MSXML implementing ISAXContentHandler, what on earth am I missing?? - COM Discussion Boards

Re: Calling Com Function Via javascript or VB script

9-Apr-04 18:12

Can any one tell me that how can i call a com / Activex function via javascript and vbscript. Currently i am doing some thing as follows but in web page i get the error that object doesnt support this property or method :

<HTML>
<BODY>

<OBJECT id=MUMSocket1 style="LEFT: 0px; TOP: 0px" classid="clsid:BDBEED17-BE31-475E-966F-28A3F07FDBBD" VIEWASTEXT>
<PARAM NAME="_Version" VALUE="65536">
<PARAM NAME="_ExtentX" VALUE="2646">
<PARAM NAME="_ExtentY" VALUE="1323">
<PARAM NAME="_StockProps" VALUE="0"></OBJECT>


<INPUT type="button" value="Button" id=button1 name=button1 onclick=ini()>

<script language ="javascript" >
function ini(){
MUMSocket1.Initialize () // getting Error here

}

</script>

</BODY>
</HTML>

Milton Karimbekallil11-Apr-04 21:12

Milton Karimbekallil

11-Apr-04 21:12

hi
What you have done to call the ActiveX function is correct only. This is the way to call a com object function on client side thru html-jscript. If still it shows err, the two possibilities that I found are

1) Mostly it will be because of your security settings of Internet explorer. Did u get any message saying "Your current security settings prohibit running activex controls on this page ........". If yes, then no method will get executed. Go to Internet Options--> Security tab--> Custom Level and select all ActiveX related radio buttons to 'Enable'. Open a new explorer window and try. Mostly the problem will be because of this only.

2) Second possibility is, make sure that the component with the given clsid have that method exposed. Search registry for that clsid under HKEY_CLASSES_ROOT\CLSID and go to your clsid. Then go to InprocServer32 SubKey, check the default string value, this will give you the path of the component registered for that clsid. Check whether that dll/ocx has the given function exposed (By referring that dll/ocx to a new vb project or by using OLE Object viewer). Because even if u r sure that the component has that method, the client machine might have an older version installed.

rgds..mil10

HWND problem with list control

krugger8-Apr-04 21:44

krugger

8-Apr-04 21:44

Hi all;

I am having a serious problem with an application that I am currently developing. It is an SDI application consisting of a CdialogBar (Well, some sort of derivation of that class atually). I have to initialise tabs and add list controls and tree controls on them.

This works just fine as I have added initialisation code to the InitDialogBar() function that I have created for the DialogBar. The problem is that I need to fill these controls (list and tree) dynamically. This can only happen when users log onto the program. InitDialogBar() is triggered well before user log-in.

So I have created a function in the DialogBar class to add/remove unnecessary items in the controls when user log-in. I use a global pointer to access this function in the login-dialog stuff. However, I always get the following assertion error:

AFXWIN_INLINE HICON CWnd::SetIcon(HICON hIcon, BOOL bBigIcon)
{ ASSERT(::IsWindow(m_hWnd)); return (HICON)::SendMessage(m_hWnd,

It occurs in line 309 of AfxWin2

Obviously, it is requiring a handle to the DialogBar but I just can’t figure out how to make it work as I am quite new to Visual C++ programming.

Can somebody, please please help me.

Thank you,

Krugger

How can I use a COM?

ilavl8-Apr-04 15:14

ilavl

8-Apr-04 15:14

I registered a COM named "red.ax", and then
1. DEFINE_GUID
2. add the red.lib into the 'link' page
3. CoCreateInstance it.
but it get error when linking:
hehefaintDlg.obj : error LNK2001: unresolved external symbol _CLSID_NvRender4
is it has something to do with the .lib ?
How could I get through it?

Re: How can I use a COM?

