Incorrect character in xml file generated by Boost under VS2008

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I want to creates XML file through Boost library under VS2008. and the content of xml file is as follows:

<Test>
      <TradeMark>DELL™ Logo</TradeMark>
</Test> 

and the code to generate it is

node.put("Test.TradeMark", "DELL™ Logo");

as result, the xml file is

<Test>
  <TradeMark>DELL� Logo</TradeMark>
</Test> 

why there is incorrect character in xml file?

asked 2 mins ago

zangw

124