註冊custom message

 const struct KzuMessageType* MESSAGE_TEXTUREFONT_CHANGRD;
 {
  struct KzcMemoryManager* memoryManager = kzcMemoryGetManager(factory);
  struct KzuMessageType* messageType;
                
  //Message.Custom.FontChange 對應Editor裡的Custom Message Name
  result = kzuMessageRegistryAddMessageType(memoryManager, "Message.Custom.FontChange", KZU_MESSAGE_ROUTING_TUNNELLING_BUBBLING,        &messageType);
  kzsErrorForward(result);

  MESSAGE_TEXTUREFONT_CHANGRD = messageType;
 }