switch(id)
{

case MUIV_Application_ReturnID_Quit:
running = FALSE;
break;

case CALCULATE:
{
float cell;
float value;
char value2[32];

get(fahrenText, MUIA_String_Contents, &contents);
value = atof (contents);
cell =(5.0/9.0) * (value - 32.0);

sprintf (value2, "%f", cell);

set(celciusText, MUIA_String_Contents, value2);

}
break;

}