BaseEdit.CustomDisplayText Event

using DevExpress.XtraEditors;

System.Windows.Forms.Timer timer = new System.Windows.Forms.Timer();

private void Form1_Load(object sender, EventArgs e) {
    progressBarControl1.Properties.ShowTitle = true;
    progressBarControl1.Properties.PercentView = false;
    progressBarControl1.CustomDisplayText += ProgressBarControl1_CustomDisplayText;
    timer.Tick += timer1_Tick;
}

private void btnStartTimer_Click(object sender, EventArgs e) {
    timer.Enabled = false;
    int totalSeconds = 5;
    DateTime startTime = DateTime.Now;
    progressBarControl1.Tag = startTime;
    progressBarControl1.Properties.Minimum = 0;
    progressBarControl1.Properties.Maximum = totalSeconds;
    progressBarControl1.Position = progressBarControl1.Properties.Minimum;
    timer.Enabled = true;
}

private void ProgressBarControl1_CustomDisplayText(object sender, DevExpress.XtraEditors.Controls.CustomDisplayTextEventArgs e) {
    ProgressBarControl pb = sender as ProgressBarControl;
    if (pb.Tag == null) { e.DisplayText = "Stopped"; return; }
    int currentPosition = Convert.ToInt32(e.Value);
    int maximum = pb.Properties.Maximum;
    int secondsLeft = maximum - currentPosition;
    TimeSpan timeLeft = new TimeSpan(0, 0, secondsLeft);
    string s = string.Format("{0:dd} days {0:hh} hours {0:mm} minutes {0:ss} seconds", timeLeft);
    e.DisplayText = s;
}

private void timer1_Tick(object sender, EventArgs e) {
    ProgressBarControl pb = progressBarControl1;
    if (pb.Tag == null || !(pb.Tag is DateTime)) return;
    DateTime startTime = (DateTime)pb.Tag;
    DateTime currentTime = DateTime.Now;
    int elapsedSeconds = Convert.ToInt32((currentTime - startTime).TotalSeconds);
    int totalSeconds = pb.Properties.Maximum;
    if (elapsedSeconds >= totalSeconds) {
        (sender as System.Windows.Forms.Timer).Enabled = false;
        pb.Tag = null;
        BeginInvoke(new MethodInvoker(delegate 
        {
            MessageBox.Show("Stop");
        }));
    }
    pb.Position = elapsedSeconds;
}

Imports DevExpress.XtraEditors

Public Sub New()
    InitializeComponent()

    ProgressBarControl1.Properties.ShowTitle = True 
    ProgressBarControl1.Properties.PercentView = False 
    AddHandler ProgressBarControl1.CustomDisplayText, AddressOf ProgressBarControl1_CustomDisplayText
    AddHandler timer.Tick, AddressOf timer1_Tick
End Sub 

Dim timer As System.Windows.Forms.Timer = New Timer()

Private Sub buttonStartTimer_Click(sender As Object, e As EventArgs) Handles buttonStartTimer.Click
    timer.Enabled = False 
    Dim totalSeconds As Integer = 5
    Dim startTime As DateTime = DateTime.Now
    ProgressBarControl1.Tag = startTime
    ProgressBarControl1.Properties.Minimum = 0
    ProgressBarControl1.Properties.Maximum = totalSeconds
    ProgressBarControl1.Position = ProgressBarControl1.Properties.Minimum
    timer.Enabled = True 
End Sub 

Private Sub ProgressBarControl1_CustomDisplayText(ByVal sender As Object, ByVal e As DevExpress.XtraEditors.Controls.CustomDisplayTextEventArgs)
    Dim pb As ProgressBarControl = TryCast(sender, ProgressBarControl)
    If pb.Tag Is Nothing Then 
        e.DisplayText = "Stopped" 
        Return 
    End If 
    Dim currentPosition As Integer = Convert.ToInt32(e.Value)
    Dim maximum As Integer = pb.Properties.Maximum
    Dim secondsLeft As Integer = maximum - currentPosition
    Dim timeLeft As TimeSpan = New TimeSpan(0, 0, secondsLeft)
    Dim s As String = String.Format("{0:dd} days {0:hh} hours {0:mm} minutes {0:ss} seconds", timeLeft)
    e.DisplayText = s
End Sub 

Private Sub timer1_Tick(ByVal sender As Object, ByVal e As EventArgs)
    Dim pb As ProgressBarControl = ProgressBarControl1
    If pb.Tag Is Nothing OrElse Not (TypeOf pb.Tag Is DateTime) Then Return 
    Dim startTime As DateTime = CType(pb.Tag, DateTime)
    Dim currentTime As DateTime = DateTime.Now
    Dim elapsedSeconds As Integer = Convert.ToInt32((currentTime - startTime).TotalSeconds)
    Dim totalSeconds As Integer = pb.Properties.Maximum
    If elapsedSeconds >= totalSeconds Then 
        CType(sender, System.Windows.Forms.Timer).Enabled = False 
        pb.Tag = Nothing 
        BeginInvoke(New MethodInvoker(Sub()
                                            MessageBox.Show("Stop")
                                        End Sub))
    End If 
    pb.Position = elapsedSeconds
End Sub