertborderwidth", "insertofftime",
+                                  "insertontime", "insertwidth", "justify", "selectborderwidth",
+                                  "show", "takefocus", "validate", "validatecommand", "xscrollcommand"}
 
     def __init__(self, *args,
                  width: int = 140,
@@ -55,22 +54,24 @@ class CTkEntry(CTkBaseClass):
         self._fg_color = ThemeManager.theme["color"]["entry"] if fg_color == "default_theme" else fg_color
         self._text_color = ThemeManager.theme["color"]["text"] if text_color == "default_theme" else text_color
         self._placeholder_text_color = ThemeManager.theme["color"]["entry_placeholder_text"] if placeholder_text_color == "default_theme" else placeholder_text_color
-        self._font = (ThemeManager.theme["text"]["font"], ThemeManager.theme["text"]["size"]) if font == "default_theme" else font
         self._border_color = ThemeManager.theme["color"]["entry_border"] if border_color == "default_theme" else border_color
 
         # shape
         self._corner_radius = ThemeManager.theme["shape"]["button_corner_radius"] if corner_radius == "default_theme" else corner_radius
         self._border_width = ThemeManager.theme["shape"]["entry_border_width"] if border_width == "default_theme" else border_width
 
-        # placeholder text
+        # text and state
+        self._font = (ThemeManager.theme["text"]["font"], ThemeManager.theme["text"]["size"]) if font == "default_theme" else font
         self._is_focused: bool = True
         self._placeholder_text = placeholder_text
         self._placeholder_text_active = False
         self._pre_placeholder_arguments = {}  # some set arguments of the entry will be changed for placeholder and then set back
-
-        # textvariable
         self._textvariable = textvariable
         self._state = state
+        self._textvariable_callback_name: str = ""
+
+        if not (self._textvariable is None or self._textvariable is ""):
+            self._textvariable_callback_name = self._textvariable.trace_add("write", self._textvariable_callback)
 
         self._canvas = CTkCanvas(master=self,
                                  highlightthickness=0,
@@ -86,10 +87,15 @@ class CTkEntry(CTkBaseClass):
                                     font=self._apply_font_scaling(self._font),
                                     state=self._state,
                                     textvariable=self._textvariable,
-                                    **filter_dict_by_set(kwargs, self._valid_tk_entry_attributes))
-        self._entry.grid(column=0, row=0, sticky="nswe",
-                         padx=self._apply_widget_scaling(self._corner_radius) if self._corner_radius >= 6 else self._apply_widget_scaling(6),
-                         pady=(self._apply_widget_scaling(self._border_width), self._apply_widget_scaling(self._border_width + 1)))
+                                    **pop_from_dict_by_set(kwargs, self._valid_tk_entry_attributes))
+        if self._corner_radius >= self._minimum_x_padding:
+            self._entry.grid(column=0, row=0, sticky="nswe", padx=min(self._apply_widget_scaling(self._corner_radius), self._current_height),
+                             pady=(self._apply_widget_scaling(self._border_width), self._apply_widget_scaling(self._border_width + 1)))
+        else:
+            self._entry.grid(column=0, row=0, sticky="nswe", padx=self._apply_widget_scaling(self._minimum_x_padding),
+                             pady=(self._apply_widget_scaling(self._border_width), self._apply_widget_scaling(self._border_width + 1)))
+
+        self._check_kwargs_empty(kwargs, raise_error=True)
 
         super().bind('<Configure>', self._update_dimensions_event)
         self._entry.bind('<FocusOut>', self._entry_focus_out)
@@ -98,6 +104,10 @@ class CTkEntry(CTkBaseClass):
         self._activate_placeholder()
         self._draw()
 
+    def _textvariable_callback(self, var_name, index, mode):
+        if self._textvariable.get() == "":
+            self._activate_placeholder()
+
     def _set_scaling(self, *args, **kwargs):
         super()._set_scaling(*args, **kwargs)
 
