diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 66f116a7f6189..b37d9b0f1001c 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -152,6 +152,14 @@ jobs:
             os: ubuntu-20.04
             optional_feature: uses_wchar=1
             optional_macros: inline=0
+          - feature: wxwidgets
+            CC: gcc-10
+            CXX: g++-10
+            PackageDeps: g++-10 libwxgtk3.0-gtk3-0v5 libwxgtk3.0-gtk3-dev
+            platform_file: include $(ACE_ROOT)/include/makeinclude/platform_linux.GNU
+            os: ubuntu-20.04
+            optional_feature: wxWindows=1
+            optional_macros: wxWindows=1
           - feature: CodeQL
             CC: gcc-10
             CXX: g++-10
diff --git a/TAO/utils/wxNamingViewer/wxAddNameServerDlg.cpp b/TAO/utils/wxNamingViewer/wxAddNameServerDlg.cpp
index 6b58dff752039..da0a19de9093a 100644
--- a/TAO/utils/wxNamingViewer/wxAddNameServerDlg.cpp
+++ b/TAO/utils/wxNamingViewer/wxAddNameServerDlg.cpp
@@ -98,7 +98,13 @@ WxAddNameServerDlg::WxAddNameServerDlg( wxWindow* parent)
       "Add Name Server",
       wxDefaultPosition,
       wxSize(186,69),
-      wxRAISED_BORDER | wxCAPTION | wxTHICK_FRAME | wxSYSTEM_MENU,
+      wxRAISED_BORDER | wxCAPTION |
+#if wxABI_VERSION < 20800
+      wxTHICK_FRAME   |
+#else
+      wxRESIZE_BORDER |
+#endif
+      wxSYSTEM_MENU,
       "addNameServer")
 #endif  // defined(wxUSE_RESOURCES) && (wxUSE_RESOURCES == 1)
   , ior("")
diff --git a/TAO/utils/wxNamingViewer/wxBindDialog.cpp b/TAO/utils/wxNamingViewer/wxBindDialog.cpp
index 6baafd53a19c8..f572405d6180b 100644
--- a/TAO/utils/wxNamingViewer/wxBindDialog.cpp
+++ b/TAO/utils/wxNamingViewer/wxBindDialog.cpp
@@ -82,7 +82,13 @@ WxBindDialog::WxBindDialog(
       "Bind Object/Context",
       wxDefaultPosition,
       wxSize( 300, 75),
-      wxRAISED_BORDER | wxCAPTION | wxTHICK_FRAME | wxSYSTEM_MENU,
+      wxRAISED_BORDER | wxCAPTION |
+#if wxABI_VERSION < 20800
+      wxTHICK_FRAME |
+#else
+      wxRESIZE_BORDER |
+#endif
+      wxSYSTEM_MENU,
       "bindObject")
 #endif  // defined(wxUSE_RESOURCES) && (wxUSE_RESOURCES == 1)
   , ior()
diff --git a/TAO/utils/wxNamingViewer/wxBindNewContext.cpp b/TAO/utils/wxNamingViewer/wxBindNewContext.cpp
index 3bbe855380e41..815468801e764 100644
--- a/TAO/utils/wxNamingViewer/wxBindNewContext.cpp
+++ b/TAO/utils/wxNamingViewer/wxBindNewContext.cpp
@@ -95,7 +95,13 @@ WxBindNewContext::WxBindNewContext( wxWindow* parent)
        "Bind New Context",
        wxDefaultPosition,
        wxSize( 300, 75),
-       wxRAISED_BORDER | wxCAPTION | wxTHICK_FRAME | wxSYSTEM_MENU,
+       wxRAISED_BORDER | wxCAPTION |
+#if wxABI_VERSION < 20800
+       wxTHICK_FRAME |
+#else
+       wxRESIZE_BORDER |
+#endif
+       wxSYSTEM_MENU,
        "bindNewContext")
 #endif  // defined(wxUSE_RESOURCES) && (wxUSE_RESOURCES == 1)
  {
diff --git a/TAO/utils/wxNamingViewer/wxNamingTree.cpp b/TAO/utils/wxNamingViewer/wxNamingTree.cpp
index 4037b8a84fa91..236baba14a066 100644
--- a/TAO/utils/wxNamingViewer/wxNamingTree.cpp
+++ b/TAO/utils/wxNamingViewer/wxNamingTree.cpp
@@ -90,7 +90,7 @@ void WxNamingTree::clearChildren()
 
