I've had a shot at amending Chip Pearson's time entry routine for you

Private Sub Worksheet_Change(ByVal Target As Excel.Range)
Dim TimeStr As String
Dim fPM As Boolean
On Error GoTo EndMacro
If Application.Intersect(Target, Range("A1:A10")) Is Nothing Then
Exit Sub
End If
If Target.Cells.Count 1 Then
Exit Sub
End If
If Target.Value = "" Then
Exit Sub
End If

Application.EnableEvents = False
With Target
If UCase(Right(.Value, 2)) = "PM" Then
fPM = True
.Value = Left(.Value, Len(.Value) - 2)
ElseIf UCase(Right(.Value, 2)) = "AM" Then
.Value = Left(.Value, Len(.Value) - 2)
End If
If .HasFormula = False Then
Select Case Len(.Value)
Case 1 ' e.g., 1 = 00:01 AM
TimeStr = "00:0" & .Value
Case 2 ' e.g., 12 = 00:12 AM
TimeStr = "00:" & .Value
Case 3 ' e.g., 735 = 7:35 AM
TimeStr = Left(.Value, 1) & ":" & _
Right(.Value, 2)
Case 4 ' e.g., 1234 = 12:34
TimeStr = Left(.Value, 2) & ":" & _
Right(.Value, 2)
Case 5 ' e.g., 12345 = 1:23:45 NOT 12:03:45
TimeStr = Left(.Value, 1) & ":" & _
Mid(.Value, 2, 2) & ":" & Right(.Value, 2)
Case 6 ' e.g., 123456 = 12:34:56
TimeStr = Left(.Value, 2) & ":" & _
Mid(.Value, 3, 2) & ":" & Right(.Value, 2)
Case Else
Err.Raise 0
End Select
If fPM Then
TimeStr = Left(TimeStr, InStr(1, TimeStr, ":") - 1) + 12 & _
":" & Right(TimeStr, Len(TimeStr) - InStr(1, TimeStr, ":"))
End If
.Value = TimeValue(TimeStr)
End If
End With
Application.EnableEvents = True
Exit Sub
EndMacro:
MsgBox "You did not enter a valid time"
Application.EnableEvents = True
End Sub

'This is worksheet event code, which means that it needs to be
'placed in the appropriate worksheet code module, not a standard
'code module. To do this, right-click on the sheet tab, select
'the View Code option from the menu, and paste the code in.


--
HTH

Bob Phillips

(remove nothere from email address if mailing direct)

"Cyrus" wrote in message
...
I have a log sheet where a nurse will enter the time in and time out. I
have
a formula giving the total time in clinic. What is the best way to set
up
formatting for entry?

I don't want the nurse to be required to type a colon, but I do need her
to
do AM or PM.

My formula for figuring the time duration is:

=TEXT(IF(M2-L20,M2-L2,""),"h:mm")

Is this the best formula for ease of entry?

I would like her to type time in to be "130p" and time out "215p" and my
formula to display "00:45" I need am/pm so that it can figure time in
"1245a" and time out "115p"

I need help!!!

Cyrus