@@ -129,20 +139,20 @@ class CTkEntry(CTkBaseClass):
                                         fill=ThemeManager.single_color(self._fg_color, self._appearance_mode),
                                         outline=ThemeManager.single_color(self._fg_color, self._appearance_mode))
                 self._entry.configure(bg=ThemeManager.single_color(self._fg_color, self._appearance_mode),
-                                      disabledbackground=ThemeManager.single_color(self._fg_color, self._appearance_mode),
-                                      highlightcolor=ThemeManager.single_color(self._fg_color, self._appearance_mode),
                                       fg=ThemeManager.single_color(self._text_color, self._appearance_mode),
+                                      disabledbackground=ThemeManager.single_color(self._fg_color, self._appearance_mode),
                                       disabledforeground=ThemeManager.single_color(self._text_color, self._appearance_mode),
+                                      highlightcolor=ThemeManager.single_color(self._fg_color, self._appearance_mode),
                                       insertbackground=ThemeManager.single_color(self._text_color, self._appearance_mode))
             else:
                 self._canvas.itemconfig("inner_parts",
                                         fill=ThemeManager.single_color(self._bg_color, self._appearance_mode),
                                         outline=ThemeManager.single_color(self._bg_color, self._appearance_mode))
                 self._entry.configure(bg=ThemeManager.single_color(self._bg_color, self._appearance_mode),
-                                      disabledbackground=ThemeManager.single_color(self._bg_color, self._appearance_mode),
-                                      highlightcolor=ThemeManager.single_color(self._bg_color, self._appearance_mode),
                                       fg=ThemeManager.single_color(self._text_color, self._appearance_mode),
+                                      disabledbackground=ThemeManager.single_color(self._bg_color, self._appearance_mode),
                                       disabledforeground=ThemeManager.single_color(self._text_color, self._appearance_mode),
+                                      highlightcolor=ThemeManager.single_color(self._bg_color, self._appearance_mode),
                                       insertbackground=ThemeManager.single_color(self._text_color, self._appearance_mode))
 
             self._canvas.itemconfig("border_parts",
@@ -152,12 +162,7 @@ class CTkEntry(CTkBaseClass):
             if self._placeholder_text_active:
                 self._entry.config(fg=ThemeManager.single_color(self._placeholder_text_color, self._appearance_mode))
 
-    def config(self, *args, **kwargs):
-        return self.configure(*args, **kwargs)
-
     def configure(self, require_redraw=False, **kwargs):
-        self._entry.configure(**filter_dict_by_set(kwargs, self._valid_tk_entry_attributes))
-
         if "state" in kwargs:
             self._state = kwargs.pop("state")
             self._entry.configure(state=self._state)
@@ -174,15 +179,16 @@ class CTkEntry(CTkBaseClass):
             self._border_color = kwargs.pop("border_color")
             require_redraw = True
 
+        if "border_width" in kwargs:
+            self._border_width = kwargs.pop("border_width")
+            require_redraw = True
+
         if "corner_radius" in kwargs:
             self._corner_radius = kwargs.pop("corner_radius")
-
-            if self._corner_radius * 2 > self._current_height:
-                self._corner_radius = self._current_height / 2
-            elif self._corner_radius * 2 > self._current_width:
-                self._corner_radius = self._current_width / 2
-
-            self._entry.grid(column=0, row=0, sticky="we", padx=self._apply_widget_scaling(self._corner_radius) if self._corner_radius >= 6 else self._apply_widget_scaling(6))
+            if self._corner_radius >= self._minimum_x_padding:
+                self._entry.grid(column=0, row=0, sticky="we", padx=min(self._apply_widget_scaling(self._corner_radius), self._current_height / 2))
+            else:
+                self._entry.grid(column=0, row=0, sticky="we", padx=self._apply_widget_scaling(self._minimum_x_padding))
             require_redraw = True
 
         if "width" in kwargs:
@@ -213,11 +219,12 @@ class CTkEntry(CTkBaseClass):
 
         if "show" in kwargs:
             if self._placeholder_text_active:
-                self._pre_placeholder_arguments["show"] = kwargs.pop("show")
+                self._pre_placeholder_arguments["show"] = kwargs.pop("show")  # remember show argument for when placeholder gets deactivated
             else:
                 self._entry.configure(show=kwargs.pop("show"))
 
-        super().configure(require_redraw=require_redraw, **kwargs)
+        self._entry.configure(**pop_from_dict_by_set(kwargs, self._valid_tk_entry_attributes))  # configure Tkinter.Entry
+        super().configure(require_redraw=require_redraw, **kwargs)  # configure CTkBaseClass
 
     def cget(self, attribute_name: str) -> any:
         if attribute_name == "corner_radius":
@@ -238,22 +245,18 @@ class CTkEntry(CTkBaseClass):
             return self._textvariable
         elif attribute_name == "placeholder_text":
             return self._placeholder_text
-        elif attribute_name == "text_font":
+        elif attribute_name == "font":
             return self._font
         elif attribute_name == "state":
             return self._state
 
