+//-----------------------------------------------------------------------------
+// key event conversion routines
+//-----------------------------------------------------------------------------
+
+static long map_to_unmodified_wx_keysym( KeySym keysym )
+{
+    guint key_code = 0;
+
+    switch (keysym)
+    {
+        case GDK_Shift_L:
+        case GDK_Shift_R:       key_code = WXK_SHIFT;       break;
+        case GDK_Control_L:
+        case GDK_Control_R:     key_code = WXK_CONTROL;     break;
+        case GDK_Menu:          key_code = WXK_MENU;        break;
+        case GDK_Help:          key_code = WXK_HELP;        break;
+        case GDK_BackSpace:     key_code = WXK_BACK;        break;
+        case GDK_ISO_Left_Tab:
+        case GDK_Tab:           key_code = WXK_TAB;         break;
+        case GDK_Linefeed:      key_code = WXK_RETURN;      break;
+        case GDK_Clear:         key_code = WXK_CLEAR;       break;
+        case GDK_Return:        key_code = WXK_RETURN;      break;
+        case GDK_Pause:         key_code = WXK_PAUSE;       break;
+        case GDK_Scroll_Lock:   key_code = WXK_SCROLL;      break;
+        case GDK_Escape:        key_code = WXK_ESCAPE;      break;
+        case GDK_Delete:        key_code = WXK_DELETE;      break;
+        case GDK_Home:          key_code = WXK_HOME;        break;
+        case GDK_Left:          key_code = WXK_LEFT;        break;
+        case GDK_Up:            key_code = WXK_UP;          break;
+        case GDK_Right:         key_code = WXK_RIGHT;       break;
+        case GDK_Down:          key_code = WXK_DOWN;        break;
+        case GDK_Prior:         key_code = WXK_PRIOR;       break;
+//      case GDK_Page_Up:       key_code = WXK_PAGEUP;      break;
+        case GDK_Next:          key_code = WXK_NEXT;        break;
+//      case GDK_Page_Down:     key_code = WXK_PAGEDOWN;    break;
+        case GDK_End:           key_code = WXK_END;         break;
+        case GDK_Begin:         key_code = WXK_HOME;        break;
+        case GDK_Select:        key_code = WXK_SELECT;      break;
+        case GDK_Print:         key_code = WXK_PRINT;       break;
+        case GDK_Execute:       key_code = WXK_EXECUTE;     break;
+        case GDK_Insert:        key_code = WXK_INSERT;      break;
+        case GDK_Num_Lock:      key_code = WXK_NUMLOCK;     break;
+
+        case GDK_KP_0:         key_code = WXK_NUMPAD0;      break;
+        case GDK_KP_1:         key_code = WXK_NUMPAD1;      break;
+        case GDK_KP_2:         key_code = WXK_NUMPAD2;      break;
+        case GDK_KP_3:         key_code = WXK_NUMPAD3;      break;
+        case GDK_KP_4:         key_code = WXK_NUMPAD4;      break;
+        case GDK_KP_5:         key_code = WXK_NUMPAD5;      break;
+        case GDK_KP_6:         key_code = WXK_NUMPAD6;      break;
+        case GDK_KP_7:         key_code = WXK_NUMPAD7;      break;
+        case GDK_KP_8:         key_code = WXK_NUMPAD8;      break;
+        case GDK_KP_9:         key_code = WXK_NUMPAD9;      break;
+        case GDK_KP_Space:     key_code = WXK_NUMPAD_SPACE; break;
+        case GDK_KP_Tab:       key_code = WXK_NUMPAD_TAB;   break;
+        case GDK_KP_Enter:     key_code = WXK_NUMPAD_ENTER; break;
+        case GDK_KP_F1:        key_code = WXK_NUMPAD_F1;    break;
+        case GDK_KP_F2:        key_code = WXK_NUMPAD_F2;    break;
+        case GDK_KP_F3:        key_code = WXK_NUMPAD_F3;    break;
+        case GDK_KP_F4:        key_code = WXK_NUMPAD_F4;    break;
+        case GDK_KP_Home:      key_code = WXK_NUMPAD_HOME;  break;
+        case GDK_KP_Left:      key_code = WXK_NUMPAD_LEFT;  break;
+        case GDK_KP_Up:        key_code = WXK_NUMPAD_UP;    break;
+        case GDK_KP_Right:     key_code = WXK_NUMPAD_RIGHT; break;
+        case GDK_KP_Down:      key_code = WXK_NUMPAD_DOWN;  break;
+        case GDK_KP_Prior:     key_code = WXK_NUMPAD_PRIOR; break;
