AutoOffset - property of the PmBuffer object
The internal automated positioning in the data block works automatically (but can also be set in the script).
Property access for read and write
After each successfull read/write operation of a value in the data block, this property is automatically set to the end (behind) yhe read/written value (to the beginning of next read/written value). This can be used for continuous value reading/writing or for detecting the number of read/written bytes by the difference of the value of this property before the operation and after the operation.
The read/write position is available in the form of the nOffset
parameter in each method working with the item or a portion of the data block, where the -4 value
means that the value of this internal positioning AutoOffset