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

Question

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?

Accepted Answer

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*`.

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

Solution

Problem