Renjith Ramachandran11-Apr-04 2:01

Renjith Ramachandran

11-Apr-04 2:01

try to include _i.c and .h files

I want to change Myself..Can u help me? Smile | :)

Re: How can I use a COM?

ilavl11-Apr-04 20:36

ilavl

11-Apr-04 20:36

I've resolved the problem.
it was Init_guid.h havent been included.

MSXML implementing ISAXContentHandler, what on earth am I missing??

Senkwe Chanda8-Apr-04 10:01

Senkwe Chanda

8-Apr-04 10:01

I've read the docs and a few online examples of how to implement the ISAXContentHandler interface. Simple enough.

In my "stdafx.h" file, I make sure to add the following two lines.

import <msxml4.dll>
using namespace MSXML2;

Cool, I then created a class derived from ISAXContentHandler, call it ContentHandlerBase. I implemnted each of the ISAXContentHandler methods such that they all return S_OK. Then, I created a class that derived from ContentHandlerBase, call it ContentHandlerImpl. In this class I only implemented one method, say ISAXContentHandler::startElement for example.

As soon as I tried to instantiate this class via ContentHandlerImpl* chi = new ContentHandlerImpl(), I got "Cannot Instantiate Abstract Class" along with a whole bunch of ...

HRESULT MSXML2::ISAXContentHandler::raw_ignorableWhitespace(unsigned short *,int)' : pure virtual function was not defined

for example, for each of the ISAXContentHandler methods even though they HAVE been implemented in the base class.

I don't get, it. I downloaded an online sample and it compiled fine. Laboriously poring over the differences between my code and the sample code has proved fruitless as I can't see anything I did wrong Frown | :-(

Anybody have any clues as to what might be the problem?

Thanks.

Senkwe

Woke up this morning...and got myself a blog

Re: MSXML implementing ISAXContentHandler, what on earth am I missing??

Anonymous8-Apr-04 10:17

Re: MSXML implementing ISAXContentHandler, what on earth am I missing??

8-Apr-04 10:17

Try to use "raw_interfaces_only" attibute in import statement or rename methods in your implementation class ("raw_XXX").
Edward

Senkwe Chanda8-Apr-04 10:45

Senkwe Chanda

8-Apr-04 10:45

Hi, thanksk alot for the response Smile | :)

Unfortunately, your suggestion doesn't seem to work. I've already tried including "raw_interfaces_only", didn't work I'm afraid. I've just now tried your "raw_XXX" suggestion and I still got the same compile error.

Thanks again for the suggestions though Smile | :)

Woke up this morning...and got myself a blog

Re: MSXML implementing ISAXContentHandler, what on earth am I missing??

Anonymous8-Apr-04 13:12

Re: MSXML implementing ISAXContentHandler, what on earth am I missing??

8-Apr-04 13:12

That's strange.
What's in *.tlh/*.tli files ?
Your derived classes should match interfaces in the *.tlh files.
Also try to remove all tlh and tli files and rebuild all.

Edward

Senkwe Chanda12-Apr-04 7:45

Senkwe Chanda

12-Apr-04 7:45

Hi Edward. Thanks for the reply again. I took a peek at the projects *.tlh file and my eyes glazed over so I deleted it and rebuilt all. Same thing happened. Looks like I'm going to have to dig into the file and look for anything odd. Thanks for your help Smile | :)

I'll post this problem to another newsgroup as I'm sure someone must have experienced this before.

Smile | :)

Woke up this morning...and got myself a blog

COM events

El'Cachubrey7-Apr-04 22:43

El'Cachubrey

7-Apr-04 22:43

Hi
I realize this utterly frequent qustion here, but once again
i had com object and wont to inject this one to my application.This object had events and i want use this too.
I create smart pointers for object by import derective.And
how i can implement events in easyest way???Use MFC or other generic class (not ATL).Any pointers will appreciated

Thanks.

