Create function (2)

• The function must extract information from the parent

  struct ComponentData *wdata =
        (struct ComponentData *) 
        unhand(parent)->pData;
  

• wdata->widget contains the parent widget
• it must build a data structure for the new object

  struct ComponentData *cdata = 
        (struct ComponentData *) 
        sysMalloc(sizeof(struct 
                      ComponentData));
  SET_PDATA(this, cdata)