--- a/dialogs/LDPowerRailDialog.py	Thu Sep 02 21:36:29 2021 +0200
+++ b/dialogs/LDPowerRailDialog.py	Thu Sep 02 22:18:14 2021 +0200
@@ -56,7 +56,7 @@
 
         # Create label for connection type
         type_label = wx.StaticText(self, label=_('Type:'))
-        self.LeftGridSizer.AddWindow(type_label, flag=wx.GROW)
+        self.LeftGridSizer.Add(type_label, flag=wx.GROW)
 
         # Create radio buttons for selecting power rail type
         self.TypeRadioButtons = {}
@@ -67,27 +67,27 @@
                                           style=(wx.RB_GROUP if first else 0))
             radio_button.SetValue(first)
             self.Bind(wx.EVT_RADIOBUTTON, self.OnTypeChanged, radio_button)
-            self.LeftGridSizer.AddWindow(radio_button, flag=wx.GROW)
+            self.LeftGridSizer.Add(radio_button, flag=wx.GROW)
             self.TypeRadioButtons[type] = radio_button
             first = False
 
         # Create label for power rail pin number
         pin_number_label = wx.StaticText(self, label=_('Pin number:'))
-        self.LeftGridSizer.AddWindow(pin_number_label, flag=wx.GROW)
+        self.LeftGridSizer.Add(pin_number_label, flag=wx.GROW)
 
         # Create spin control for defining power rail pin number
         self.PinNumber = wx.SpinCtrl(self, min=1, max=50,
                                      style=wx.SP_ARROW_KEYS)
         self.PinNumber.SetValue(1)
         self.Bind(wx.EVT_SPINCTRL, self.OnPinNumberChanged, self.PinNumber)
-        self.LeftGridSizer.AddWindow(self.PinNumber, flag=wx.GROW)
+        self.LeftGridSizer.Add(self.PinNumber, flag=wx.GROW)
 
         # Add preview panel and associated label to sizers
-        self.RightGridSizer.AddWindow(self.PreviewLabel, flag=wx.GROW)
-        self.RightGridSizer.AddWindow(self.Preview, flag=wx.GROW)
+        self.RightGridSizer.Add(self.PreviewLabel, flag=wx.GROW)
+        self.RightGridSizer.Add(self.Preview, flag=wx.GROW)
 
         # Add buttons sizer to sizers
-        self.MainSizer.AddSizer(
+        self.MainSizer.Add(
             self.ButtonSizer, border=20,
             flag=wx.ALIGN_RIGHT | wx.BOTTOM | wx.LEFT | wx.RIGHT)
         self.Fit()