+//      case GDK_KP_Page_Up:   key_code = WXK_NUMPAD_PAGEUP;   break;
+        case GDK_KP_Next:      key_code = WXK_NUMPAD_PRIOR; break;
+//      case GDK_KP_Page_Down: key_code = WXK_NUMPAD_PAGEDOWN; break;
+        case GDK_KP_End:       key_code = WXK_NUMPAD_END;   break;
+        case GDK_KP_Begin:     key_code = WXK_NUMPAD_BEGIN; break;
+        case GDK_KP_Insert:    key_code = WXK_NUMPAD_INSERT; break;
+        case GDK_KP_Delete:    key_code = WXK_NUMPAD_DELETE; break;
+        case GDK_KP_Equal:     key_code = WXK_NUMPAD_EQUAL;  break;
+        case GDK_KP_Multiply:  key_code = WXK_NUMPAD_MULTIPLY; break;
+        case GDK_KP_Add:       key_code = WXK_NUMPAD_ADD;    break;
+        case GDK_KP_Separator: key_code = WXK_NUMPAD_SEPARATOR; break;
+        case GDK_KP_Subtract:  key_code = WXK_NUMPAD_SUBTRACT;  break;
+        case GDK_KP_Decimal:   key_code = WXK_NUMPAD_DECIMAL;   break;
+        case GDK_KP_Divide:    key_code = WXK_NUMPAD_DIVIDE;    break;
+    
+        case GDK_F1:            key_code = WXK_F1;          break;
+        case GDK_F2:            key_code = WXK_F2;          break;
+        case GDK_F3:            key_code = WXK_F3;          break;
+        case GDK_F4:            key_code = WXK_F4;          break;
+        case GDK_F5:            key_code = WXK_F5;          break;
+        case GDK_F6:            key_code = WXK_F6;          break;
+        case GDK_F7:            key_code = WXK_F7;          break;
+        case GDK_F8:            key_code = WXK_F8;          break;
+        case GDK_F9:            key_code = WXK_F9;          break;
+        case GDK_F10:           key_code = WXK_F10;         break;
+        case GDK_F11:           key_code = WXK_F11;         break;
+        case GDK_F12:           key_code = WXK_F12;         break;
+        default:
+        {
+            if (keysym <= 0xFF)
+            {
+                guint upper = gdk_keyval_to_upper( keysym );
+                keysym = (upper != 0 ? upper : keysym ); /* to be MSW compatible */
+                key_code = keysym;
+            }
+        }
+    }
+
+    return (key_code);
+}
+
+static long map_to_wx_keysym( KeySym keysym )
+{
+    guint key_code = 0;
+
+    switch (keysym)
+    {
+        case GDK_Shift_L:
+        case GDK_Shift_R:       key_code = WXK_SHIFT;       break;
+        case GDK_Control_L:
+        case GDK_Control_R:     key_code = WXK_CONTROL;     break;
+        case GDK_Menu:          key_code = WXK_MENU;        break;
+        case GDK_Help:          key_code = WXK_HELP;        break;
+        case GDK_BackSpace:     key_code = WXK_BACK;        break;
+        case GDK_ISO_Left_Tab:
+        case GDK_Tab:           key_code = WXK_TAB;         break;
+        case GDK_Linefeed:      key_code = WXK_RETURN;      break;
+        case GDK_Clear:         key_code = WXK_CLEAR;       break;
+        case GDK_Return:        key_code = WXK_RETURN;      break;
+        case GDK_Pause:         key_code = WXK_PAUSE;       break;
+        case GDK_Scroll_Lock:   key_code = WXK_SCROLL;      break;
+        case GDK_Escape:        key_code = WXK_ESCAPE;      break;
+        case GDK_Delete:        key_code = WXK_DELETE;      break;
+        case GDK_Home:          key_code = WXK_HOME;        break;
+        case GDK_Left:          key_code = WXK_LEFT;        break;
+        case GDK_Up:            key_code = WXK_UP;          break;
+        case GDK_Right:         key_code = WXK_RIGHT;       break;
+        case GDK_Down:          key_code = WXK_DOWN;        break;
+        case GDK_Prior:         key_code = WXK_PRIOR;       break;
+//      case GDK_Page_Up:       key_code = WXK_PAGEUP;      break;
+        case GDK_Next:          key_code = WXK_NEXT;        break;
+//      case GDK_Page_Down:     key_code = WXK_PAGEDOWN;    break;
+        case GDK_End:           key_code = WXK_END;         break;
+        case GDK_Begin:         key_code = WXK_HOME;        break;
