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TCrc32
Properties
About guess what :-)
Crc32FileName Name of the file from which to compute the Crc32 value.
Progress Percentage of data that is already processed.
ProgressStep Value from 0..100. A value of 11 generates an event when 11%, 22%, 33%, ... 99%, 100% of the data is processed. 0 disables this event and 100 only triggers the event when all the data is processed.
WindowOnError If set, the component will show a message to the user. You can disable this and inform (or not) the user the way you want.

Functions
CalcCrc32 Returns the Crc32 value of the file denoted in Crc32FileName.
CalcCrc32_hex Returns a string representing the hexadecimal Crc32 value of the file denoted in Crc32FileName.

Events
OnProgress After completion of ..% (see ProgressStep) this event will be triggered.