This property is a Microsoft extension to the W3C DOM.
The reason property is read-only and returns a string detailing the reason for the
error. Validation errors also include the URL of the Schema and the node within the Schema
that corresponds to the error.
In the following example the file 'staff.xml' is loaded which includes an error: the second
employee element does not include an 'ssn' attribute which is required by the DTD. If a parse
error occurs, as it does in this case, an alert displays the number of the line where it
occurs, and the reason why.
Where no parse error occurs, the errorCode
property returns 0.
<employee ssn="123456" pay="3">
Set objXMLDoc = CreateObject("Microsoft.XMLDOM")
objXMLDoc.async = False
Set ParseErr = objXMLDoc.parseError
If ParseErr.errorCode <> 0 Then
alert("Error on Line: " & ParseErr.line & vbCrLf & ParseErr.reason)
The alert displays the following message:
Error on Line: 10
Element content is invalid according to the DTD/Schema.