How to convert std::wstring to LPCTSTR in C++?

Question

I have Windows registry key value in wstring format. Now I want to pass it to this code (first argument - path to javaw.exe):

std::wstring somePath(L"....\\bin\\javaw.exe");

    if (!CreateProcess("C:\\Program Files\\Java\\jre7\\bin\\javaw.exe", <--- here should be LPCTSTR, but I have a somePath in wstring format..
            cmdline, // Command line.
            NULL, // Process handle not inheritable.
            NULL, // Thread handle not inheritable.
            0, // Set handle inheritance to FALSE.
            CREATE_NO_WINDOW, // ON VISTA/WIN7, THIS CREATES NO WINDOW
            NULL, // Use parent's environment block.
            NULL, // Use parent's starting directory.
            &si, // Pointer to STARTUPINFO structure.
            &pi)) // Pointer to PROCESS_INFORMATION structure.
    {
        printf("CreateProcess failed\n");
        return 0;
    }

How can I do that?

Answer 1

Simply use the c_str function of std::w/string.

See here:

http://www.cplusplus.com/reference/string/string/c_str/

std::wstring somePath(L"....\\bin\\javaw.exe");

    if (!CreateProcess(somePath.c_str(),
            cmdline, // Command line.
            NULL, // Process handle not inheritable.
            NULL, // Thread handle not inheritable.
            0, // Set handle inheritance to FALSE.
            CREATE_NO_WINDOW, // ON VISTA/WIN7, THIS CREATES NO WINDOW
            NULL, // Use parent's environment block.
            NULL, // Use parent's starting directory.
            &si, // Pointer to STARTUPINFO structure.
            &pi)) // Pointer to PROCESS_INFORMATION structure.
    {
        printf("CreateProcess failed\n");
        return 0;
    }