c++stlwchar-tstdstring

I want to convert std::string into a const wchar_t *

Is there any method? My computer is AMD64.

::std::string str;
BOOL loadU(const wchar_t* lpszPathName, int flag = 0);

When I used: 

loadU(&str);

the VS2005 compiler says:

Error 7 error C2664:: cannot convert parameter 1 from 'std::string *__w64 ' to 'const wchar_t *'

How can I do it?

Solution

  • If you have a std::wstring object, you can call c_str() on it to get a wchar_t*:

    std::wstring name( L"Steve Nash" );
const wchar_t* szName = name.c_str();

    Since you are operating on a narrow string, however, you would first need to widen it. There are various options here; one is to use Windows' built-in MultiByteToWideChar routine. That will give you an LPWSTR, which is equivalent to wchar_t*.