// Create a Tab and add and additional tab to the main tab.
int $windowId;
int $mainTab;
 
// First create a User Window to place the control on 
$windowId = `createWindow "MyWindow"`;
// create a main tab controller then add a second tab the main tab
$mainTab = `createTab $windowId "Main" `;
int $secondTab = `addTab $mainTab "Second"`;
 
// delete the second tab
deleteTabItem $mainTab 1;