Events in RTC-client - COM Discussion Boards

Do your computer run behind a router?if so,you must configure the router to open the ports needed by your application

If you want to be a great programmer,then never stoplearning

yes that might be the problem.
but i don t know how to configure it.
Nat - Wan - Adsl -.....
Where is this configuration ????* Confused | :confused:

C U SOON

currently, i try to have a list control (for logging message purpose) where it will highlight the entire row with red if it carry out error information. else, it will just highlight the entire row with green.

The Michael Dunn' s article on custom draw give me a good information:
http://www.codeproject.com/listctrl/lvcustomdraw.asp

However, I need some mechanism so that in my custom draw message handler, I know whether this row carry out error information or not.

I try to do the following approach. I use the lParam to store whether that row is error information row.

In the method which i insert item, I have

LVITEM lvi;
lvi.lParam = ERROR_INFORMATION;

Then, in my custom draw message handler, I do the following

NMLVCUSTOMDRAW* pLVCD = reinterpret_cast<nmlvcustomdraw*>( pNMHDR );
// this is error message
//
if(pLVCD->nmcd.lItemlParam == ERROR_INFORMATION)

However, this approach just wont work. The lParam value I get in the custom draw message handler, isn't same as the lParam value I put in the insert item method.

Can anyone advice me how should my implementation be?

Thanks. Smile | :)

cheok

Hi,
I am registering a standalone (out-of-process) COM server (exe developed in VB 6) manually using the '/regserver' switch. Upon registration, I am able to see the Class ID and other registry information in OLE viewer. However, I am unable to create an instance of the server in OLE viewer (or via external code). I am getting the following error message (in OLE viewer):

IClassFactory::CreateInstance failed
No system message defined <severity>: SEVERITY_ERROR facility: <unknown facility=""> ($800A01AE)

As you can see the error message does not help much except providing an error code ($800A01AE). I have researched this error code to a significant extent and the best match for the error source is 'Class does not support automation or expected interface'. This comes from a single article on Microsoft support (Article ID : 244493), which is in the context of accessing COM objects from ASP (not the situation I am facing). Following are some investigation results that might help to isolate the source of the problem:

1> The COM registration/unregistration process seems to be working fine. I have done a detailed OLE viewer + registry search to come to this conclusion. Another means to support this statement is the fact that I have other similar COM servers, which are instantiating successfully and they have exactly similar information in the registry also showing up in OLE viewer.

2> The dependencies of the COM server in question are all correctly resolved.

A peculiar behavior is that I have a base system (Win2000 server), on which I have the COM server registered and instantiating successfully. The problem arises when I unregister the server and try to register it again. This is when things break. I am kind of a COM newbie so there may be angles that I do not appreciate. Any help in this regard is highly appreciated.

Regards,
Gautam.

Hi
I try to find some code for creating
a drop down menu for a IExplorer button e.g
the menu for The ShellView Visual Styles >> Thumbnails,
Tiles,Icons,List,Details .

I have a toolbar button via Registry and i have a COM Browser Helper Object
but i want to create the Dropdown menu to operate beter and set options for my
BHO.
Please help Smile | :)

)

I am new to ActiveX. I just want to create s sample appln. I want to create an UI using activex control. Which contians a button called 'New Add' and a edit box called 'Name'.

How to create a dialog in MFCActivexControl wizard and this should be added in the MFC dialog.

In MFC dialog which contains a editbox namely 'Test', when the Add New button is pressed, the value in the 'name' edit box should be added to the 'Test' edit box of the mfc dialog.

Could any one tell me how to proceed this??

I have created a ActiveX component. I use IIS. It works well on my m/c, as the component is registerd on it, but doesn't work on other m/c's in the network. Who to register my ActiveX on other machins, when used with IE <object> tag.
And who to communicate with the server fron this ActiveX.
Plz help...
Thanx & Regards..
Vinod.

