So you are parsing a line of fixed width fields... Read the line in, take the first nine chars and store in H100, take the next 12 chars and store in FileName, continue until you have consumed all chars.
Then, use the variables that you have stored the data in for whatever tasks you need them for.
MSDN - How to read from a text file [
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Other functions that will help you: left, right, mid, instr