winapi - how to convert from LPCSTR to LPCWSTR in c++

Question

additional info im building an application which use the WinHttpOpenRequest Api which requires LPCWSTR for the object name and im using visual studio 2008

Answer 1

The simplest way is to use ATL:

#include <Windows.h>
#include <atlbase.h>
#include <iostream>

int main(int argc, char *argv[]) {
    USES_CONVERSION;
    LPCSTR a = "hello";
    LPCWSTR w = A2W(a);
    std::wcout << w << std::endl;
    return 0;
}

Any memory allocated by A2W (ANSI to Wide) will be freed when the function exits.