// variable "dicomControl" is an instance of Vintasoft.Imaging.Dicom.WebDicomControlJS class.
 
 // get DICOM viewer that is used in DICOM control
 var dicomViewerControl = dicomControl.get_DicomViewerControl();
 
 // create anchor that defines position of text overlay
 var anchor = new Vintasoft.Imaging.Primitives.WebAnchorTypeEnumJS("Top");
 
 // create text overlay
 var textOverlay = new Vintasoft.Imaging.Dicom.WebDicomTextOverlayJS(anchor);
 
 // set text for text overlay
 textOverlay.set_Text("Test");
 
 // get the text overlay collection that is used by DICOM viewer
 var textOverlayCollection = dicomViewerControl.get_TextOverlays();
 // add text overlay to the text overlay collection
 textOverlayCollection.add(textOverlay);
 
 // redraw DICOM viewer
 dicomViewerControl.update();