TabStrip?

How do I select a tab in design time from the TabStrip Control? Now I can only place controls on the first tab....

You can't select the Tabs on a TabStrip at design time.
During run-time you must add code your self to place the controls on the TabStrip.
One common way of doing this is to add controls to different picture boxes and the hide and show these pictureboxes when the user changing tabs.

You can also use the SSTab control instead of a TabStrip which is easier to use but takes up more system resources.

Thanks! :)