XPLMUnregisterDataAccessor

XPLMUnregisterDataAccessor

XPLM_API void       XPLMUnregisterDataAccessor(
                         XPLMDataRef          inDataRef);    

Use this routine to unregister any data accessors you may have registered. You unregister a data ref by the XPLMDataRef you get back from registration. Once you unregister a data ref, your function pointer will not be called anymore.