How accurate is the Interval property in a timer control? For example:

I've inherited a Job Scheduler. The data table contains the time the job is supposed to run. The timer interval is 60000 (every minute). It calls a method in a class which looks at the Hour and Minute of DATETIME() and compares it to the Hour and Minute of the job record. If there is a match, it will spawn the job.

What are the chances that the timer could get called at (for example) 11:59:59 and then get called again at 12:01:01 and bypass anything set for 12:00?

In other words, what is the range/likelihood of intervals when the property is set at 60000? Does the workload on the computer have any effect on this?

Thanks........Rich