diff --git a/lib/wx/core/choicedlg.rb b/lib/wx/core/choicedlg.rb
index dacf5308..8bcb8536 100644
--- a/lib/wx/core/choicedlg.rb
+++ b/lib/wx/core/choicedlg.rb
@@ -14,9 +14,8 @@ def self.get_single_choice(message,
                              choices,
                              parent = nil,
                              initial_selection: 0,
-                             x:  Wx::DEFAULT_COORD,
-                             y:  Wx::DEFAULT_COORD)
-    dialog = Wx::SingleChoiceDialog.new(parent, message, caption, choices, nil, Wx::CHOICEDLG_STYLE, [x, y])
+                             pos:  Wx::DEFAULT_POSITION)
+    dialog = Wx::SingleChoiceDialog.new(parent, message, caption, choices, Wx::CHOICEDLG_STYLE, pos)
 
     dialog.selection = initial_selection
     return dialog.show_modal == Wx::ID_OK ? dialog.get_string_selection : ''
@@ -28,9 +27,8 @@ def self.get_single_choice_index(message,
                                    choices,
                                    parent = nil,
                                    initial_selection: 0,
-                                   x:  Wx::DEFAULT_COORD,
-                                   y:  Wx::DEFAULT_COORD)
-    dialog = Wx::SingleChoiceDialog.new(parent, message, caption, choices, nil, Wx::CHOICEDLG_STYLE, [x, y])
+                                   pos:  Wx::DEFAULT_POSITION)
+    dialog = Wx::SingleChoiceDialog.new(parent, message, caption, choices, Wx::CHOICEDLG_STYLE, pos)
 
     dialog.selection = initial_selection
     return dialog.show_modal == Wx::ID_OK ? dialog.get_selection : -1
@@ -43,16 +41,15 @@ def self.get_selected_choices(message,
                                 choices,
                                 parent = nil,
                                 initial_selections: [],
-                                x:  Wx::DEFAULT_COORD,
-                                y:  Wx::DEFAULT_COORD)
-    dialog = Wx::MultiChoiceDialog.new(parent, message, caption, choices, Wx::CHOICEDLG_STYLE, [x, y])
+                                pos:  Wx::DEFAULT_POSITION)
+    dialog = Wx::MultiChoiceDialog.new(parent, message, caption, choices, Wx::CHOICEDLG_STYLE, pos)
 
     # call this even if selections array is empty and this then (correctly)
     # deselects the first item which is selected by default
     dialog.selections = initial_selections
 
     if dialog.show_modal != Wx::ID_OK
-      return []
+      return nil
     end
 
     dialog.get_selections
diff --git a/lib/wx/doc/functions.rb b/lib/wx/doc/functions.rb
index 33fe562e..666819a9 100644
--- a/lib/wx/doc/functions.rb
+++ b/lib/wx/doc/functions.rb
@@ -158,9 +158,41 @@ def self.get_mouse_state; end
   # @!group Dialog shortcuts
 
   # @return [Array<Integer>] Selected choices
-  def self.get_selected_choices(message, caption, choices,
-                                parent = nil, x = Wx::DEFAULT_COORD, y = Wx::DEFAULT_COORD,
-                                centre = true, width = Wx::CHOICE_WIDTH, height = Wx::CHOICE_HEIGHT) end
+
+  # Get the user selection as a string.
+  # @param [String] message
+  # @param [String] caption
+  # @param [Array<String>] choices choice strings
+  # @param [Wx::Window,nil] parent
+  # @param [Integer] initial_selection initial choice index
+  # @param [Wx::Point,Array(Integer,Integer)] pos
+  # @return [String] selected choice or '' if cancelled
+  def self.get_single_choice(message, caption, choices, parent = nil,
+                             initial_selection: 0,
+                             pos:  Wx::DEFAULT_POSITION) end
+
+  # Get the user selection as an index.
+  # @param [String] message
+  # @param [String] caption
+  # @param [Array<String>] choices choice strings
+  # @param [Wx::Window,nil] parent
+  # @param [Integer] initial_selection
+  # @param [Wx::Point,Array(Integer,Integer)] pos
+  # @return [Integer] selected choice index or -1 if cancelled
+  def self.get_single_choice_index(message, caption, choices, parent = nil,
+                                   initial_selection: 0,
+                                   pos:  Wx::DEFAULT_POSITION) end
+
+  # @param [String] message
+  # @param [String] caption
+  # @param [Array<String>] choices choice strings
+  # @param [Wx::Window,nil] parent
+  # @param [Array<Integer>] initial_selections array of initial choice indexes
+  # @param [Wx::Point,Array(Integer,Integer)] pos
+  # @return [Array<Integer>,nil] selected choice indexes (can be empty array if none selected) or nil if cancelled
+  def self.get_selected_choices(message, caption, choices, parent = nil,
+                                initial_selections: [],
+                                pos:  Wx::DEFAULT_POSITION) end
 
   # Pops up a file selector box.
   #
diff --git a/rakelib/lib/director/dialog.rb b/rakelib/lib/director/dialog.rb
index e517b4e9..a6c01d30 100644
--- a/rakelib/lib/director/dialog.rb
+++ b/rakelib/lib/director/dialog.rb
@@ -144,13 +144,6 @@ def setup
         when 'wxMultiChoiceDialog'
           # unnneeded and unwanted for Ruby
           spec.ignore 'wxMultiChoiceDialog::wxMultiChoiceDialog(wxWindow *,const wxString &,const wxString &,int,const wxString *,long,const wxPoint &)'
-          # Wx's MultiChoiceDialog offers the possibility of attaching client
-          # data to each choice. However this would need memory management, and a
-          # pure ruby implementation is trivial and likely to be more convenient
-          # on a per-case basis so just ignore this argument for Ruby.
-          spec.map 'char** clientData' do
-            map_in ignore: true, code: '$1 = (char **)NULL;'
-          end
           spec.do_not_generate(:functions, :enums, :defines)
         when 'wxDirDialog'
         when 'wxProgressDialog'
diff --git a/rakelib/lib/director/functions.rb b/rakelib/lib/director/functions.rb
index 4e161085..62b72319 100644
--- a/rakelib/lib/director/functions.rb
+++ b/rakelib/lib/director/functions.rb
@@ -208,18 +208,6 @@ def setup
           wxWindow * wxGetActiveWindow();
           
           // Dialog shortcuts
-          VOID_INT wxGetSelectedChoices(wxArrayInt& selections,
-                        const wxString& message,
-                        const wxString& caption,
-                        int n, const wxString *choices,
-                        wxWindow *parent = NULL,
-                        int x = wxDefaultCoord,
-                        int y = wxDefaultCoord,
-                        bool centre = true,
-                        int width = wxCHOICE_WIDTH,
-                        int height = wxCHOICE_HEIGHT);
-          
-          
           wxString wxFileSelector (const wxString &message,
                                    const wxString &default_path=wxEmptyString,
                                    const wxString &default_filename=wxEmptyString,