Countdown Timer Excel VBA - Code crashed excel

Question

Could someone offer an insight into why this crashes my excel, i cant seem to work it out. Im trying to learn VBA and need some advice.

sub timer()

    dim         


        

Answer 1

I'm sure you're not timing space shuttle launches or anything that critical. But if you want to make sure your countdown doesn't take longer than 30 seconds, you can use the Timer function. Here's an example.

Sub NewTimer()

    Dim Start As Single
    Dim Cell As Range
    Dim CountDown As Date

    'Timer is the number of seconds since midnight.
    'Store timer at this point in a variable
    Start = Timer

    'Store A1 in a variable to make it easier to refer
    'to it later. Also, if the cell changes, you only
    'have to change it in one place
    Set Cell = Sheet1.Range("A1")

    'This is the starting value. Timeserial is a good
    'way to get a time
    CountDown = TimeSerial(0, 0, 30)

    'Set our cell to the starting value
    Cell.Value = CountDown

    'Keep executing this loop until A1 hits zero or
    'even falls slightly below zero
    Do While Cell.Value > 0
        'Update the cell. Timer - Start is the number of seconds
        'that have elapsed since we set Start.
        Cell.Value = CountDown - TimeSerial(0, 0, Timer - Start)

        'DoEvents release control ever so briefly to Windows. This
        'allows Windows to do stuff like update the screen. When you
        'have loops like this, your code appears frozen because it's
        'not letting Windows do anything (unless you have this line)
        DoEvents
    Loop

End Sub