Because I changed the function on ghe fly i missed something:

USE newdnc
thisform.text9.value  = time()&& i a ctivate it at the begining run
thisform.text13.value = time() && after seconds i activate it via command bottom1.
thisform.text14.value = thisform.TIM(thisform.text13.value, thisform.text9.value)
replace time1 with thisform.text9.value,;
        time2 with thisform.text13.value,;
        time3 with thisform.text14.value


***** Method TIM of the form
   LPARAMETERS nSecs, nSec2
   LOCAL c_hours, c_min, c_znak, nLocSec
   IF .NOT. TYPE("nSecs") $"CT" .OR.;
      .NOT. TYPE("nSec2") $"CT" .OR.;
      TYPE("nSecs") # TYPE("nSec2")
      RETURN ""
   ENDIF

   IF TYPE("nSecs") == "C" && Time string
      nLocSecs = VAL(LEFT(nSec2,2))*3600
      nLocSecs = nLocSecs + VAL(SUBSTR(nSec2,4,2))*60+ VAL(SUBSTR(nSec2,7,2))
      nLocSecs = nLocSecs - (VAL(LEFT(nSecs,2))*3600 ++ VAL(SUBSTR(nSecs,4,2))*60+ VAL(SUBSTR(nSecs,7,2)))
   ELSE
*** Suppose here You passed DateTime parameters
      nLocSecs = nSec2 - nSecs
   ENDIF

   c_znak  = IIF(nLocSecs < 0, "-","")
   nSecs   = ABS(nLocSecs)
   c_hours = INT(nSecs/3600)
   nSecs   = nSecs - (c_hours*3600)
   c_hours = IIF(c_hours<10,"0","")+ALLTRIM(STR(c_hours,15))
   c_min   = INT(nSecs/60)
   nSecs   = nSecs - (c_min*60)
   c_min   = IIF(c_min<10,"0","") + ALLTRIM(STR(c_min,15))
   nSecs   = IIF(nSecs<10,"0","") + ALLTRIM(STR(nSecs,10))

RETURN c_znak+c_hours+":"+c_min+":"+nSecs

Function TIME() returns string so if You have to save this TIME All fields must be Character type, this function also returns a string