-        elif attribute_name in ["exportselection", "font", "highlightbackground",
-                                "highlightcolor", "insertbackground",
-                                "insertborderwidth", "insertofftime", "insertontime",
-                                "insertwidth", "justify", "selectbackground",
-                                "selectborderwidth", "selectforeground", "show",
-                                "takefocus", "validate", "validatecommand",
-                                "xscrollcommand"]:
-            return self._entry.cget(attribute_name)
+        elif attribute_name in self._valid_tk_entry_attributes:
+            return self._entry.cget(attribute_name)  # cget of tkinter.Entry
+        else:
+            return super().cget(attribute_name)
 
-    def bind(self, *args, **kwargs):
-        self._entry.bind(*args, **kwargs)
+    def bind(self, sequence=None, command=None, add=None):
+        self._entry.bind(sequence, command, add)
 
     def _activate_placeholder(self):
         if self._entry.get() == "" and self._placeholder_text is not None and (self._textvariable is None or self._textvariable == ""):
@@ -281,16 +284,16 @@ class CTkEntry(CTkBaseClass):
         self._deactivate_placeholder()
         self._is_focused = True
 
-    def delete(self, *args, **kwargs):
-        self._entry.delete(*args, **kwargs)
+    def delete(self, first_index, last_index=None):
+        self._entry.delete(first_index, last_index)
 
         if not self._is_focused and self._entry.get() == "":
             self._activate_placeholder()
 
-    def insert(self, *args, **kwargs):
+    def insert(self, index, string):
         self._deactivate_placeholder()
 
-        return self._entry.insert(*args, **kwargs)
+        return self._entry.insert(index, string)
 
     def get(self):
         if self._placeholder_text_active:
@@ -299,7 +302,40 @@ class CTkEntry(CTkBaseClass):
             return self._entry.get()
 
     def focus(self):
-        self._entry.focus()
+        return self._entry.focus()
 
     def focus_force(self):
-        self._entry.focus_force()
+        return self._entry.focus_force()
+
+    def index(self, index):
+        return self._entry.index(index)
+
+    def icursor(self, index):
+        return self._entry.icursor(index)
+
+    def select_adjust(self, index):
+        return self._entry.select_adjust(index)
+
+    def select_from(self, index):
+        return self._entry.icursor(index)
+
+    def select_clear(self):
+        return self._entry.select_clear()
+
+    def select_present(self):
+        return self._entry.select_present()
+
+    def select_range(self, start_index, end_index):
+        return self._entry.select_range(start_index, end_index)
+
+    def select_to(self, index):
+        return self._entry.select_to(index)
+
+    def xview(self, index):
+        return self._entry.xview(index)
+
+    def xview_moveto(self, f):
+        return self._entry.xview_moveto(f)
+
+    def xview_scroll(self, number, what):
+        return self._entry.xview_scroll(number, what)
diff --git a/customtkinter/widgets/ctk_frame.py b/customtkinter/widgets/ctk_frame.py
index 014d428..0fe4f3e 100644
--- a/customtkinter/widgets/ctk_frame.py
+++ b/customtkinter/widgets/ctk_frame.py
@@ -114,9 +114,6 @@ class CTkFrame(CTkBaseClass):
         self._canvas.tag_lower("inner_parts")
         self._canvas.tag_lower("border_parts")
 
-    def config(self, *args, **kwargs):
-        return self.configure(*args, **kwargs)
-
     def configure(self, require_redraw=False, **kwargs):
         if "fg_color" in kwargs:
             self._fg_color = kwargs.pop("fg_color")
diff --git a/customtkinter/widgets/ctk_label.py b/customtkinter/widgets/ctk_label.py
index cbad9d3..e9cf1c5 100644
--- a/customtkinter/widgets/ctk_label.py
+++ b/customtkinter/widgets/ctk_label.py
@@ -115,9 +115,6 @@ class CTkLabel(CTkBaseClass):
 
             self._canvas.configure(bg=ThemeManager.single_color(self._bg_color, self._appearance_mode))
 
