The preamble to set.
Value that represents the length of the preamble, in bytes. The maximum length is 128 bytes.
The standard length of the Preamble is 128 bytes. If the value specified by length is > 128 bytes, then the Preamble will be set with the first 128 bytes of preamble. If length is < or equal 128 bytes, then the Preamble will be set with the entire contents of preamble.
To retrieve the contents of the Preamble, call the GetPreamble method.
For an example, refer to SetIntValue.