PRIVATE timeSum timeSum= CTOT(thisform.text1.value)-CTOT('0:') timeSum=m.timeSum-( CTOT(thisform.text2.value)-CTOT('0:')) thisform.text3.value= STUFF(TTOC(CTOT('0:')+m.timeSum,2),1,2,; STR(INT(VAL(TTOC(CTOT('0:')+m.timeSum,2)))+24*INT(m.timeSum/86400)))thanks.