Visual Studio .NET - : error C2065: 'CFolderDialog' : undeclared identifier

Hi There,
  I need some helps. I try to compile with my little code as following but I get "error C2065: 'CFolderDialog' : undeclared identifier"
thanks

void

 

MyDlg::OnButtonBrowse()

 

{

 

//Folders Browser

 

CString m_strFolderPath = _T( "d:\\Windows" );

 

CFolderDialog dlg( _T( "*.."" ), m_strFolderPath,

this );

 

 

if( dlg.DoModal() == IDOK )

 

{

m_strFolderPath = dlg.GetFolderPath();

 

}

　

}

It could be bacause of any new line char in any parameters of the parameter or also it could be because of undeclared variables and functions or methods..
check here for more info on this
http://cboard.cprogramming.com/cplusplus-programming/12620-error-c2065-undeclared-identifier.html

and check this if this is valid in your scenario where in which you are trying to compile a Microsoft eMbedded Visual C++ 3.0 or eMbedded Visual C++ 4.0 application
 http://support.microsoft.com/kb/892073