+        case GDK_Select:        key_code = WXK_SELECT;      break;
+        case GDK_Print:         key_code = WXK_PRINT;       break;
+        case GDK_Execute:       key_code = WXK_EXECUTE;     break;
+        case GDK_Insert:        key_code = WXK_INSERT;      break;
+        case GDK_Num_Lock:      key_code = WXK_NUMLOCK;     break;
+
+        case GDK_KP_0:         key_code = '0';      break;
+        case GDK_KP_1:         key_code = '1';      break;
+        case GDK_KP_2:         key_code = '2';      break;
+        case GDK_KP_3:         key_code = '3';      break;
+        case GDK_KP_4:         key_code = '4';      break;
+        case GDK_KP_5:         key_code = '5';      break;
+        case GDK_KP_6:         key_code = '6';      break;
+        case GDK_KP_7:         key_code = '7';      break;
+        case GDK_KP_8:         key_code = '8';      break;
+        case GDK_KP_9:         key_code = '9';      break;
+        case GDK_KP_Space:     key_code = ' ';      break;
+        case GDK_KP_Tab:       key_code = WXK_TAB;    break;        /* or '\t' ??? */
+        case GDK_KP_Enter:     key_code = WXK_RETURN; break;        /* or '\r' ??? */
+        case GDK_KP_F1:        key_code = WXK_NUMPAD_F1;    break;
+        case GDK_KP_F2:        key_code = WXK_NUMPAD_F2;    break;
+        case GDK_KP_F3:        key_code = WXK_NUMPAD_F3;    break;
+        case GDK_KP_F4:        key_code = WXK_NUMPAD_F4;    break;
+        case GDK_KP_Home:      key_code = WXK_HOME;  break;
+        case GDK_KP_Left:      key_code = WXK_LEFT;  break;
+        case GDK_KP_Up:        key_code = WXK_UP;    break;
+        case GDK_KP_Right:     key_code = WXK_RIGHT; break;
+        case GDK_KP_Down:      key_code = WXK_DOWN;  break;
+        case GDK_KP_Prior:     key_code = WXK_PRIOR; break;
+//      case GDK_KP_Page_Up:   key_code = WXK_PAGEUP; break;
+        case GDK_KP_Next:      key_code = WXK_PRIOR;  break;
+//      case GDK_KP_Page_Down: key_code = WXK_PAGEDOWN; break;
+        case GDK_KP_End:       key_code = WXK_END;    break;
+        case GDK_KP_Begin:     key_code = WXK_HOME;   break;
+        case GDK_KP_Insert:    key_code = WXK_INSERT; break;
+        case GDK_KP_Delete:    key_code = WXK_DELETE; break;
+        case GDK_KP_Equal:     key_code = '=';   break;
+        case GDK_KP_Multiply:  key_code = '*';   break;
+        case GDK_KP_Add:       key_code = '+';   break;
+        case GDK_KP_Separator: key_code = ',';   break;
+        case GDK_KP_Subtract:  key_code = '-';   break;
+        case GDK_KP_Decimal:   key_code = '.';   break;
+        case GDK_KP_Divide:    key_code = '/';   break;
+    
+        case GDK_F1:            key_code = WXK_F1;          break;
+        case GDK_F2:            key_code = WXK_F2;          break;
+        case GDK_F3:            key_code = WXK_F3;          break;
+        case GDK_F4:            key_code = WXK_F4;          break;
+        case GDK_F5:            key_code = WXK_F5;          break;
+        case GDK_F6:            key_code = WXK_F6;          break;
+        case GDK_F7:            key_code = WXK_F7;          break;
+        case GDK_F8:            key_code = WXK_F8;          break;
+        case GDK_F9:            key_code = WXK_F9;          break;
+        case GDK_F10:           key_code = WXK_F10;         break;
+        case GDK_F11:           key_code = WXK_F11;         break;
+        case GDK_F12:           key_code = WXK_F12;         break;
+        default:
+        {
+            if (keysym <= 0xFF)
+            {
+                key_code = keysym;
+            }
+        }
+    }
+
+    return (key_code);
+}
+
+static long get_unmodified_wx_keysym( GdkEventKey *event )
+{
+    KeyCode keycode = XKeysymToKeycode( GDK_DISPLAY(), event->keyval );
+    KeySym keysym = XKeycodeToKeysym( GDK_DISPLAY(), keycode, 0 );
+
+    return (map_to_unmodified_wx_keysym( keysym ));
+}
+