compress( dest:Byte Ptr,dest_len Var,source:Byte Ptr,source_len ) Compress a block of data at default compression level
compress2( dest:Byte Ptr,dest_len Var,source:Byte Ptr,source_len,level ) Compress a block of data at specified compression level
uncompress( dest:Byte Ptr,dest_len Var,source:Byte Ptr,source_len ) Uncompress a block of data