/** @ingroup group_funcmacro_file */
//@{
+/**
+ A special return value of many wxWidgets classes to indicate that
+ an invalid offset was given.
+*/
+const int wxInvalidOffset = -1;
+
/**
Under Unix this macro changes the current process umask to the given value,
unless it is equal to -1 in which case nothing is done, and restores it to