y eso que tiene que ver con ¿inteligencia artificial? que es el foro donde estas, lo peor, ¿que no existe google para eso? 
http://abstractvb.com/code.asp?A=1032
http://visualbasic.about.com/od/learnvbnet...vbsbs0801_8.htm
http://www.google.com.mx/search?q=timers+c...firefox&start=0
jejeje....
Timer... pues esat muy sencillo...
Te paso lo que la ayuda de Visual Studio pone
The Timer control, which is invisible to the user, is useful for background processing. A typical use for the timer is checking the system clock to determine if it is time to run a program or application.
If a Timer control has its Enabled property set to True and immediately sets the property False after a single execution, it may generate its Timer event multiple times. This occurs when the Interval property is less than or approximately the same as the execution time for the Timer event. This can be corrected by increasing the value of the Interval property or decreasing the execution time of the Timer event.
Pero la verdad... mejor dale F1 a tu Visual Studio ahi encontraras ejemplos... jeje..
