Retrieves a structural representation of the object's security descriptor. The method returns an integer value that can be ...

Retrieves a structural representation of the object's security descriptor.
The method returns an integer value that can be interpretted as follows: 
0 - Successful completion.
2 - The user does not have access to the requested information.
8 - Unknown failure.
9 - The user does not have adequate privileges.
21 - The specified parameter is invalid.
Other - For integer values other than those listed above, refer to Win32 error code documentation.