 void WxNamingTree::clearChildren( wxTreeItemId& item)
 {
-  long cookie;
+  wxTreeItemIdValue cookie;
   wxTreeItemId child = GetFirstChild( item, cookie);
   while( child) {
     clearChildren( child);
@@ -311,7 +311,7 @@ void WxNamingTree::onContextPopupDestroy( wxCommandEvent&)
     return;
   }
   wxTreeItemId item = GetSelection();
-  wxTreeItemId parentItem = GetParent( item);
+  wxTreeItemId parentItem = GetItemParent( item);
   if (parentItem == 0) {
     return;
   }
@@ -350,7 +350,7 @@ void WxNamingTree::onContextPopupUnbind( wxCommandEvent&)
     return;
   }
   wxTreeItemId item = GetSelection();
-  wxTreeItemId parentItem = GetParent( item);
+  wxTreeItemId parentItem = GetItemParent( item);
   if (parentItem == 0) {
     return;
   }
@@ -404,7 +404,7 @@ void WxNamingTree::onObjectPopupUnbind( wxCommandEvent& )
   wxTreeItemId item = GetSelection();
 
   // Make sure we don't unbind "Root"
-  wxTreeItemId parentItem = GetParent( item);
+  wxTreeItemId parentItem = GetItemParent( item);
   if (parentItem == 0) {
     return;
   }
diff --git a/TAO/utils/wxNamingViewer/wxNamingViewer.cpp b/TAO/utils/wxNamingViewer/wxNamingViewer.cpp
index c53dc78a6716b..107a11c74b9d1 100644
--- a/TAO/utils/wxNamingViewer/wxNamingViewer.cpp
+++ b/TAO/utils/wxNamingViewer/wxNamingViewer.cpp
@@ -5,7 +5,6 @@
 // @author:  Charlie Frasch (cfrasch@atdesk.com)
 #include "ace/Init_ACE.h"
 #include "pch.h"
-#include "wx/resource.h"
 #include "wxNamingViewerFrame.h"
 #include "wxNamingViewer.wxr"
 
diff --git a/TAO/utils/wxNamingViewer/wxNamingViewer.wxr b/TAO/utils/wxNamingViewer/wxNamingViewer.wxr
index 48a9e15cc2d4b..c95f15ff33bbe 100644
--- a/TAO/utils/wxNamingViewer/wxNamingViewer.wxr
+++ b/TAO/utils/wxNamingViewer/wxNamingViewer.wxr
@@ -1,5 +1,5 @@
-static char *bindObject = "dialog(name = 'bindObject',\
-  style = 'wxRAISED_BORDER | wxCAPTION | wxTHICK_FRAME | wxSYSTEM_MENU',\
+static const char *bindObject = "dialog(name = 'bindObject',\
+  style = 'wxRAISED_BORDER | wxCAPTION | wxRESIZE_BORDER | wxSYSTEM_MENU',\
   title = 'Bind Object/Context',\
   id = 133,\
   x = -1, y = -1, width = 274, height = 66,\
@@ -26,8 +26,8 @@ static char *bindObject = "dialog(name = 'bindObject',\
   control = [1018, wxButton, 'View IOR', '0', 'viewIORButton', 222, 26, 50, 12, '',\
       [8, 'wxSWISS', 'wxNORMAL', 'wxNORMAL', 0, 'MS Sans Serif']]).";
 
