Hi,
I'm not sure what your trying to do but, having worked with hex numbers in the past, this might help. I'm guessing that from the hex string you supplied (00 4b 00 25 c9 00 00) that the file is 75 bytes in length with a starting point of 51493. 004b being the length and c925 being the starting point.
The formula to convert 8 bit (1 byte) to 16 bit numbers is ((byte1 * 256) + byte2).
Al.



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