*
* Registers a code function as being the default value. This function will get used by MSG_launch_application() when there is no registered function of the requested name in.
* \param code the function (must have the same prototype than the main function of any C program: int ..(int argc, char *argv[]))
*
* Registers a code function as being the default value. This function will get used by MSG_launch_application() when there is no registered function of the requested name in.
* \param code the function (must have the same prototype than the main function of any C program: int ..(int argc, char *argv[]))