Call this sub in the Load event and in both buttons. Change the names to whatever your controls are called.

Private Sub DisableButtons()

    If IsNull(StartTime) Then
        btnClockIn.Enabled = True
        btnClockOut.Enabled = False
    ElseIf IsNull(EndTime) Then
        btnClockIn.Enabled = False
        btnClockOut.Enabled = True
    Else
        btnClockOut.Enabled = False
        btnClockIn.Enabled = False
    End If
    
End Sub

Julian

On the Form's OnCurrent Event:

  'Start with both disabled
  Clock In button is Disabled
  Clock Out button is Disabled

  If [Time In] is empty Then
       Clock In Button is Enabled
  Else
       If [Time Out] is empty Then
            Clock Out Button is Enabled
       End If
  End If

On your Clock In Button On-Click Event:
  Set your time
  Clock In Button is Disabled
  Clock Out Button is Enabled

On your Clock Out Button On-Click Event:
  Set your time
  Clock Out Button is Disabled


This is the logic that seems correct to me.  Obviously you'll need to make this conform to the exact code.  I'm not sure if that's what you're asking as we don't have field names or design information.

Now you have to determine how to handle errors, like when an employee tells you they clicked the button, but didn't mean to.  Do you want the manager to have to fix it?  Do you want there to be a way for them to fix it?

Hope this helps,

-Raymond

Thanks guys. Just what I needed. Able to achieve the results I was looking for combining info from both.