-    def config(self, *args, **kwargs):
-        return self.configure(*args, **kwargs)
-
     def configure(self, require_redraw=False, **kwargs):
         if "anchor" in kwargs:
             self._anchor = kwargs.pop("anchor")
diff --git a/customtkinter/widgets/ctk_optionmenu.py b/customtkinter/widgets/ctk_optionmenu.py
index da58acd..34f9aae 100644
--- a/customtkinter/widgets/ctk_optionmenu.py
+++ b/customtkinter/widgets/ctk_optionmenu.py
@@ -193,9 +193,6 @@ class CTkOptionMenu(CTkBaseClass):
 
         self._canvas.update_idletasks()
 
-    def config(self, *args, **kwargs):
-        return self.configure(*args, **kwargs)
-
     def configure(self, require_redraw=False, **kwargs):
         if "state" in kwargs:
             self._state = kwargs.pop("state")
diff --git a/customtkinter/widgets/ctk_progressbar.py b/customtkinter/widgets/ctk_progressbar.py
index 6a41af9..b59c112 100644
--- a/customtkinter/widgets/ctk_progressbar.py
+++ b/customtkinter/widgets/ctk_progressbar.py
@@ -152,9 +152,6 @@ class CTkProgressBar(CTkBaseClass):
                                     fill=ThemeManager.single_color(self._progress_color, self._appearance_mode),
                                     outline=ThemeManager.single_color(self._progress_color, self._appearance_mode))
 
-    def config(self, *args, **kwargs):
-        return self.configure(*args, **kwargs)
-
     def configure(self, require_redraw=False, **kwargs):
         if "fg_color" in kwargs:
             self._fg_color = kwargs.pop("fg_color")
diff --git a/customtkinter/widgets/ctk_radiobutton.py b/customtkinter/widgets/ctk_radiobutton.py
index 3768da2..00b8faa 100644
--- a/customtkinter/widgets/ctk_radiobutton.py
+++ b/customtkinter/widgets/ctk_radiobutton.py
@@ -158,9 +158,6 @@ class CTkRadioButton(CTkBaseClass):
 
         self._text_label.configure(bg=ThemeManager.single_color(self._bg_color, self._appearance_mode))
 
-    def config(self, *args, **kwargs):
-        return self.configure(*args, **kwargs)
-
     def configure(self, require_redraw=False, **kwargs):
         if "text" in kwargs:
             self._text = kwargs.pop("text")
diff --git a/customtkinter/widgets/ctk_scrollbar.py b/customtkinter/widgets/ctk_scrollbar.py
index 65582a7..6b31e44 100644
--- a/customtkinter/widgets/ctk_scrollbar.py
+++ b/customtkinter/widgets/ctk_scrollbar.py
@@ -150,9 +150,6 @@ class CTkScrollbar(CTkBaseClass):
 
         self._canvas.update_idletasks()
 
-    def config(self, *args, **kwargs):
-        return self.configure(*args, **kwargs)
-
     def configure(self, require_redraw=False, **kwargs):
         if "fg_color" in kwargs:
             self._fg_color = kwargs.pop("fg_color")
diff --git a/customtkinter/widgets/ctk_slider.py b/customtkinter/widgets/ctk_slider.py
index 60913b3..186b81c 100644
--- a/customtkinter/widgets/ctk_slider.py
+++ b/customtkinter/widgets/ctk_slider.py
@@ -190,9 +190,6 @@ class CTkSlider(CTkBaseClass):
                                         fill=ThemeManager.single_color(self._button_color, self._appearance_mode),
                                         outline=ThemeManager.single_color(self._button_color, self._appearance_mode))
 
-    def config(self, *args, **kwargs):
-        return self.configure(*args, **kwargs)
-
     def configure(self, require_redraw=False, **kwargs):
         if "state" in kwargs:
             self._state = kwargs.pop("state")
diff --git a/customtkinter/widgets/ctk_switch.py b/customtkinter/widgets/ctk_switch.py
index 77dbf57..f76e929 100644
--- a/customtkinter/widgets/ctk_switch.py
+++ b/customtkinter/widgets/ctk_switch.py
@@ -207,9 +207,6 @@ class CTkSwitch(CTkBaseClass):
 
         self._text_label.configure(bg=ThemeManager.single_color(self._bg_color, self._appearance_mode))
 
