// create an annotation viewer
var annotationViewer = new Vintasoft.Imaging.Annotation.UI.WebAnnotationViewerJS("WebAnnotationViewer1");
...

// get image that is focused in annotation viewer
var image = annotationViewer.get_FocusedImage();
// if annotation viewer has focused image
if (image != null) {
    // get annotation controller that is associated with annotation viewer
    var annotationController = annotationViewer.get_AnnotationController();
    // rotate image with annotations in annotation viewer
    annotationController.rotateImageWithAnnotation(
        image,
        45,                                                             // rotation angle in degrees
        "rgb(255,255,255)",                                             // border color
        new Vintasoft.Imaging.WebBorderColorTypeEnumJS("Custom"),       // specify that border color, which is specified by previous parameter, must be used
        true,                                                           // specify that changes must be saved to a source file
        __annotationController_rotateImageWithAnnotation_success,
        __annotationController_rotateImageWithAnnotation_error);
}


/*
 * Image with annotations is successfully rotated.
 */
function __annotationController_rotateImageWithAnnotation_success(data) {
    alert('Image with annotations is successfully rotated.');
}

/*
 * Image with annotations is not rotated.
 */
function __annotationController_rotateImageWithAnnotation_error(data) {
    alert('Image with annotations is not rotated.');
}