Namespace Extension

harishail7-Apr-04 2:09

harishail

7-Apr-04 2:09

How to refresh the tree view of the namespace extension on addition or deletion of a node at runtime

Re: Namespace Extension

_Magnus_8-Apr-04 0:10

_Magnus_

8-Apr-04 0:10

Use SHChangeNotify()

/Magnus

- I don't necessarily agree with everything I say

Marshaling interface pointers in DirectX

Martin Hinchy6-Apr-04 15:12

Martin Hinchy

6-Apr-04 15:12

I came across some MFC sample code recently that uses DirectShow to render MPEG files in a static control.

The sample code creates a number of DirectShow interface pointers in the main dialog (eg. IGraphBuilder, IMediaSeeking, IMediaControl etc) and then calls methods on these interfaces from a worker thread.

My question is, shouldn't these interface pointers all be marshalled to the worker thread using something like CoMarshalInterThreadInterfaceInStream()? I didn't think that pointers to COM interfaces could be shared amongst threads unless they were marshalled, or is DirectX different?

Note: The calls to the DirectShow interfaces from the worker thread seem to work perfectly fine.

Regards
Martin

Re: Marshaling interface pointers in DirectX

Rory Solley6-Apr-04 22:25

Rory Solley

6-Apr-04 22:25

In theory, the interface pointers should be marshalled if the thread is in a separate apartment to the main thread i.e. CoInitialize() has been called in the worker thread. However, if the main thread is a MTA, the worker thread will "share" the apartment and marshalling isn't explicitly necessary (generally, the "server" will AddRef() the interface before passing it on). The reason it currently works is most likely because the code is relatively simple and there is no contention over releasing/unmarshalling of interfaces between the main and worker threads. The marshalling mechanism becomes much more important when interfaces are passed over process boundaries.

Re: Marshaling interface pointers in DirectX

Anonymous8-Apr-04 10:27

how to develop the ATL based Netmeeting wrapper

8-Apr-04 10:27

You are right, the interface pointers must be marshalled when passed between apartments.
But MS doesn't always follow it's own rule. DirectX objects mostly use registered as "both" (which mean that whatever apartment you created them in, no proxy will be created), so it shouldn't cause any problem to pass the interfaces like that.
But unfortunately they will do the same (I believe that was a IGraphBuilder in DX 8.0 that I noticed was doing this) with the callback interfaces, i.e. if you created DX object and your callback object in the STA and pass the callback interface to DX object, the methods of your object might be called from any thread. (btw, I observed this with some shell interfaces as well)

Edward

hmstone5-Apr-04 17:58

hmstone

5-Apr-04 17:58

Hi there.I read the article named Make the Internet Your Office with NetMeeting by Suresh G. Nair .But I am not familiar with ATL.I dont kown how to develop the ActiveX® Template Library (ATL)-based NetMeeting wrapper,and how to use the code offered by Nair in this article. can anybody help me?

Renaming COM object

PaleyX5-Apr-04 2:12

5-Apr-04 2:12

I have a COM object I wrote in VC6 C++ a couple of years aago - I want to rename it and use it another project - how do I do that? No matter how much I change the name in the source files the old name still exists.

If it is called foo and I want it to become bar I have changed all references to foo I can find in the source files to bar yet when I come to reference it it is called foolib - is there a utility to rename a project?

Rugby League: The Greatest Game Of All.

Steve S5-Apr-04 2:29

Steve S

5-Apr-04 2:29

In this context, does "all source files" include (a) the IDL/ODL file and any associated .REG or RGS files?

Steve S

PaleyX5-Apr-04 5:52

5-Apr-04 5:52

I believe so - I have done a search on all the files looking for the name to rename.

Rugby League: The Greatest Game Of All.

vprashu5-Apr-04 8:15

vprashu

5-Apr-04 8:15

Delete the old object and clean your registry. Make sure the .rgs file is correct.

prashu

PaleyX5-Apr-04 13:27

5-Apr-04 13:27

Done all that - it just won't go away - It's quicker just to write the thing again from scratch with a different name than it is to attempt to rename it.

Rugby League: The Greatest Game Of All.

PaleyX5-Apr-04 14:13