var instance = new Vintasoft.Twain.WebTwainDeviceAcquireModalResultJS(acquireModalState, imageAcquiringProgressValue, acquiredImage, errorMessage);
var value; // Type: string
value = instance.get_ErrorMessage();
function get_ErrorMessage() : string;
Return Value
A string that describes an error if acquireModalState == WebTwainAcquireModalStateEnumJS.ScanFailed; otherwise, null.
