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TechyMaila wrote: Ok, so then what member of the VARIANT type can I use to store a pointer?
Well, to put it simple: you don't.
Why? Because it's a design issue. Your server should behave like a black box that solves a well defined problem. How the box looks inside should be hidden from "users" or clients. By exposing internal pointers to your client, you are putting some of the responsabilities of the server on the client which is undesirable.
I suggest you use an index instead.
You could even have an interface that enumerates the tree nodes, e.g. IEnumTreeNodes, that provides you with an interface for each tree node letting you manipulate each node, e.g. ITreeNode.
Perhaps I've misunderstood your problem. If this is the case, post again and explain it further.
Hope this helps
--
Roger
It's supposed to be hard, otherwise anybody could do it!
Regarding CodeProject: "resistance is pointless; you will be assimilated"
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Hi Roger,
Thanks a lot for replying. Well, I believe ITreeNode is the solution to my problem. Well actually, I gotta fill a tree view in the COM server from the client. Now that can only be done when I get the TREEITEM from the last InsertChild so that multiple levels of child nodes can be added. So to pass the pointer to a TREEITEM, I was trying using void**. If I am not allowed to use void, then what can I useto pass the address of HTREEITEM? My COM server is InProc.
Do you have anyother suggestions?
---
With best regards,
A Manchester United Fan
The Genius of a true fool is that he can mess up a foolproof plan!
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TechyMaila wrote: what can I useto pass the address of HTREEITEM
If I've understood your problem correctly, you actually don't need to pass the address. You only need a way to keep track of the node that you got from the previous call to InsertChild(), right?
What I suggested in my previous post was to use an integer to be able to refer to the node you got from InsertChild().
An ugly solution, which I don't recommend, is to pass the address as a long and type cast it to a HTREEITEM pointer. This will work on systems that are 32-bit, but will surely fail if built for 64-bit systems, in other words not a very good solution. 
Always design with distribution in mind. It will make your design better and protect you from unwanted surprises when your software is used where you didn't think it would be used.
A better solution is to still pass a 32-bit integer through the interface, but the integer is mapped to a HTREEITEM pointer that you keep in an internal map inside the server.
No need for overkill here, simply mask the HTREEITEM address with 0xffffffff to get the 32-bit identifier.
--
Roger
It's supposed to be hard, otherwise anybody could do it!
Regarding CodeProject: "resistance is pointless; you will be assimilated"
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Alright!!!  Thanks a lot for your help. I ahd never thought about 64 bit systems coz.. frankly, I have never seen one.
Anyways, thanks once again. ![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif)
---
With best regards,
A Manchester United Fan
The Genius of a true fool is that he can mess up a foolproof plan!
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Hello!
I came accross the article http://www.codeproject.com/tips/dirclean.asp[^] which is about some handy utility. Shell extension DLL is provided. Can somebody please tell me how to register this shell extension trough console maybe? I really don't want to learn about shell extensions right now. All I want, is to use this utility.
P.S. I'm reposting this question in this message board. I made a mistake and post it to the C++ board.
Best regards,
Rostfrei
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aren't you able to register the dll using regsvr32 ?
Somethings seem HARD to do, until we know how to do them.
_AnShUmAn_
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What does it mean when the value for the InprocServer32 key is garbled gibberish, as though it's been encrypted?
How does the system find the right component to launch when the value is scrambled like that?
I found this key in my registry:
HKEY_CLASSES_ROOT\CLSID\{0000002F-0000-0000-C000-000000000046}
Default - oleaut32.dll
InprocServer32 -
,(GnBmGFa=nZ7]6MJA+rGIANT_AntiSpyware_Files>M5KDYSUnf(HA*L[xeX)y<br />
GfXmE~Yz*@5HHM+Pw4D]AlwaysInstall>M5KDYSUnf(HA*L[xeX)y<br />
a7I{dV5R1@_YU_&e(5qUPSDK>M5KDYSUnf(HA*L[xeX)y<br />
*c4w146BQ9+]'zoDRy(dAlwaysInstall>M5KDYSUnf(HA*L[xeX)y<br />
ThreadingModel - Both
How does that work?
ø¤º°`°º¤ø,¸¸,ø¤º°`°º¤ø,¸¸,ø¤º°`°º¤ø,¸¸,ø¤º°`°º¤ø,¸¸,ø¤º°`°º¤ø,¸¸,ø¤º°`°º¤ø,¸¸,ø¤º°`°º¤ø,¸
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My guesses:
1. It's not really COM data, but some other kind of data being hidden in a very simple fashion.
2. MSAS made that change at install time as part of its protection, and it has a hook that watches for DLLs being loaded by COM, and undoes the obfuscation on the fly.