-    def config(self, *args, **kwargs):
-        return self.configure(*args, **kwargs)
-
     def configure(self, require_redraw=False, **kwargs):
         if "text" in kwargs:
             self._text = kwargs.pop("text")
diff --git a/customtkinter/widgets/ctk_textbox.py b/customtkinter/widgets/ctk_textbox.py
index bcd28a1..fae123c 100644
--- a/customtkinter/widgets/ctk_textbox.py
+++ b/customtkinter/widgets/ctk_textbox.py
@@ -118,9 +118,6 @@ class CTkTextbox(CTkBaseClass):
         self._canvas.tag_lower("inner_parts")
         self._canvas.tag_lower("border_parts")
 
-    def config(self, *args, **kwargs):
-        return self.configure(*args, **kwargs)
-
     def configure(self, require_redraw=False, **kwargs):
         if "fg_color" in kwargs:
             self._fg_color = kwargs.pop("fg_color")
diff --git a/customtkinter/widgets/dropdown_menu.py b/customtkinter/widgets/dropdown_menu.py
index 5a07970..47ca648 100644
--- a/customtkinter/widgets/dropdown_menu.py
+++ b/customtkinter/widgets/dropdown_menu.py
@@ -105,9 +105,6 @@ class DropdownMenu(tkinter.Menu):
         else:  # Linux
             self.tk_popup(int(x), int(y))
 
-    def config(self, **kwargs):
-        return self.configure(**kwargs)
-
     def configure(self, **kwargs):
         if "fg_color" in kwargs:
             self._fg_color = kwargs.pop("fg_color")
diff --git a/customtkinter/widgets/widget_base_class.py b/customtkinter/widgets/widget_base_class.py
index fafa29a..f167013 100644
--- a/customtkinter/widgets/widget_base_class.py
+++ b/customtkinter/widgets/widget_base_class.py
@@ -15,7 +15,7 @@ from ..appearance_mode_tracker import AppearanceModeTracker
 from ..scaling_tracker import ScalingTracker
 from ..theme_manager import ThemeManager
 
-from .widget_helper_functions import filter_dict_by_set
+from .widget_helper_functions import pop_from_dict_by_set
 
 
 class CTkBaseClass(tkinter.Frame):
@@ -23,7 +23,7 @@ class CTkBaseClass(tkinter.Frame):
         appearance_mode changes, scaling, bg changes of master if master is not a CTk widget """
 
     # attributes that are passed to and managed by the tkinter frame only:
-    _valid_tk_frame_attributes = {"cursor"}
+    _valid_tk_frame_attributes = {"cursor", "master"}
 
     def __init__(self, *args,
                  width: int,
@@ -32,7 +32,10 @@ class CTkBaseClass(tkinter.Frame):
                  bg_color: Union[str, tuple] = None,
                  **kwargs):
 
-        super().__init__(*args, width=width, height=height, **kwargs)  # set desired size of underlying tkinter.Frame
+        super().__init__(*args, width=width, height=height, **pop_from_dict_by_set(kwargs, self._valid_tk_frame_attributes))
+
+        # check if kwargs is empty, if not raise error for unsupported arguments
+        self._check_kwargs_empty(kwargs, raise_error=True)
 
         # dimensions
         self._current_width = width  # _current_width and _current_height in pixel, represent current size of the widget
@@ -85,6 +88,18 @@ class CTkBaseClass(tkinter.Frame):
             self.master.config = new_configure
             self.master.configure = new_configure
 
+    @staticmethod
+    def _check_kwargs_empty(kwargs_dict, raise_error=False) -> bool:
+        """ returns True if kwargs are empty, False otherwise, raises error if not empty """
+
+        if len(kwargs_dict) > 0:
+            if raise_error:
+                raise ValueError(f"{list(kwargs_dict.keys())} are not supported arguments. Look at the documentation for supported arguments.")
+            else:
+                return True
+        else:
+            return False
+
     def destroy(self):
         AppearanceModeTracker.remove(self._set_appearance_mode)
         super().destroy()
@@ -127,10 +142,10 @@ class CTkBaseClass(tkinter.Frame):
         pass
 
     def config(self, *args, **kwargs):
-        return self.configure(*args, **kwargs)
+        raise AttributeError("'config' is not implemented for CTk widgets. For consistency, always use 'configure' instead.")
 
     def configure(self, require_redraw=False, **kwargs):
-        """ basic configure with _bg_color support, to be overridden """
+        """ basic configure with bg_color support, calls configure of tkinter.Frame, calls draw() in the end """
 
         if "bg_color" in kwargs:
             new_bg_color = kwargs.pop("bg_color")
@@ -140,21 +155,28 @@ class CTkBaseClass(tkinter.Frame):
                 self._bg_color = new_bg_color
             require_redraw = True
 
