How would I convert a System (.net) C++\CLI String^ into a MFC C++ LPCTSTR string.
It is very easy to get a LPCTSTR into String^, but so far found nothing on doing it the other way around.
If you have Visual Studio 2008 or above, you should be able to do this using the C++/CLI marshaling library, like so:
#include <msclr\marshal.h>
using namespace System;
using namespace msclr::interop;
...
String^ cliString;
marshal_context context;
LPCTSTR cstr = context.marshal_as<const TCHAR*>(cliString);
More information on marshaling between types on MSDN: Overview of Marshaling in C++
You might want to try Marshal::StringToHGlobalUni, Marshal::StringToHGlobalAuto or Marshal::StringToHGlobalAnsi.
Remember the allocated unmanaged strings will need to be freed with Marshal::FreeHGlobal.
来源：https://stackoverflow.com/questions/9782669/c-cli-system-string-to-mfc-lpctstr