Define A Time Range When Upper Limit is Midnight

[Ark68]

The code below is supposed to do something pretty simple. Take a time value (CDate(Me.tb_ps_sttime.Value))and see if it falls with a shift (defined by a start - ty9s -and end time - ty9e).

Private Sub cb_ps_crew_Change()

    Dim ty9s As Double
    Dim ty9e As Double

    If mbEvents Then Exit Sub
    mbEvents = True
    
    ty9s = WorksheetFunction.VLookup((Me.cb_ps_crew.Value & "1"), ws_staff.Range("I5:M38"), 4, False)
    ty9e = WorksheetFunction.VLookup((Me.cb_ps_crew.Value & "1"), ws_staff.Range("I5:M38"), 5, False)
    rn = ws_data.Range("A:A").Find(Me.tb_rid.Value).row
    
    If WorksheetFunction.VLookup((Me.cb_ps_crew.Value & "1"), ws_staff.Range("I5:M38"), 2, False) = "X" Then
        MsgBox "There is no staff scheduled on this crew." & Chr(13) & "Please select another crew, or adjust the staff schedule.", vbExclamation, "STAFF DEFICIENCY"
        Me.cb_ps_crew.Value = ws_data.Range("AU" & rn)
    ElseIf CDate(Me.tb_ps_sttime.Value) < ty9s Or CDate(Me.tb_ps_sttime.Value) > ty9e And Me.cb_ps_stq.Value <> "<" Then
        MsgBox "This crew is unavailable for this service at the time requested." & Chr(13) & "Please select another crew, adjust the staff schedule or change the service time.", vbExclamation, "STAFF DEFICIENCY"
        Me.cb_ps_crew.Value = ws_data.Range("AU" & rn)
    End If
    cb_ps_crew.BackColor = RGB(255, 255, 255)
    
    mbEvents = False

End Sub

The problem I am having is something like this.

CDate(Me.tb_ps_sttime.Value) = 9:00 PM
ty9s = 4:00 PM
ty9e = midnight (0:00 AM the next day)

I need to adapt this code to ensure that it is understood that ty9e is later than ty9s.

Can anyone suggest an adaptation that will change the value of ty9e to midnight the next day when the value of ty9s = "0" (midnight)

 

[yky]

Midnight is special. If it is the beginning of a time period, then, it is 0. If it is the end of a time period, then, it is 1.

Set a cell's format to time, enter 24:00, copy and paste by value to another cell and you'll see 1, not 0, in the pasted cell.

So, after "ty9e = WorksheetFunction.VLookup...", you may want to put an IF statement to set ty9e to 1 if it is midnight.

 

[Ark68]

Thanks so much yky for both the explanation and solution!!

So, I went with ...

 ty9e = WorksheetFunction.VLookup((Me.cb_ps_crew.Value & "1"), ws_staff.Range("I5:M38"), 5, False)
 if ty9e = 0 then ty9e = 1

That got me wondering now how times even later than midnight have to be coded, for example 1 or 2 am.

 

[yky]

That got me wondering now how times even later than midnight have to be coded, for example 1 or 2 am.

There is a more general solution. If ty9e < ty9s, then ty9e = ty9e + 1. Plus 1 puts the time into the next day. Normally, 1 am is 1/24. 1 am for the next day is 1 1/24 or 25/24.