Hello,

I'm a junior developer trying to build a Windows client application using the Microsoft RTC API, and have encountered some problems when trying to pick up events generated by the RTC core. I have built the application upon a MFC "Hello world" application found in Visual Studio, and the Window and all events (messages) that I myself trigger work fine. The application crashes the first time I expect an event coming from the COM-object (which should be picked up by the Event method of the IRTCEventNotification-interface and "forwarded" to the Window using SendMessage with LPARAM, WPARAM, etc....)

The debugger is yielding the following output (when the application crashes):

Hello.exe!_com_ptr_t<_com_IIID<rtccorelib::irtcprofile2,&_guid_4b81f84e_bdc7_4184_9154_3cb2dd7917fb> >::_Release() Line 822 + 0xd C++
Hello.exe!_com_ptr_t<_com_IIID<rtccorelib::irtcprofile2,&_guid_4b81f84e_bdc7_4184_9154_3cb2dd7917fb> >::~_com_ptr_t<_com_IIID<rtccorelib::irtcprofile2,&_guid_4b81f84e_bdc7_4184_9154_3cb2dd7917fb> >() Line 306 C++
Hello.exe!CMainFrame::~CMainFrame() + 0x1a C++
Hello.exe!CMainFrame::`scalar deleting destructor'() + 0x14 C++
rtcdll.dll!6213ae21()
rtcdll.dll!621230da()
rtcdll.dll!621230b3()
rtcdll.dll!62126418()
rtcdll.dll!6212a0de()
user32.dll!77d38734()
user32.dll!77d38816()
user32.dll!77d3c63f()
user32.dll!77d3e905()
mfc71d.dll!_AfxActivationWndProc(HWND__ * hWnd=0x00050f86, unsigned int nMsg=1131, unsigned int wParam=10, long lParam=16294216) Line 449 + 0x1a C++
user32.dll!77d38734()
user32.dll!77d38816()
ntdll.dll!7c90eae3()
user32.dll!77d389cd()
user32.dll!77d385a4()
user32.dll!77d38a10()
user32.dll!77d4e2b9()
user32.dll!77d461c6()
user32.dll!77d5a92e()
ntdll.dll!7c96e0d4()
ntdll.dll!7c94a5d0()
ntdll.dll!7c926abe()
ntdll.dll!7c926a44()
ntdll.dll!7c926abe()
ntdll.dll!7c926abe()
ntdll.dll!7c9268ad()
ntdll.dll!7c91056d()
ntdll.dll!7c95db5c()
ntdll.dll!7c926abe()
ntdll.dll!7c9268ad()
ntdll.dll!7c91056d()
ntdll.dll!7c91b686()
ntdll.dll!7c91b298()
ntdll.dll!7c9106eb()
ntdll.dll!7c960bcc()
ntdll.dll!7c915b4f()
oleaut32.dll!77114885()
ntdll.dll!7c915b4f()
ntdll.dll!7c91056d()
msvcr71d.dll!_free_base(void * pBlock=0x0012fb2c) Line 103 C
user32.dll!77d5a294()
Hello.exe!_bstr_t::Data_t::`scalar deleting destructor'() + 0x25 C++
Hello.exe!_bstr_t::Data_t::Release() Line 681 + 0x1c C++
Hello.exe!_bstr_t::_Free() Line 571 C++
0015ce50()
user32.dll!77d86060()
ntdll.dll!7c915b4f()
user32.dll!77d70577()
user32.dll!77d7052f()
mfc71d.dll!CWnd::MessageBoxA(const char * lpszText=0x0042ab10, const char * lpszCaption=0x0042aa6c, unsigned int nType=0) Line 2711 + 0x1b C++
Hello.exe!CMainFrame::DoGetProfile(unsigned short * bstrUserAccount=0x0015e634, unsigned short * bstrUserPassword=0x0015e704, unsigned short * bstrURI=0x0015e5dc, unsigned short * bstrServer=0x0015e66c, unsigned short * bstrTransport=0x00000000) Line 138 + 0x14 C++
Hello.exe!CMainFrame::Initialize() Line 96 C++
Hello.exe!CTheApp::InitInstance() Line 119 C++
mfc71d.dll!AfxWinMain(HINSTANCE__ * hInstance=0x00400000, HINSTANCE__ * hPrevInstance=0x00000000, char * lpCmdLine=0x00141f4e, int nCmdShow=1) Line 39 + 0xb C++
Hello.exe!WinMain(HINSTANCE__ * hInstance=0x00400000, HINSTANCE__ * hPrevInstance=0x00000000, char * lpCmdLine=0x00141f4e, int nCmdShow=1) Line 25 C++
Hello.exe!WinMainCRTStartup() Line 390 + 0x39 C
kernel32.dll!7c816d4f()
ntdll.dll!7c915b4f()
kernel32.dll!7c8399f3()

