@param LogEntryKey On entry, the key of the performance measurement log entry to retrieve.\r
0, then the first performance measurement log entry is retrieved.\r
On exit, the key of the next performance lof entry entry.\r
@param LogEntryKey On entry, the key of the performance measurement log entry to retrieve.\r
0, then the first performance measurement log entry is retrieved.\r
On exit, the key of the next performance lof entry entry.\r