int $windowId; 

int $controlId;

int $index;

// First create a User Window to place the Control on

$windowId = `createWindow "MyWindow"`;

// Create the User Control on the Window. 

$controlId = `createDropList $windowId`;

// Add some items to the Drop List.

addDropListItem $controlId "Item 1";

$index = `addDropListItem $controlId "Item 2"`;

addDropListItem $controlId "Item 3";

// Select the item whose index we just got.

selectDropListItem $controlId $index;