SS_EXT_T
This is an optional structure for a passing extended information to the functions.
typedef struct { unsigned long clientVersion; void *extParms; } SS_EXT_T;
This is an optional parameter that can be defined by the service and be used in the future to extend each API. The contents of the structure that extParms points to can change based on the version of the service. Caller can pass a NULL in place of this parameter.