--Mike--
Visual C++ MVP 
LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ
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hi,
how can we export data from Excel to Informix Database
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Hi,
I have a Visual C++ application that controls the digital USB camera.
Currently this is done using camera's SDK.
I am looking for vendor-independent ways to communicate with digital cameras.
1. Does WIA API support viewfinder mode, i.e. can I have "live preview" from the camera in my application?
2. Can I communicate with digital camera directly through PTP (Picture Transfer Protocol) from my application, thus avoiding WIA?
Is there some kind of API available for PTP?
Thanks a lot.
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yes this is the same thing which i am also looking for....
Loka Samastha Sukhino Bhavanthu..!!!
( May all beings be happy and free )
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I just finished another Security update and now this code throws an exception.
CString myStr(L"test");
_bstr_t t = _bstr_t(myStr);
This worked until the sercurity update. I've tried to AllocateSysString to get a BSTR as well as CComBSTR instead of CString and nothing seems to work.
Does anyone know what happened to the wrapper class and how to successfully create a _bstr_t object?
Thanks
Chris
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Mike,
Thanks for the response but no that doesn't work either.
All will work in MFC but in my ATL DLL everything that worked yesterday now won't!
I've tried createding a BSTR and then using that to create the _bstr_t, using a variant (_variant_t) even creating a BSTR and then using the attach method on the _bstr_t and everything throws and exception!!!!!!
It is I can't find any information in MSDN about why it isn't working either.
Chris
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Sometime I can be so stupid!!
There was no problem with _bstr_t
There was a problem were I changed the length of an integer array from 500 to 200 and FORGOT to change the init loop. The overwriting of memeory just happend to show up in the _bstr_t object.
Sorry for all the wasted time.
Chris
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Whenever I hit something that looks like a system issue, I use the following rules;
#1: Suspect my code
#2: See rule #1
It's stood me in good stead for over 20 years now, and only once has it failed, when I discovered a locking bug in C-ISAM for DOS. That was real fun to find.
Steve S
Developer for hire
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i have craeted two reports named 'main' and 'subreport'. main report contains subreport. after setting code when i run that application. only content of main report is displayed and content of subreport is not displayed
Regards
manoj
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HiAll,
Can anyone tell me how to remove the "Create Shortcut" context menu from a particular Desktop icon?
Thanks and Regards,
Anil
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How do i pass a structure as a parameter from a function in assembly(vb.net) to a function in vb6.0 dll?
Thanks
Mahesh
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Hi,
In an ATL COM+ application how do I instantiate a well-behaved COM+ object marked as noncreatable?
I read that when instantiating COM+ applications the right way to do it is using the IObjectContext::CreateInstance rather than using CoCreateInstance. However neither is available when using noncreatalbe objects.
If I do it using CComPtr will the object be created in the current context and therefore be well behaved?
Thanks.
-- modified at 0:03 Monday 22nd May, 2006
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AFAIK objects marked non-creatable cannot be instantiated using COxxx APIs. The component will provide a special method to get those object if at all those objects need to be accessible outside.
S o h a i l K a d i w a l a
modified 21-Apr-21 21:01pm.
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Yes, that is so when instantiating outside the COM+ project. What I'm talking about is when instantiating within COM+. Basically, I have a coclass 'A' and a non-creatable 'B'. I want to know the best way to instantiate B from A. If I was instantiating 'A' from another coclass 'C', the right way to do it is using the IObjectContext::CreateObject method. However, that cannot be used to instantiate non-creatable classes, i believe.
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I'm trying to modify a simple ActiveX control, to add some interaction.
When IOleObject::DoVerb is called with OLEIVERB_INPLACEACTIVATE, the control's window is created, and its window procedure gets WM_PAINT and paints the window.
But the control's window procedure still doesn't get mouse messages. Instead, the IUnknown::QueryInterface gets a request for IProxyManager (00000008-0000-0000-c000-000000000046) each time I move or click the mouse. IProxyManager isn't even documented in MSDN.
So, what can I do to get IE to send mouse messages to the window procedure instead of to IProxyManager?
The ActiveX control is being displayed in IE6 from an OBJECT tag. The DLL has been developed using the MS Platform SDK (without MFC or ATL).
Thanks,
Allie
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Hi,
I'm using IE WebBrowser embeded object in my client application.
Is there any way to be informed that server is sending some cookie to my custom browser (without IE cookie "prompt" dialog) before accepting it ?
My client property is set to always allow 1st party cookies and I need to block one specific 1st party cookie from specific domain (guess by cookie name) and accept all other cookies from the same domain.
I've tried to use OnNavigateComplete2 event, but it looks it's too late to block cookie there, I also guess to block cookie it should be enaugh to set
WebBrowser.Document.Cookie to empty string).
Thanks in advance for help!
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