private void btnStartCall_Click(object sender, EventArgs e)
{
lblHours.Text = "00";
lblMinutes.Text = "00";
lblSeconds.Text = "00";
onCall = true;
btnStartCall.Enabled = false;
btnEndCall.Enabled = true;
callLog = new CallLog(DateTime.Now, null);
callLog.StartCallLog();
t = new Timer();
t.Interval = 1000;
t.Tick += new EventHandler(t_Tick);
t.Start();
}