-static char *addNameServer = "dialog(name = 'addNameServer',\
-  style = 'wxRAISED_BORDER | wxCAPTION | wxTHICK_FRAME | wxSYSTEM_MENU',\
+static const char *addNameServer = "dialog(name = 'addNameServer',\
+  style = 'wxRAISED_BORDER | wxCAPTION | wxRESIZE_BORDER | wxSYSTEM_MENU',\
   title = 'Add Name Server',\
   id = 136,\
   x = -1, y = -1, width = 186, height = 69,\
@@ -48,8 +48,8 @@ static char *addNameServer = "dialog(name = 'addNameServer',\
   control = [5105, wxStaticText, 'IOR:', '0', 'statictext7', 7, 30, 24, 6, '',\
       [8, 'wxSWISS', 'wxNORMAL', 'wxNORMAL', 0, 'MS Sans Serif']]).";
 
-static char *bindNewContext = "dialog(name = 'bindNewContext',\
-  style = 'wxRAISED_BORDER | wxCAPTION | wxTHICK_FRAME | wxSYSTEM_MENU',\
+static const char *bindNewContext = "dialog(name = 'bindNewContext',\
+  style = 'wxRAISED_BORDER | wxCAPTION | wxRESIZE_BORDER | wxSYSTEM_MENU',\
   title = 'Bind New Context',\
   id = 134,\
   x = -1, y = -1, width = 154, height = 76,\
@@ -70,8 +70,8 @@ static char *bindNewContext = "dialog(name = 'bindNewContext',\
   control = [5105, wxStaticText, 'Kind:', '0', 'statictext7', 7, 34, 15, 6, '',\
       [8, 'wxSWISS', 'wxNORMAL', 'wxNORMAL', 0, 'MS Sans Serif']]).";
 
-static char *viewIOR = "dialog(name = 'viewIOR',\
-  style = 'wxRAISED_BORDER | wxCAPTION | wxTHICK_FRAME | wxSYSTEM_MENU',\
+static const char *viewIOR = "dialog(name = 'viewIOR',\
+  style = 'wxRAISED_BORDER | wxCAPTION | wxRESIZE_BORDER | wxSYSTEM_MENU',\
   title = 'View IOR',\
   id = 102,\
   x = -1, y = -1, width = 394, height = 127,\
@@ -92,8 +92,8 @@ static char *viewIOR = "dialog(name = 'viewIOR',\
   control = [1007, wxTextCtrl, '', 'wxTE_READONLY', 'typeIDText', 57, 27, 274, 12, '',\
       [8, 'wxSWISS', 'wxNORMAL', 'wxNORMAL', 0, 'MS Sans Serif']]).";
 
-static char *selectNS = "dialog(name = 'selectNS',\
-  style = 'wxRAISED_BORDER | wxCAPTION | wxTHICK_FRAME | wxSYSTEM_MENU',\
+static const char *selectNS = "dialog(name = 'selectNS',\
+  style = 'wxRAISED_BORDER | wxCAPTION | wxRESIZE_BORDER | wxSYSTEM_MENU',\
   title = 'Select Naming Service',\
   id = 135,\
   x = -1, y = -1, width = 181, height = 94,\
diff --git a/TAO/utils/wxNamingViewer/wxSelectNSDialog.cpp b/TAO/utils/wxNamingViewer/wxSelectNSDialog.cpp
index ca363fcfd1ce9..03a13e1220c9b 100644
--- a/TAO/utils/wxNamingViewer/wxSelectNSDialog.cpp
+++ b/TAO/utils/wxNamingViewer/wxSelectNSDialog.cpp
@@ -93,7 +93,13 @@ WxSelectNSDialog::WxSelectNSDialog( wxWindow* parent)
       "Select Naming Service",
       wxDefaultPosition,
       wxSize(181,94),
-      wxRAISED_BORDER | wxCAPTION | wxTHICK_FRAME | wxSYSTEM_MENU,
+      wxRAISED_BORDER | wxCAPTION |
+#if wxABI_VERSION < 20800
+      wxTHICK_FRAME |
+#else
+      wxRESIZE_BORDER |
+#endif
+      wxSYSTEM_MENU,
       "selectNS")
 #endif  // defined(wxUSE_RESOURCES) && (wxUSE_RESOURCES == 1)
   , config( 0)
@@ -137,7 +143,11 @@ WxSelectNSDialog::WxSelectNSDialog( wxWindow* parent)
 
