private int DestroyEngine() { int status = Hwr.Close(); if (inkObj != IntPtr.Zero) { Hwr.DestroyInkObject(inkObj); } if (settingObj != IntPtr.Zero) { Hwr.DestroySettingObject(settingObj); } if (resultObj != IntPtr.Zero) { Hwr.DestroyResultObject(resultObj); } return(status); }