unrecognized character escape sequence in path name

[EDN Admin]

hi,all, I defined the following path name, but the compiler threw me some warnings:
<pre class="prettyprint CFolderDialog fileDlg(_T( "Choose Output File Folder" ), _T( "I:Visual Studio 2010ProjectsXMLDOMFromVC2XMLDOMFromVC2LabelSVMlibsvm-3.12" ), this);[/code]
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<pre class="prettyprint i:visual studio 2010projectsxmldomfromvc2xmldomfromvc2labelsvmsvmpredictdlg.cpp(88): warning C4129: V : unrecognized character escape sequence
1>i:visual studio 2010projectsxmldomfromvc2xmldomfromvc2labelsvmsvmpredictdlg.cpp(88): warning C4129: P : unrecognized character escape sequence
1>i:visual studio 2010projectsxmldomfromvc2xmldomfromvc2labelsvmsvmpredictdlg.cpp(88): warning C4129: X : unrecognized character escape sequence
1>i:visual studio 2010projectsxmldomfromvc2xmldomfromvc2labelsvmsvmpredictdlg.cpp(88): warning C4129: X : unrecognized character escape sequence
1>i:visual studio 2010projectsxmldomfromvc2xmldomfromvc2labelsvmsvmpredictdlg.cpp(88): warning C4129: L : unrecognized character escape sequence
1>i:visual studio 2010projectsxmldomfromvc2xmldomfromvc2labelsvmsvmpredictdlg.cpp(88): warning C4129: l : unrecognized character escape sequence
[/code]
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whats going on, how to solve this?
cheers

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