Simple routine.  Click a button to increase the time by 6 minutes.

Problem is it only works once unless I click a differnt button.

I thought I could check for PostBack  but that did not fix.

   Protected Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim varEndTime As Date
        varEndTime = lblEndTime.Text

        lblEndTime.Text = DateAdd(DateInterval.Minute, 6, varEndTime)

    End Sub