Any help to understand what's going on will be greatly appreciated Confused | :confused:

I have just started ActiveX programming. Can anyone tell me how to Create ActiveX control on a Simple SDI application. Syntax for the Create() function.

Also names of good ActiveX Programming Books.

Hi Gajesh,

CoCreateInstance(...) is the API to create an activex control on window.

Syntax:
STDAPI CoCreateInstance(
REFCLSID rclsid,
LPUNKNOWN pUnkOuter,
DWORD dwClsContext,
REFIID riid,
LPVOID * ppv
);
For detailed description of parameters pls. refer to the MSDN.

k once you have successfully created the COM object, you would recive a
interface pointer. Now query this pointer for IOleObject, now using
IOleObject::DoVerb(...) you can see the control.

Well this is the way I used to create the activex control on window. Some
one might have other way TODO same thing.

To start learning COM, Activex following are some good books

Essentil COM
-Don Box
Inside COM
-Dale Rogerson

You can get a tons of information on online MSDN....

All the best !

Wink | ;)

Cheers,
Vishal

I have used a mschart component in my form,
but I have no idea how to use the my customised image to replace the background color of bars.

Thanks

Good Morning,
How can i enable IE to show my custom image format in it's window? IE supports by default some image types like BMP, JPG, GIF etc. How can i register my own file type in this default type list?
Thanks in advance.

Yes, you can open your custom files in IE. For that you need to do the file
association, its just the matter of some registry entries.

But if your images having custom format, then there must be some native application which can recognise your image format. Do you have somthing like this application?

All the best !

Cheers,
Vishal

Yes, I already have an application that decodes this custom format and a shell extension too. Can you help with the registry keys?

Kind regards.
Pantelis Georgiadis

You have to set the MIME filter for that.

Insert content type entries
HKEY_CLASSES_ROOT
-MIME
-Database
-Content Type
-application/vnd.app.ext
-CLSID - CLSID for your application
-Extension - Extension of your image files

Entries for extension
-.ext
-ProgID

Entries for ProgID
-ProgID
-DefaultIcon
-Shell
-Open
-Command - C:\\Program Files\\Internet Explorer\\IEXPLORE.EXE %1

This much I can remember...

This all information is available on online MSDN, unfortunatly I lost the
link for that, you can get the link from online MSSN. It would take some time
to search, well I had one unsuccessful attempt. If you get that link pls.
fwd it to me.

You can take a reference from the MFC sample active document container/server. See how this application is making the registry entries.

Hope this helps you !

All the best !

Cheers,
Vishal

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/shell/programmersguide/shell_basics/shell_basics_extending/fileassociations/fileassoc.asp[^]

This is one link I got !

Cheers,
Vishal

Hi,

I've an ActiveX control (.OCX) written in VC++ 6.0.

I am trying to use this control in C# Web Service - but everytime I invoke any of ActiveX method the service fails.

I wrote another small Windows-Application in C# to test if I can access ActiveX in C#...

Now the only problem is when I try to access ActiveX from C# Web Service.

Any help?

Thanks!

Hi,

I am new to COM. I just started learning the COM. Its interesting. I am learning from "Inside COM" book. I just want to be a COM programmer. So do i need to learn all COM stuffs. I read till ClassFactory and little abt Containment and Aggregation.

Do I need to learn all the other cocepts to be a good programmer like IDispath,Monikers(its not given in this book) and other threading concepts and even Aggregation in detail.

could anyone guide me on this regard?

