Timer.Period Property
Syntax
Period as Integer
The time (in milliseconds) between executions. Periods of less than or equal to zero default to a value of 1 millisecond.
The default value is 1000. The rate that a Timer can actually fire depends on the speed of the host computer, the operating system, and other tasks the computer is doing. It is possible to set Period to a value that cannot be achieved by the computer that is running the application.