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1. 建立一个新的vb工程
2. 引用 Microsoft XML,版本 2.0 或以上
3. 在窗体form1上建立按钮 cmdCreateXML 和 cmdGetBinary
代码：
Option Explicit
Dim oDoc As DOMDocument
Dim DOCINPATH As String
Dim XMLOUTPATH As String
Dim DOCOUTPATH As String
Private Sub cmdCreateXML_Click()
Dim oEle As IXMLDOMElement
Dim oRoot As IXMLDOMElement
Dim oNode As IXMLDOMNode
DOCINPATH = App.Path & "\DocInput.doc"
XMLOUTPATH = App.Path & "\XmlOuput.xml"
Call ReleaseObjects
Set oDoc = New DOMDocument
oDoc.resolveExternals = True
注释： Create processing instruction and document root
Set oNode = oDoc.createProcessingInstruction("xml", "version=注释：1.0注释：")
Set oNode = oDoc.insertBefore(oNode, oDoc.childNodes.Item(0))
注释： Create document root
Set oRoot = oDoc.createElement("Root")
Set oDoc.documentElement = oRoot
oRoot.setAttribute "xmlns:dt", "urn:schemas-microsoft-com:datatypes"
注释： Add a few simple nodes with different datatypes
Set oNode = oDoc.createElement("Document")
oNode.Text = "Demo"
oRoot.appendChild oNode
Set oNode = oDoc.createElement("CreateDate")
oRoot.appendChild oNode
Set oEle = oNode
注释： Use DataType so MSXML will validate the data type
oEle.dataType = "date"
oEle.nodeTypedValue = Now
Set oNode = oDoc.createElement("bgColor")
oRoot.appendChild oNode
Set oEle = oNode
注释： Use DataType so MSXML will validate the data type
oEle.dataType = "bin.hex"
oEle.Text = &HFFCCCC
Set oNode = oDoc.createElement("Data")
oRoot.appendChild oNode
Set oEle = oNode
注释： Use DataType so MSXML will validate the data type
oEle.dataType = "bin.base64"
注释： Read in the data
oEle.nodeTypedValue = ReadBinData(DOCINPATH)
注释： Save xml file
oDoc.save XMLOUTPATH
MsgBox XMLOUTPATH & " is created for you."
End Sub
Function ReadBinData(ByVal strFileName As String) As Variant
Dim lLen As Long
Dim iFile As Integer
Dim arrBytes() As Byte
Dim lCount As Long
Dim strOut As String
注释：Read from disk
iFile = FreeFile()
Open strFileName For Binary Access Read As iFile
lLen = FileLen(strFileName)
ReDim arrBytes(lLen - 1)
Get iFile, , arrBytes
Close iFile
ReadBinData = arrBytes
End Function
Private Sub WriteBinData(ByVal strFileName As String)
Dim iFile As Integer
Dim arrBuffer() As Byte
Dim oNode As IXMLDOMNode
If Not (oDoc Is Nothing) Then
注释： Get the data
Set oNode = oDoc.documentElement.selectSingleNode("/Root/Data")
注释： Make sure you use a byte array instead of variant
arrBuffer = oNode.nodeTypedValue
注释： Write to disk
iFile = FreeFile()
Open strFileName For Binary Access Write As iFile
Put iFile, , arrBuffer
Close iFile
End If
End Sub
Private Sub cmdGetBinary_Click()
DOCOUTPATH = App.Path & "\DocOutput.doc"
Set oDoc = New DOMDocument
If oDoc.Load(XMLOUTPATH) = True Then
注释： Save the Doc as another file
WriteBinData DOCOUTPATH
MsgBox DOCOUTPATH & " is created for you."
Else
MsgBox oDoc.parseError.reason
End If
End Sub
Private Sub Form_Unload(Cancel As Integer)
ReleaseObjects
End Sub
Private Sub ReleaseObjects()
Set oDoc = Nothing
End Sub
4. 建立word文档DocInput.doc.
5. 保存文档在工程目录下
6. 运行程序点击cmdCreateXML 按钮.一个 XML 文件XmlOuput.xml 就建立了.
点击 cmdGetBinary 按钮就可以生成word文档 DocOutput.doc.
按照上面的方法，同样可以将任意的二进制数据存为xml，然后再重新生成二进制数据
可以用于web传输等等可以使用xmlhttp的地方
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