From: Jianwei Sun (jsunDDTI.NET)
Date: Wed Feb 18 2004 - 07:02:05 CST

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You need to query the interface which defines the method "testgateway ",
say if the interace name is "Itest",
You need to do ptrUnknown.QueryInteface(&IItest), and then call that method
on Itest.

Another way of doing that is you can just Declare CComPtr<ITest>,and then
call CoCreateinstance(Clsidfroprogid("clavin.ccalvin")

Like this

{
        //.....
        CComPtr<ITest> spTest;
        spTest.CoCreateinstance(Clsidfroprogid("clavin.ccalvin");

        //call any method defined on spTest, like testgateway()
        //......
}

Study the book <ATL Internals> ,and it gives you a lot of information.

P.S.

I am not Kim, so I am not the expert, and I also learned a lot from Kim's
posts.

-----Original Message-----
From: Distributed COM-Based Code [mailto:DCOMDISCUSS.MICROSOFT.COM] On
Behalf Of Katiyar, Subodh (Path)
Sent: Wednesday, February 18, 2004 7:18 AM
To: DCOMDISCUSS.MICROSOFT.COM
Subject: Re: Passing variant arrays from asp to atl component doesn't work

hi Kim,
i am struck in another problem now.
this invoke method takes progid of another component along with function
name to call like this applicationname.classname:functionname
and then after doing some manipulation on vin param it passes vin ,vout,verr
to component it has to invoke.
can you please guide what should i use for invoking the component i am
trying this.

CComptr<IUnknown>ptrUnknown;
ptrUnknown->Createinstance(Clsidfroprogid("clavin.ccalvin");
now how do i get to invoke the method "testgateway onto this iunknown, i
tried creating a CComQIptr<IDispatch>ptrDispatch,but don't know how to
invoke ,new to it.
could you sujjest some article or a code snippet on invoking an com serevr.
much regards

-----Original Message-----
From: Kim Gräsman [mailto:kim.grasmanLABS2.COM]
Sent: Wednesday, February 18, 2004 1:27 Shaam
To: DCOMDISCUSS.MICROSOFT.COM
Subject: Re: Passing variant arrays from asp to atl component doesn't work

Hi Subodh,

> vin(0,0)="a"
> vin(0,1)="b"
> vin(0,2)="c"
> .....
> and so on i fill till h
> when i try to call this asp page
> i get -> a e b f c g Vame from dbl dim now what could be misbehaving
> in here?

If you mean the order of the elements, that has to do with the layout of the
SAFEARRAY.
I made things easy on myself, and traversed the array data in order, from
first element to last.

I'll bet if you think about this for a while, you'll be able to get the data
in the order you want.

Alternatively, look into SafeArrayGetElement, which will let you pick out
items one by one, at the cost of some performance (but if your arrays are
fairly small, it won't be a problem).

Hope that helps,
Kim

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