diff --git a/interface/wx/propgrid/propgriddefs.h b/interface/wx/propgrid/propgriddefs.h
new file mode 100644
index 0000000000..084118b9ba
--- /dev/null
+++ b/interface/wx/propgrid/propgriddefs.h
@@ -0,0 +1,158 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        propgriddefs.h
+// Purpose:     various constants, etc. used in documented propgrid API
+// Author:      wxWidgets team
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+
+// -----------------------------------------------------------------------
+
+/** @section propgrid_misc wxPropertyGrid Miscellanous
+
+    This section describes some miscellanous values, types and macros.
+    @{
+*/
+
+// Used to tell wxPGProperty to use label as name as well
+#define wxPG_LABEL              (*wxPGProperty::sm_wxPG_LABEL)
+
+// This is the value placed in wxPGProperty::sm_wxPG_LABEL
+#define wxPG_LABEL_STRING       wxS("@!")
+#define wxPG_NULL_BITMAP        wxNullBitmap
+#define wxPG_COLOUR_BLACK       (*wxBLACK)
+
+/** Convert Red, Green and Blue to a single 32-bit value.
+*/
+#define wxPG_COLOUR(R,G,B) ((wxUint32)(R+(G<<8)+(B<<16)))
+
+
+/** If property is supposed to have custom-painted image, then returning
+    this in OnMeasureImage() will usually be enough.
+*/
+#define wxPG_DEFAULT_IMAGE_SIZE             wxSize(-1, -1)
+
+
+/** This callback function is used for sorting properties.
+
+    Call wxPropertyGrid::SetSortFunction() to set it.
+
+    Sort function should return a value greater than 0 if position of p1 is
+    after p2. So, for instance, when comparing property names, you can use
+    following implementation:
+
+        @code
+            int MyPropertySortFunction(wxPropertyGrid* propGrid,
+                                       wxPGProperty* p1,
+                                       wxPGProperty* p2)
+            {
+                return p1->GetBaseName().compare( p2->GetBaseName() );
+            }
+        @endcode
+*/
+typedef int (*wxPGSortCallback)(wxPropertyGrid* propGrid,
+                                wxPGProperty* p1,
+                                wxPGProperty* p2);
+
+
+
+typedef wxString wxPGCachedString;
+
+/** @}
+*/
+
+// -----------------------------------------------------------------------
+
+// Used to indicate wxPGChoices::Add etc that the value is actually not given
+// by the caller.
+#define wxPG_INVALID_VALUE      INT_MAX
+
+// -----------------------------------------------------------------------
+
+enum wxPG_GETPROPERTYVALUES_FLAGS
+{
+
+/** Flags for wxPropertyGridInterface::GetPropertyValues */
+wxPG_KEEP_STRUCTURE               = 0x00000010,
+
+/** Flags for wxPropertyGrid::SetPropertyAttribute() etc */
+wxPG_RECURSE                      = 0x00000020,
+
+/** Include attributes for GetPropertyValues. */
+wxPG_INC_ATTRIBUTES               = 0x00000040,
+
+/** Used when first starting recursion. */
+wxPG_RECURSE_STARTS               = 0x00000080,
+
+/** Force value change. */
+wxPG_FORCE                        = 0x00000100,
+
+/** Only sort categories and their immediate children.
+    Sorting done by wxPG_AUTO_SORT option uses this.
+*/
+wxPG_SORT_TOP_LEVEL_ONLY          = 0x00000200
+
+};
+
+/** Flags for wxPropertyGrid::SetPropertyAttribute() etc */
+#define wxPG_DONT_RECURSE         0x00000000
+
+// -----------------------------------------------------------------------
+
+// Misc argument flags.
+enum wxPG_MISC_ARG_FLAGS
+{
+    // Get/Store full value instead of displayed value.
+    wxPG_FULL_VALUE                     = 0x00000001,
+
+    wxPG_REPORT_ERROR                   = 0x00000002,
+
+    wxPG_PROPERTY_SPECIFIC              = 0x00000004,
+
+    // Get/Store editable value instead of displayed one (should only be
+    // different in the case of common values)
+    wxPG_EDITABLE_VALUE                 = 0x00000008,
+
+    // Used when dealing with fragments of composite string value
+    wxPG_COMPOSITE_FRAGMENT             = 0x00000010,
+
+    // Means property for which final string value is for cannot really be
+    // edited.
+    wxPG_UNEDITABLE_COMPOSITE_FRAGMENT  = 0x00000020,
+
+    // ValueToString() called from GetValueAsString()
+    // (guarantees that input wxVariant value is current own value)
+    wxPG_VALUE_IS_CURRENT               = 0x00000040,
+
+    // Value is being set programmatically (ie. not by user)
+    wxPG_PROGRAMMATIC_VALUE             = 0x00000080
+};
+
+// -----------------------------------------------------------------------
+
+// wxPGProperty::SetValue() flags
+enum wxPG_SETVALUE_FLAGS
+{
+    wxPG_SETVAL_REFRESH_EDITOR      = 0x0001,
+    wxPG_SETVAL_AGGREGATED          = 0x0002,
+    wxPG_SETVAL_FROM_PARENT         = 0x0004,
+    wxPG_SETVAL_BY_USER             = 0x0008  // Set if value changed by user
+};
+
+// -----------------------------------------------------------------------
+
+//
+// Valid constants for wxPG_UINT_BASE attribute
+// (long because of wxVariant constructor)
+#define wxPG_BASE_OCT                       (long)8
+#define wxPG_BASE_DEC                       (long)10
+#define wxPG_BASE_HEX                       (long)16
+#define wxPG_BASE_HEXL                      (long)32
+
+//
+// Valid constants for wxPG_UINT_PREFIX attribute
+#define wxPG_PREFIX_NONE                    (long)0
+#define wxPG_PREFIX_0x                      (long)1
+#define wxPG_PREFIX_DOLLAR_SIGN             (long)2
+
+// -----------------------------------------------------------------------