isfd | isam file identifier |
data | pointer to data buffer to be loaded |
mode | search mode plus optional lock mode |
SUCCESS, or a negative value on error, in which case the error code is found in iserrno.
if successful isrecnum will be set to the current record number.
when isRead is called with ISLOCK, and the record requested is currently locked by another process, isRead will return ISFALSE with an iserrno value of ELOCKED but the requested record will still have been read into the data buffer.