^ title

I am trying to do this:

std::string s;

WCHAR w = s;

Also what do you mean what platform i am using?

std::string multi("Test");
std::wstring unicode(multi.begin(), multi.end());

This is the easiest form of multibyte to unicode conversion I know, won't even throw a compiler warning, unlike some solutions like std::copy. Then you can access the single characters of the wstring to get your WCHAR. Though given the little information and SiCranes answer which makes me a bit unsure, so please don't hit me if I misunderstood the actual problem ;)

EDIT:

Well given your next post it seems like it, but you can't simple do WCHAR = wstring eigther, as you can't do char = string. You rather want to do something amongst those lines, right?

std::wstring unicode; // suppose you used the method mentioned above to convert from string towstring
WCHAR w[256] = unicode.c_str() // you can only assign a (w)string to a (w)char array, not a single (w)char

I don't understand, the above code it giving me an error.

basically what i want is something like this

WCHAR convert(std::string s)
{
	WCHAR w;
	//do whatever needs to be done
	return w;
}


std::string s = "something";
WCHAR  w = convert(s);

A string is a sequence of zero or potentially many characters. A WCHAR is exactly one character. You cannot just cram a string into a single character.

What is the actual problem you're trying to solve?

to pass a string in the second parameter here

WCHAR* filename = L"file path...";

D3DX11CreateShaderResourceViewFromFile(device, filename, NULL, NULL, &texture, NULL);

Here is one nice small snippet.

const wchar_t* to_wide( const std::string& strToConvert ) {
  return std::wstring( strToConvert.begin(), strToConvert.end() ).c_str();
}
 

Notice: not working, skip it. I just leave it as is, to be here as warning how NOT to do some things.