Add Doctype to XML document

I am creating an xml document like this:

Set XMLdoc = Server.CreateObject("MSXML2.DOMDOCUMENT.4.0")
XMLdoc.insertBefore ...
XMLdoc.appendChild ...

I want to add Doctype to this xml document. How do I do that? Looks like I cannot use XMLdoc.CreateProcessingInstruction to add Doctype.
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Om PrakashCommented:
Please check the example:
Set XmlDocument1 = Server.CreateObject("Msxml2.DOMDocument.3.0")
XmlSource = "<?xml version=""1.0"" encoding=""UTF-8""?>" & vbCrLf & _
"<!DOCTYPE FREIGHT SYSTEM ""test2004123001.dtd"">" &
vbCrLf & _
XmlDocument1.validateOnParse = False

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>  Looks like I cannot use XMLdoc.CreateProcessingInstruction to add Doctype.

Why not?

sCharSet  = "UTF-8"
Set oInstruction = oXML.createProcessingInstruction("xml", "version=""1.0"" encoding=""" & sCharSet & """")
oXML.insertBefore oInstruction, oXML.childNodes.item(0)
dj_user2Author Commented:
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