property BlockLength : Word
The number of bytes currently being transferred per block.
For some protocols this value remains fixed (e.g., Xmodem always uses 128 byte blocks); for others it can vary during the transfer process (e.g., Zmodem can vary between 8192 bytes and 256 bytes depending on options and line conditions).
This property is most useful within an OnProtocolStatus event handler. See "Protocol status" in the printed documentation for more information.