-        super().configure(**filter_dict_by_set(kwargs, self._valid_tk_frame_attributes))
+        super().configure(**pop_from_dict_by_set(kwargs, self._valid_tk_frame_attributes))  # configure tkinter.Frame
+
+        # if there are still items in the kwargs dict, raise ValueError
+        self._check_kwargs_empty(kwargs, raise_error=True)
 
         if require_redraw:
             self._draw()
 
-    def cget(self, key: str):
-        if key == "bg_color":
+    def cget(self, attribute_name: str):
+        """ basic cget with bg_color, width, height support, calls cget of tkinter.Frame """
+
+        if attribute_name == "bg_color":
             return self._bg_color
-        elif key == "width":
+        elif attribute_name == "width":
             return self._desired_width
-        elif key == "height":
+        elif attribute_name == "height":
             return self._desired_height
 
-        elif key in self._valid_tk_frame_attributes:
-            return super().cget(key)
+        elif attribute_name in self._valid_tk_frame_attributes:
+            return super().cget(attribute_name)  # cget of tkinter.Frame
+        else:
+            raise ValueError(f"'{attribute_name}' is not a supported argument. Look at the documentation for supported arguments.")
 
     def _update_dimensions_event(self, event):
         # only redraw if dimensions changed (for performance), independent of scaling
diff --git a/customtkinter/widgets/widget_helper_functions.py b/customtkinter/widgets/widget_helper_functions.py
index 85b813e..e2cf7fa 100644
--- a/customtkinter/widgets/widget_helper_functions.py
+++ b/customtkinter/widgets/widget_helper_functions.py
@@ -1,7 +1,7 @@
 
 
 def filter_dict_by_set(dictionary: dict, valid_keys: set):
-    """ remove all key value pairs, where key is not in valid_keys set """
+    """ create new dict with key value pairs of dictionary, where key is in valid_keys """
     new_dictionary = {}
 
     for key, value in dictionary.items():
@@ -9,3 +9,14 @@ def filter_dict_by_set(dictionary: dict, valid_keys: set):
             new_dictionary[key] = value
 
     return new_dictionary
+
+
+def pop_from_dict_by_set(dictionary: dict, valid_keys: set):
+    """ remove and create new dict with key value pairs of dictionary, where key is in valid_keys """
+    new_dictionary = {}
+
+    for key in list(dictionary.keys()):
+        if key in valid_keys:
+            new_dictionary[key] = dictionary.pop(key)
+
+    return new_dictionary
diff --git a/customtkinter/windows/ctk_input_dialog.py b/customtkinter/windows/ctk_input_dialog.py
index af9f08d..ade590e 100644
--- a/customtkinter/windows/ctk_input_dialog.py
+++ b/customtkinter/windows/ctk_input_dialog.py
@@ -17,7 +17,7 @@ class CTkInputDialog:
     For detailed information check out the documentation.
     """
 
-    def __init__(self,
+    def __init__(self, *args,
                  fg_color: Union[str, Tuple[str, str]] = "default_theme",
                  hover_color: Union[str, Tuple[str, str]] = "default_theme",
                  border_color: Union[str, Tuple[str, str]] = "default_theme",
@@ -27,7 +27,13 @@ class CTkInputDialog:
                  text: str = "CTkDialog"):
 
         self._appearance_mode = AppearanceModeTracker.get_mode()  # 0: "Light" 1: "Dark"
-        self.master = master
+
+        if len(args) > 0 and master is None:
+            self.master = args[0]
+        elif master is not None:
+            self.master = master
+        else:
+            raise ValueError("master argument is missing")
 
         self._window_bg_color = ThemeManager.theme["color"]["window_bg_color"]
         self._fg_color = ThemeManager.theme["color"]["button"] if fg_color == "default_theme" else fg_color
@@ -39,14 +45,15 @@ class CTkInputDialog:
         self._height: int = len(text.split("\n")) * 20 + 150
         self._text = text
 
