Api: Timegettime() - timeGetTime() returns negative value

Ok, I have this weird problem, using timeGetTime() API. I'm using it in a small application, that shows current system up-time. Now, it has been working fine, but at some point, it started returning negative values, and it counts backwards (decrementing the value)...

I don't know if system uptime has anything to do with it; my system has been running for approximately 690 hours, and I first noticed a problem a few days back. Now, I know there is perfectly reasonable explanation for this, but it escapes me. I tried searching for this problem on the web, but had no success.

For example, timeGetTime() at some point started returning negative values: -2484000000, and counts down, to -2483999999, -2483999998, etc...

Is it just my comp freaking out, or Windows was not designed to run for so long? I don't want to restart it, but if that's the only way...

Oh, btw, I'm using it inside Visual Basic app, but I would hope that has nothing to do with this weird problem

Thanx in advance...

 

 

 

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This is a flaw in the windows timeGetTime function (not a bug), and is deterministic behaviour.

The windows SDK states:


so every ~50 days one of your counters will reset before the other does
and when you take the difference of the two you will get a negitive number.

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