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VB4:Timer as precise stop-watch

Posted on 1997-08-03
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Last Modified: 2008-03-03
It's a big problem for me, I started a project with Visual Basic 4 and I cannot find a way to use the timer as a proper stop-watch.
I want to start the timer, to stop it when a user click on the mouse and get the time between, I need something very precise (millisecond).
It is possible with Visual Basic. I need an answer very quickly because if it's not, I will have to choose another programming interface.
Thanks a lot.
Stephanie
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Question by:stephany080397
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Solo earned 150 total points
ID: 1429465
Use the GetTickCount API call, very accurate as it returns the number of milliseconds that have elapsed since Windows was started.
Store the initial result, and re-call the API every time u need to get an elapsed period, and just calculate the difference to get the elapsed time.
Define like this :
Public Declare Function GetTickCount Lib "kernel32" Alias "GetTickCount"() As Long

and use like this :
Dim T0 As Long   'Initial time
Dim T1 As Long   'Current time

...
T0 = GetTickCount   ' "Start" the timer, i.e.begin to count time
....
Private cmdStop_Click()
   T1 = GetTickCount - T0   ' Difference in milliseconds
...
End Sub

Well, hope it helps, bye


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