Me.Application.ActiveDocument.Protect(Word.WdProtectionType.wdAllowOnlyReading, _
False, String.Empty, False, False)
object noReset = false;
object password = System.String.Empty;
object useIRM = false;
object enforceStyleLock = false;
this.Application.ActiveDocument.Protect(
Word.WdProtectionType.wdAllowOnlyReading,
ref noReset, ref password, ref useIRM, ref enforceStyleLock);