WriteMessageProperties
Writes the properties in the map elements to an ESB message.
This function is used to write the properties from the map element values into an ESB message. This may be used only in the first child element under the WriteMessage function. Also, the element on which this function is specified must have a occurs maximum times of -1 and must inherit from /Builtin/Structures/Property.
This function can only be used in the IO/Database tab.