The compression format (if any) to use.
int SetCompressionFormat(int iCompressionFormat);
By default, outgoing data will not be compressed. Setting this property will instruct the class to compress the outgoing data using the indicated format.
Compression is highly recommended for large messages, as it will reduce network bandwidth and processing time required.
The compression algorithm used is Zlib, as required by RFC 3274 and defined in RFCs 1950 and 1951.