+class WXDLLIMPEXP_FWD_CORE wxDataObject;
+class WXDLLIMPEXP_FWD_CORE wxWindow;
+
+// ----------------------------------------------------------------------------
+// macros
+// ----------------------------------------------------------------------------
+
+// this macro may be used instead for wxDropSource ctor arguments: it will use
+// the cursor 'name' from the resources under MSW, but will expand to
+// something else under GTK. If you don't use it, you will have to use #ifdef
+// in the application code.
+#define wxDROP_ICON(name) wxCursor(wxT(#name))