Determines if the license is valid.
PRL_RESULT PrlLic_IsValid( PRL_HANDLE hLicense, PRL_BOOL_PTR pbValue );
PrlApiDisp.h
PRL_RESULT. Possible values:
PRL_ERR_INVALID_ARG - invalid handle or null pointer was passed.
PRL_ERR_NO_DATA - the specified license object does not contain license data.
PRL_ERR_SUCCESS - function completed successfully.