VC++ and JS interop using Chakra

jstest.cpp

#include<Windows.h>
#include<jsrt.h>
#pragma comment(lib,"jsrt.lib")
int WINAPI wWinMain(_In_ HINSTANCE hInst, _In_opt_ HINSTANCE hPrevInst, _In_ LPWSTR param, _In_ int iSW)
{
    JsRuntimeHandle runtime;
    JsContextRef context;
    JsValueRef result;
    unsigned currentSourceContext = 0;

    // Your script; try replace hello-world with something else
    const TCHAR script[] = L"(function(){return \"Hello\";})()";

    // Create a runtime. 
    JsCreateRuntime(JsRuntimeAttributeNone,JsRuntimeVersion11, nullptr, &runtime);

    // Create an execution context. 
    JsCreateContext(runtime,nullptr, &context);

    // Now set the current execution context.
    JsSetCurrentContext(context);

    // Run the script.
    JsErrorCode e = JsRunScript(script, currentSourceContext++, L"", &result);
    if (e)
        return 1;

    // Convert your script result to String in JavaScript; redundant if your script returns a String
    JsValueRef resultJSString;
    JsConvertValueToString(result, &resultJSString);

    // Project script result back to C++.
    const wchar_t* resultWC;
    size_t stringLength;
    JsStringToPointer(resultJSString, &resultWC, &stringLength);

    MessageBox(NULL, resultWC, NULL, MB_ICONINFORMATION);

    // Dispose runtime
    JsSetCurrentContext(JS_INVALID_REFERENCE);
    JsDisposeRuntime(runtime);
    return 0;
}