int $windowId; 

int $controlId1, $controlId2, $controlId3;

int $rect[ 4 ];

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

$windowId = `createWindow "MyWindow"`;

// Create the User Controls on the Window. Check the middle one.

$rect[ 0 ] = 20; 

$rect[ 1 ] = 20;

$rect[ 2 ] = 100;

$rect[ 3 ] = 40;

$controlId1 = `createRadioButton $windowId -pos $rect -text "Radio 1"`;

$rect[ 1 ] = 50;

$rect[ 3 ] = 70;

$controlId2 = `createRadioButton $windowId -pos $rect -text "Radio 2" -check`;

$rect[ 1 ] = 80;

$rect[ 3 ] = 100;

$controlId3 = `createRadioButton $windowId -pos $rect -text "Radio 3"`;

// Now check the last one, making sure to uncheck the middle one we

// checked before

setRadioButtonCheck $controlId1 false;

setRadioButtonCheck $controlId2 false;

setRadioButtonCheck $controlId3 true;