Tt_status tttk_message_fail( Tt_message msg, Tt_status status, const char *status_string, int destroy );
The tttk_mesage_fail() function fails the message msg and then destroys it.
A program should abandon a message when it does not understand the message and wants to dispose of it.
A message whose state is TT_SENT can be failed. If the message is a handler-addressed message, or if it has a tt_message_status of TT_WRN_START_MESSAGE, it can be failed.
This function returns TT_DESKTOP_ENOTSUP.