 WxSelectNSDialog::~WxSelectNSDialog()
 {
+#if 0
   int count = servers->Number();
+#else
+  int count = servers->GetCount();
+#endif
   for (int i = 0; i < count; i++) {
     delete static_cast<wxString*>( servers->GetClientData( i));
   }
@@ -152,10 +162,10 @@ void WxSelectNSDialog::onAdd( wxCommandEvent& WXUNUSED(event))
         dialog->getServerName(),
         new wxString( dialog->getIor()));
     ACE_Configuration_Section_Key section = config->root_section();
-    ACE_TString value = dialog->getIor().c_str();
+    ACE_TString value = dialog->getIor().c_str().AsChar();
     config->set_string_value(
         section,
-        dialog->getServerName().c_str(),
+        dialog->getServerName().c_str().AsChar(),
         value);
   }
 }
@@ -180,7 +190,7 @@ void WxSelectNSDialog::onInitDialog( wxInitDialogEvent& event)
 }
 
 
-void WxSelectNSDialog::onLeftDClick( wxMouseEvent& event)
+void WxSelectNSDialog::onLeftDClick( wxCommandEvent& event)
 {
   ACE_UNUSED_ARG( event);
 
diff --git a/TAO/utils/wxNamingViewer/wxSelectNSDialog.h b/TAO/utils/wxNamingViewer/wxSelectNSDialog.h
index 8052483bc7376..2a3d2b123803c 100644
--- a/TAO/utils/wxNamingViewer/wxSelectNSDialog.h
+++ b/TAO/utils/wxNamingViewer/wxSelectNSDialog.h
@@ -19,7 +19,7 @@ class WxSelectNSDialog : public
   void onInitDialog( wxInitDialogEvent& event);
   void onOK( wxCommandEvent& event);
   void onRemove( wxCommandEvent& event);
-  void onLeftDClick( wxMouseEvent& event);
+  void onLeftDClick( wxCommandEvent& event);
 
   class ACE_Configuration* config;
 
diff --git a/TAO/utils/wxNamingViewer/wxViewIORDialog.cpp b/TAO/utils/wxNamingViewer/wxViewIORDialog.cpp
index f6ea0460cf57d..209a57eb1f919 100644
--- a/TAO/utils/wxNamingViewer/wxViewIORDialog.cpp
+++ b/TAO/utils/wxNamingViewer/wxViewIORDialog.cpp
@@ -134,7 +134,13 @@ WxViewIORDialog::WxViewIORDialog(
       "View IOR",
       wxDefaultPosition,
       wxSize(394,127),
-      wxRAISED_BORDER | wxCAPTION | wxTHICK_FRAME | wxSYSTEM_MENU,
+      wxRAISED_BORDER | wxCAPTION |
+#if wxABI_VERSION < 20800
+      wxTHICK_FRAME |
+#else
+      wxRESIZE_BORDER |
+#endif
+      wxSYSTEM_MENU,
       "viewIOR")
 #endif  // defined(wxUSE_RESOURCES) && (wxUSE_RESOURCES == 1)
   , orb( orb)
@@ -208,15 +214,24 @@ void WxViewIORDialog::decodeIOR()
     } catch (const CORBA::Exception& ex) {
       wxMessageBox( ex._info().c_str(), "CORBA::Exception");
     }
-
   }
   profiles->Expand( rootItem);
 }
 
 
-void WxViewIORDialog::OnApply( wxCommandEvent& event)
+#if defined(ANCIENT_WX_WINDOWS)
+#define ONLY_ANCIENT_WX_USES(x) (x)
+#else
+#define ONLY_ANCIENT_WX_USES(x) WXUNUSED(x)
+#endif
+
+void WxViewIORDialog::OnApply( wxCommandEvent& ONLY_ANCIENT_WX_USES(event))
 {
+#if defined(ANCIENT_WX_WINDOWS)
   wxDialog::OnApply( event);
+#else
+  wxDialog::EndModal( wxID_APPLY);
+#endif
   try {
     object = orb->string_to_object( ior);
     decodeIOR();