Cannot convert NI16 * to const wchar_t *, when interfacing with c++

[mashingan]

I'm following the examples of c++iface in the folder $NIM_HOME/examples and 
[irrlicht tutorial 01](http://irrlicht.sourceforge.net/docu/example001.html). 
The interfacing (mainly) worked fine but not in the function that need type 
wchar_t. I'm already used WideCString but the compiler gave me those error.

The workaround was by replacing every function call that need wchar_t * with 
emit pragma, but is there any better way to do it?

nim snippet
    
    
    ...
      device.setWindowCaption(newWideCString("Hello world! - Irrlicht Engine 
Demo"))
      gui.addStaticText(newWideCString("Hello world! This is Irrlicht software 
engine!"),
        rect(10, 10, 200, 22), true)
      ...
    

I changed it with 
    
    
    {.emit:
        [device, """->setWindowCaption(L"Hello world! - Irrlich Engine Demo");
        """, gui, """->addStaticText(L"Hello world! This Irrlicht software 
engine!",
        irr::core::rect<irr::s32>(10, 10, 200, 22), true);
        """].}
    

Also, the opposite was error too (when calling driver.getName(), the c++ 
returned a wchar_t * too but cannot be cast to NimStringDesc, NCString, or NI16)

compiler that I used is cl 
    
    
    $ cl /?
    Microsoft (R) C/C++ Optimizing Compiler Version 19.00.24213.1 for x64
    ...
    

Thanks.