-        self._toplevel_window = CTkToplevel()
+        self._toplevel_window = CTkToplevel(self.master)
         self._toplevel_window.geometry(f"{280}x{self._height}")
         self._toplevel_window.minsize(280, self._height)
         self._toplevel_window.maxsize(280, self._height)
         self._toplevel_window.title(title)
-        self._toplevel_window.lift()
         self._toplevel_window.focus_force()
-        self._toplevel_window.grab_set()
+        self._toplevel_window.grab_set()  # make other windows not clickable
+        self._toplevel_window.lift()  # lift window on top
+        self._toplevel_window.attributes("-topmost", True)  # stay on top
         self._toplevel_window.protocol("WM_DELETE_WINDOW", self._on_closing)
         self._toplevel_window.after(10, self._create_widgets)  # create widgets with slight delay, to avoid white flickering of background
 
@@ -99,25 +106,17 @@ class CTkInputDialog:
 
     def _ok_event(self, event=None):
         self._user_input = self._entry.get()
-        self._running = False
+        self._toplevel_window.grab_release()
+        self._toplevel_window.destroy()
 
     def _on_closing(self):
-        self._running = False
+        self._toplevel_window.grab_release()
+        self._toplevel_window.destroy()
 
     def _cancel_event(self):
-        self._running = False
+        self._toplevel_window.grab_release()
+        self._toplevel_window.destroy()
 
     def get_input(self):
-        self._running = True
-
-        while self._running:
-            try:
-                self._toplevel_window.update()
-            except Exception:
-                return self._user_input
-            finally:
-                time.sleep(0.01)
-
-        time.sleep(0.05)
-        self._toplevel_window.destroy()
+        self.master.wait_window(self._toplevel_window)
         return self._user_input
diff --git a/customtkinter/windows/ctk_tk.py b/customtkinter/windows/ctk_tk.py
index 0055e97..0988c77 100644
--- a/customtkinter/windows/ctk_tk.py
+++ b/customtkinter/windows/ctk_tk.py
@@ -142,9 +142,9 @@ class CTk(tkinter.Tk):
 
         super().mainloop(*args, **kwargs)
 
-    def resizable(self, *args, **kwargs):
-        super().resizable(*args, **kwargs)
-        self._last_resizable_args = (args, kwargs)
+    def resizable(self, width: bool = None, height: bool = None):
+        super().resizable(width, height)
+        self._last_resizable_args = ([], {"width": width, "height": height})
 
         if sys.platform.startswith("win"):
             if self._appearance_mode == 1:
@@ -225,9 +225,6 @@ class CTk(tkinter.Tk):
         else:
             return value
 
-    def config(self, *args, **kwargs):
-        self.configure(*args, **kwargs)
-
     def configure(self, *args, **kwargs):
         bg_changed = False
 
diff --git a/customtkinter/windows/ctk_toplevel.py b/customtkinter/windows/ctk_toplevel.py
index 55cc5ef..fdda6c6 100644
--- a/customtkinter/windows/ctk_toplevel.py
+++ b/customtkinter/windows/ctk_toplevel.py
@@ -161,9 +161,9 @@ class CTkToplevel(tkinter.Toplevel):
             self._iconify_called_after_windows_set_titlebar_color = True
         super().iconify()
 
-    def resizable(self, *args, **kwargs):
-        super().resizable(*args, **kwargs)
-        self._last_resizable_args = (args, kwargs)
+    def resizable(self, width: bool = None, height: bool = None):
+        super().resizable(width, height)
+        self._last_resizable_args = ([], {"width": width, "height": height})
 
         if sys.platform.startswith("win"):
             if self._appearance_mode == 1:
@@ -189,9 +189,6 @@ class CTkToplevel(tkinter.Toplevel):
             self._current_height = height
         super().maxsize(self._apply_window_scaling(self._max_width), self._apply_window_scaling(self._max_height))
 
-    def config(self, *args, **kwargs):
-        self.configure(*args, **kwargs)
-
     def configure(self, *args, **kwargs):
         bg_changed = False
 
diff --git a/test/manual_integration_tests/complex_example_new.py b/test/manual_integration_tests/complex_example_new.py
index 1a9f307..7779477 100644
--- a/test/manual_integration_tests/complex_example_new.py
+++ b/test/manual_integration_tests/complex_example_new.py
@@ -13,6 +13,8 @@ class App(customtkinter.CTk):
 
         self.title("CustomTkinter complex_example.py")
         self.geometry(f"{920}x{500}")
+        self.minsize(700, 400)
+        self.maxsize(1200, 700)
         self.protocol("WM_DELETE_WINDOW", self.on_closing)  # call .on_closing() when app gets closed
 
