web page
http://msdn.microsoft.com/library/default.asp?url=/workshop/browser/hosting/
wbcustomization.asp descripts how to customize theweb browser. And it says
"You can also use this technique to pass whole objects to a page. To do
this, create a method in your IDispatch implementation that passes back the
object you want to make available."<SCRIPT language="JScript">
function MyFunc(iSomeData)
{
   var oCustCalendarObj;
   external.GetCustomCalender(oCustCalenderObj);
   oCustCalerdarObj.doStuffWithIt();
   .
   .
   .
}
</SCRIPT>But how to program in function Invoke? It seems that code like this
won't work:    pDispParams->rgvarg[1].byref = &m_passback; // m_passback is
an object    pDispParams->rgvarg[1].vt = VT_BYREF; //VT_DISPATCH |
//////////////////////////////Prototype of
Invoke/////////////////////////////////////////////////        virtual /*
[local] */ HRESULT STDMETHODCALLTYPE Invoke(             /* [in] */ DISPID
dispIdMember,            /* [in] */ REFIID riid,            /* [in] */ LCID
lcid,            /* [in] */ WORD wFlags,            /* [out][in] */
DISPPARAMS *pDispParams,            /* [out] */ VARIANT *pVarResult,
/* [out] */ EXCEPINFO *pExcepInfo,            /* [out] */ UINT
*puArgErr)//////////////////////////////////////////////////////////////////
//////////////////////////////////////////

I am in hurry. I hope people who know this can give me help.
Or,  I didn't describe things clear?

Hello,

E> My problem is: how can I pass parameters back from c/c++
E> function to JScript?

Obviously, thru a return value of the function ;)

Looks like:

HRESULT MyFunc([in] BSTR What, [in] VARIANT When, [out, retval] BSTR *Result);

— in an IDL file. Here What and When are function arguments, and Result is
a return value. It should be a pointer to the actual return value type (eg
BSTR*, long*, IDispatch**, and so on).

E> And, how to call JScript from C/C?

Hmm. First, you can get the script object from the Web browser control somehow,
probably thru taking its Document property and treating it as a IHTMLDocumentN*
pointer, where N varies. The script object allows to call any of its functions.

The script global variables are also available from the window object properties
(webbrowser.Document.parentWindow, or something like that). Maybe the functions
are also (I have never checked). If yes, then a JScript function is a Function
ActiveX object, that has a call() method to be invoked via late binding.
If no, then you may assign a function to a global variable, to an attribute
of the BODY HTML element, pass it into a C++ function call, and so on, to
give your C++ side an IDispatch* object representing the function. Yep?

If you're using browser interaction intensively, you may even completely
drop the JScript part of the code, as everything can be done right in C++
as well. Subscribe to events, do the things, etc.

(H) Serg