// Create a message with the ID "my_message" LLMessageSystem message("my_message"); // Add a 32-bit unsigned integer with the value 42 message.addU32Fast("my_u32", 42);In this example, we create a new message using the LLMessageSystem constructor with the message ID "my_message". We then use the addU32Fast method to add a 32-bit unsigned integer with the value 42 and the tag "my_u32". This integer can now be sent as part of a message to other components of the virtual world. Package library: Second Life SDK.