The ConvertStringSidToSid function converts a string-format SID into a valid, functional SID. You can use this function to retrieve a SID that the ConvertSidToStringSid function converted to string format.
8/27/2008 6:25:42 AM - -90.3.234.151
The ConvertSidToStringSid function converts a security identifier (SID) to a string format suitable for display, storage, or transmission.
5/23/2012 2:33:44 PM - -68.36.250.20
Frees the specified local memory object and invalidates its handle.