|nOffset||[optional] (Long) Specifies the position of read value in the data block.
The read value must be inside the data block. The item is read either whole or not read at all.
>= 0 - Index (in bytes, zero-based index) in data block.
-4 - The internal automatic position is used (see the AutoOffset property). It points behind the last read or written value and increases continually.
If the items are read/written one by one then it is not necessary to define the position, but it is better to use this automated positioning.
|nSize||[optional] (Long) The size of read data block.
The -1 value (default) means that the data block is read from the defined starting position to the end.
var oBuf = Pm.CreatePmBuffer();
var s1 = "40302010605070";
var oBuf2 = oBuf.GetBuffer(5, -1);
var val = oBuf2.GetHexaString(-4); //val = 5070