>Help me to understand the way classes work.
>
>If I create a timer class in my project. Then I use this class on a form. How can I programatically control the interval property outside of this form?

Steven,
When you put it on a form it's a subclassed object belonging to form as with any other object like a textbox. If you have a reference to form then you can change it. ie:

with oMyForm.myTimer
 .Interval = 3000
 .Reset
endwith

Cetin