A program to show how to create count down timer using Microsoft Visual Basic 6 programming language.

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Program Listing

Option Explicit

Private m_StopTime As Date

Private Sub cmdStart_Click()
Dim fields() As String
Dim hours As Long
Dim minutes As Long
Dim seconds As Long

    fields = Split(txtDuration.Text, ":")
    hours = fields(0)
    minutes = fields(1)
    seconds = fields(2)

    m_StopTime = Now
    m_StopTime = DateAdd("h", hours, m_StopTime)
    m_StopTime = DateAdd("n", minutes, m_StopTime)
    m_StopTime = DateAdd("s", seconds, m_StopTime)

    tmrWait.Enabled = True
End Sub

Private Sub tmrWait_Timer()
Dim time_now As Date
Dim hours As Long
Dim minutes As Long
Dim seconds As Long

    time_now = Now
    If time_now >= m_StopTime Then
        Me.WindowState = vbMaximized
        tmrWait.Enabled = False
        lblRemaining.Caption = "0:00:00"
    Else
        seconds = DateDiff("s", time_now, m_StopTime)
        minutes = seconds \ 60
        seconds = seconds - minutes * 60
        hours = minutes \ 60
        minutes = minutes - hours * 60

        lblRemaining.Caption = _
            Format$(hours) & ":" & _
            Format$(minutes, "00") & ":" & _
            Format$(seconds, "00")
    End If
End Sub