int $windowId;

int $radioId1; 

int $radioId2;

int $radioId3;

int $rect[4];

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

$windowId = `createWindow "MyWindow"`;

// Specify the size and position of the first Radio Button

$rect[0]   = 0; // Left

$rect[1] = 0;   // Top

$rect[2] = 100; // Right

$rect[3] = 20;  // Bottom

// Create the first Control on the Window. Make sure to

// set the -first flag so that all three can work together

$radioId1 = `createRadioButton $windowId -text "Option 1" -pos $rect -check -first`;

// Now position the second Radio Button

$rect[0] = 0;   // Left

$rect[1] = 25;  // Top

$rect[2] = 100; // Right

$rect[3] = 45;  // Bottom

// ... and create it

$radioId2 = `createRadioButton $windowId -text "Option 2" -pos $rect`;

// And finally the third Radio Button

$rect[0] = 0;   // Left

$rect[1] = 50;  // Top

$rect[2] = 100; // Right

$rect[3] = 70;  // Bottom

$radioId3 = `createRadioButton $windowId -text "Option 3" -pos $rect`;