Calculate the MD5 hash of a file.
|1||Filename||The full path of the file to hash|
|2||%var%||a user defined variable used to store the calculated hash.|
MD5 is a way to calculate a number known as a 'hash' or 'checksum' that is based on the content of a file.
It is most often used as a safety check to ensure that files are complete and unmodified when they are downloaded from a server.
This function will write the value of the MD5 result on %var%, you can compare against a security value written elsewhere to prove that your file is intact.