>I have designed two forms namely 1.Test.scx 2. Test1.scx. In every 10 seconds automatically "Test.scx " form will be dispaly and "Test1.scx" form will be hide. later 10 seconds the "Test.scx" will be hide and "Test1.scx " will be dispaly.
>
>How to wite code?

Run one of the forms.

Start the second form, maintaining an object reference in the first form.

In the first form, show the second form (through the object reference), and hide the second form.

10 seconds later, hide the second form (again, through the object reference), and show the first form.

Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)