{
    // create a confirm dialog with a yes and no button. Specif
    $response = `confirmDialog -title "Confirm"
    -message "Yes or No? It's your choice..."
    -button "Yes"
    -button "No"
    -defaultButton "Yes"
    -cancelButton "No"
    -dismissString "No"`;
    // check response
    if( $response == "Yes" ) {
        print("User says yes\n");
        } else if( $response == "No" ) {
        print("User says no\n");
    }
}

http://nccastaff.bournemouth.ac.uk/jmacey/RobTheBloke/www/mel/GUI_dialogs.html

2-button dialog code

mel - interaction - 2-button dialog code

Mel