+/**\r
+ Produces a RETURN_STATUS code with the highest bit clear. \r
+\r
+ @param StatusCode The status code value to convert into a warning code. \r
+ StatusCode must be in the range 0x00000000..0x7FFFFFFF.\r
+\r
+ @return The value specified by StatusCode with the highest bit clear.\r
+\r
+**/\r
+#define ENCODE_WARNING(StatusCode) (StatusCode)\r
+\r
+/**\r
+ Returns TRUE if a specified RETURN_STATUS code is an error code. \r
+\r
+ This function returns TRUE if StatusCode has the high bit set. Otherwise FALSE is returned. \r
+ \r
+ @param StatusCode The status code value to evaluate.\r
+\r
+ @retval TRUE The high bit of StatusCode is set.\r
+ @retval FALSE The high bit of StatusCode is clear.\r
+\r
+**/\r
+#define RETURN_ERROR(StatusCode) ((INTN) (StatusCode) < 0)\r
+\r
+///\r
+/// The operation completed successfully.\r
+///\r