convert minutes to HH:MM

I am trying to gather the total elapsed time when a user travels.  My code SORT OF works, but instead of return HH:MM i am getting HH:MM:SS AM/PM.

pda, arrvtime, minutes, totalmin dimmed as intergers


Private Sub cmdCCT_Click()
' used to determine if traveler traveled on a non workday

    If frmWD.Value = 1 Then
        mydir = -480
    Else
        mydir = 0
    End If
   
pda = 180 ' 3 hours before departure on flight
arrvtime = txtATAROD.Value * 60 'determines time from airport to site
minutes = DateDiff("n", [txtTDOTDY], [txtTAOTDY]) 'time of flight departs - time flight arrives

totalmin = arrvtime + minutes + pda + mydir ' total elapsed time in minutes

totalCT = Format(totalmin \ 60, "0") & ":" & Format(totalmin Mod 60, "00")


txtCTHADOD.SetFocus
txtCTHADOD.Text = totalCT

End Sub

As an example flight departs 08:00
                           flight arrives  18:00
                             elapsed time 10 hours or 600 minutes(datediff function)
                           takes 90 minutes to arrive at job site
                           180(pda
so totalmin = 180(pda)+90(arrvtime)+minutes or totalmin = 870.

totalct dimmed as date (tried interger, long, double but kept getting type mismatch error)

when I use this:  totalCT = Format(totalmin \ 60, "0") & ":" & Format(totalmin Mod 60, "00")  the result is 2:30:00 pm  what I need is to show the total elapsed Hours and Minutes and not 2:30:00 pm.