How to remove the tags from the xml

Hello guys I using this code to grab the certain text

my problem is how do I grab just the text not the tags. see below the code

xmlExportDoc = "C:\Test\ep.xml"
Dim xmldoc As MSXML2.DOMDocument
Dim xmlInvTitle1 As MSXML2.IXMLDOMElement
Set xmldoc = New MSXML2.DOMDocument
xmldoc.async = False
xmldoc.Load (xmlExportDoc)
Set xmlInvTitle1 = xmldoc.SelectNodes("//exchange-documents/exchange-document[0]/bibliographic-data/invention-title[1]").Item(0)

innovationTitleEN = xmlInvTitle1.xml
MsgBox innovationTitleEN

I get this result

<invention-title lang="de">read this line too</invention-title>

how do I remove the tags

I just want to have in the alert

read this line too

here is my XML

see link below

http://ift.tt/1sZgsB4

thank you all Stackoverflow members in advance

Cheers