         # configure grid layout (4x4)
@@ -126,7 +128,7 @@ class App(customtkinter.CTk):
         self.progressbar_1.start()
 
     def open_input_dialog(self):
-        dialog = customtkinter.CTkInputDialog(master=None, text="Type in a number:", title="CTkInputDialog")
+        dialog = customtkinter.CTkInputDialog(master=self, text="Type in a number:", title="CTkInputDialog")
         print("CTkInputDialog:", dialog.get_input())
 
     def change_appearance_mode(self, new_appearance_mode: str):
@@ -139,10 +141,8 @@ class App(customtkinter.CTk):
 
     def sidebar_button_callback(self):
         print("sidebar_button click")
-
         self.entry.delete(0, tkinter.END)
 
-
     def on_closing(self, event=0):
         self.destroy()
 
diff --git a/test/unit_tests/test_ctk.py b/test/unit_tests/test_ctk.py
index ab0d801..5920909 100644
--- a/test/unit_tests/test_ctk.py
+++ b/test/unit_tests/test_ctk.py
@@ -76,14 +76,14 @@ class TestCTk():
     def test_configure(self):
         print(" -> test_configure: ", end="")
         self.root_ctk.configure(bg="white")
-        assert self.root_ctk.fg_color == "white"
+        assert self.root_ctk.cget("fg_color") == "white"
 
         self.root_ctk.configure(background="red")
-        assert self.root_ctk.fg_color == "red"
+        assert self.root_ctk.cget("fg_color") == "red"
         assert self.root_ctk.cget("bg") == "red"
 
         self.root_ctk.config(fg_color=("green", "#FFFFFF"))
-        assert self.root_ctk.fg_color == ("green", "#FFFFFF")
+        assert self.root_ctk.cget("fg_color") == ("green", "#FFFFFF")
         print("successful")
 
     def test_appearance_mode(self):
diff --git a/test/unit_tests/test_ctk_entry.py b/test/unit_tests/test_ctk_entry.py
new file mode 100644
index 0000000..5c14c9a
--- /dev/null
+++ b/test/unit_tests/test_ctk_entry.py
@@ -0,0 +1,55 @@
+import customtkinter
+import time
+
+app = customtkinter.CTk()
+
+entry_1 = customtkinter.CTkEntry(app, width=100, height=25)
+entry_1.pack(padx=20, pady=20)
+entry_2 = customtkinter.CTkEntry(app, width=100, height=25)
+entry_2.pack(padx=20, pady=20)
+
+txt_var = customtkinter.StringVar(value="test")
+
+entry_1.configure(width=300,
+                  height=35,
+                  corner_radius=1000,
+                  border_width=4,
+                  bg_color="green",
+                  fg_color=("red", "yellow"),
+                  border_color="blue",
+                  text_color=("brown", "green"),
+                  placeholder_text_color="blue",
+                  textvariable=txt_var,
+                  placeholder_text="new_placholder",
+                  font=("Times New Roman", -8, "bold"),
+                  state="normal",
+                  insertborderwidth=5,
+                  insertwidth=10,
+                  justify="right",
+                  show="+")
+
+assert entry_1.cget("width") == 300
+assert entry_1.cget("height") == 35
+assert entry_1.cget("corner_radius") == 1000
+assert entry_1.cget("border_width") == 4
+assert entry_1.cget("bg_color") == "green"
+assert entry_1.cget("fg_color") == ("red", "yellow")
+assert entry_1.cget("border_color") == "blue"
+assert entry_1.cget("text_color") == ("brown", "green")
+assert entry_1.cget("placeholder_text_color") == "blue"
+assert entry_1.cget("textvariable") == txt_var
+assert entry_1.cget("placeholder_text") == "new_placholder"
+assert entry_1.cget("font") == ("Times New Roman", -8, "bold")
+assert entry_1.cget("state") == "normal"
+assert entry_1.cget("insertborderwidth") == 5
+assert entry_1.cget("insertwidth") == 10
+assert entry_1.cget("justify") == "right"
+# assert entry_1.cget("show") == "+"  # somehow does not work, maybe a tkinter bug?
+
+def test_textvariable():
+    txt_var.set("test_2")
+    print(entry_1.get())
+    assert entry_1.get() == "test_2"
+
+app.after(500, test_textvariable)
+app.mainloop()