Also I want to learn ATL too. I have done projects in ATL too. But want to be good prgmer in that too.

urssmiling wrote:
Do I need to learn all the other cocepts to be a good programmer like IDispath,Monikers(its not given in this book) and other threading concepts and even Aggregation in detail.

IDispatch - yes, at least if you want to interoperate with braindead languages such as VBScript, or want to use automation functionality exposed by many applications.

Monikers - it doesn't hurt. Especially not if you are to create your own monikers.

Threading concepts - absolutely.

urssmiling wrote:
could anyone guide me on this regard?

This book is highly recommended[^]

urssmiling wrote:
Also I want to learn ATL too. I have done projects in ATL too. But want to be good prgmer in that too.

You should most definately learn ATL as well, if you are going to do serious COM programming. You will become sick of all the boiler plate code otherwise. Smile | :)

Good music: In my rosary[^]

Thanks for ur reply. I have some more clarifications. Could you be more clear about IMonikers about whehter its really a needed one. Also about aggregation and containment.

Also could u specify me about learning ATL. I have Inside ATL book. Do I need to learn about all the ATL object and so on. could you guide me more on this.

Thanks.

Hi,

I am using ADSI api and want to extract Net BIOS name from DNS using C++.
I got following sample from MSDN. But this sample is not compiling. I got following compilation error:
error C2065: 'IADsNameTranslate' : undeclared identifier

I have Included "activeds.h" and "Iads.h" in the header files but still I am not able to get the desired result.

If someone has worked on it then please sent me the working code.

#include "activeds.h"
#include "Iads.h"

int wmain( int argc, wchar_t *argv[] )
{
IADsNameTranslate *pNto;
HRESULT hr;
hr = CoCreateInstance(CLSID_NameTranslate,
NULL,
CLSCTX_INPROC_SERVER,
IID_IADsNameTranslate,
(void**)&pNto);
if(FAILED(hr)) { exit 1;}

hr = pNto->InitEx(ADS_NAME_INITTYPE_SERVER,
CComBSTR("aDsServer"),
CComBSTR("aUser"),
CComBSTR("userDomain"),
CComBSTR("passwd"));
if (FAILED(hr)) { exit 1;}

hr =pNto->Set(ADS_NAME_TYPE_1779,
CComBSTR("cn=jeffsmith,cn=users,dc=Fabrikam,dc=com"));
if(FAILED(hr)) {exit 1;}

BSTR bstr;
hr = pNto->Get(ADS_NAME_TYPE_NT4, &bstr);
printf("Translation: %S\n", bstr);

SysFreeString(bstr);
pNto->Release();
}

Thanks and Regards
Ankur

Hello Friends,

I want to learn COM Programming. So, Please suggest me the path to be taken for becoming a Advance COM Programmer.

From Basic to Advance to Expert??

Neelesh K J Jain.

Hi Neelesh ,

TO start with COM the best resources are books and online MSDN.
Here are some good books.

Essential COM
by-Don Box
Inside COM
by-Dale Rogerson

Have fun !

Cheers,
Vishal

hi i m new to the field of activex and i want to know that are activeX (internet activex) made in the vc or vb are capable of self registering. or had to something extra to
register them. particularly the (internet activex) controll. if not that what functions will be used to register them.
i had made the (internet activex) that play the movie on the page i want to know that when user will visit my page then ocx will be selfdownloaded
and selfrejisted to that client pc. or what will happen.

ddd

tasleem143 wrote:
activeX (internet activex) made in the vc or vb are capable of self registering. or had to something extra to
register them.

The components are capable of self registering themselves, provided they have the necesary permissions to do so.

The Internet Activex control should be singed by any of the singing authorities otherwise when it tries to register itself then u will get a security warning.

tasleem143 wrote:
what functions will be used to register them

To register an control use "Regsvr32.exe"

tasleem143 wrote:
i want to know that when user will visit my page then ocx will be selfdownloaded
and selfrejisted to that client pc. or what will happen.

For a component to download itself on to the client machine, create a Cabinet (.cab) file for that component along with the .inf file, mentioning that the control has to register itslef once it get downloaded on to the client machine.

place "cab" file in the virtual directory.