how could I validate that tags in word document are missing or damged
(if all start tags have matching pair of end tags)

sample:
<Amend> blblbllblblblb <Article> G </Article>
          <NumAm> 123 </NumAm>

kljkjdkjkskskdflskdjskfjksdjfksdjf
</Amend>

<Amend> blblbllblblblb <Article> G </Article>
          <NumAm> 123 </NumAm>

kljkjdkjkskskdflskdjskfjksdjfksdjf
</mend>

I would like to check if every start tag has its end tag and if not higlight the tags which are missing start or end tag, and also show me where tag is missing (If <Amend> is missing </Amend> or </Amend> is missing <Amend> -show me where is this error in document)

Any XML parser will give you this information. For example, just load the document into an XML editor like Stylus Studio.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference

Can you plizz tell me where to get one free parser
and if I understand you right this Stylus studio is a parser or or just XML editor
sorry for my stupidity but I am new to all this

thnx

Free XML parsers are readily available for example as part of the Java or .NET platforms. There are also plenty of good XML editors, which will give you access to an XML parser. Products like Stylus Studio, XML Spy, and Oxygen do a lot more than just editing and parsing. I suggest you search around to find the tools that meet your need - the information is readily accessible.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference