Extract helpstring from enum member

I have an enumeration defined in idl:

typedef enum
{
 [helpstring("My help string")]
 MyValue = 231,

} MyENUM;

The TypeLibarary is included in compiled dll as resource item. I can obtain it at runtime with LoadTypeLibEx function. Is it possible to obtain the value of the helpstring (to use for generating error message) from MyENUM for a particular member (MyValue) having an integer value 231?

Please mark replies as answers if they help