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I have an ActiveX control which displays models containing a huge number of facets in OpenGL. I use recursion during the building of the models and unfortunately am overflowing the stack.
How does one increase the size of the stack in a COM/ATL dll?
I've tried the compiler option '/F' and linker option '/STACK' without any luck. Is there a way to do this programmatically?
Thanks in advance!
Emil
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As far as i recall, the stack size is not related to a DLL, its the process including the DLL that is deciding on its stack size.
Depending on the amount of information stored on the stack, it would probably be better if you kept only a pointer to a struct with the info you need at each level of recursion. You could event count the recursion level and keep some information into an array that is dependant on the recursion level.
Here are a few points you might want to investigate too.
How many levels deeps are you getting into ?
Are you sure you're not simply entering an infinite recursion which does overflow the stack.
Is the recursive function having too many parameters, could you simplify these parameters and pass in a struct pointer ?
Are there too many local variables in my recursive function ?
Every time you enter a function, there is a number of bytes being reserved in the stack, each parameter passed to a function could be taking some stack space so if you recurse on a function that requires 40 bytes for its parameters it can add up quickly. Also, local variables do take space on the stack.
Having a recursive function with "char somearray[512]" isnt convenient in a recursive function since on each recursion level, 512 bytes will be reserved for that level.
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 Hello I'm new to COM and ATL. I need some help regarding add-ins. I want to make an add-in for the Visual Basic Editor, displayed as a dialog-style window, using Visual C++. I know that COM and ATL are used, but I have no idea how to start.
Also, the displayed dialog needs to keep track of the currently selected item (i.e. a Form, or a control within a Form) and read it's properties (color, text, etc.).
I have looked over the articles discussing add-ins, but they don't address my situation. Any help would be greatly appreciated.
Thanks.
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Hi,
Here is the part of the EXE code:
if (FAILED (CoInitialize (NULL)))
{
return FALSE;
}
...
...
HRESULT hr;
IWebBrowser2* pWebBrowser = NULL;
hr = CoCreateInstance (CLSID_InternetExplorer, NULL,
CLSCTX_LOCAL_SERVER, IID_IWebBrowser2,
(LPVOID*)&pWebBrowser);
====> hr is 0x80070005 - Access is denied.
This is happening only with Windows XP/SP2. On the same PC with SP1, it works fine also it works fine on W2K.
Can someone PLEASE help me to solve this issue?
Thanks
SenPy
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Maybe you now need to CoInitializeSecurity() ?
XP2 now has a more secure web browser system and this is a good thing.
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Hi
I have handle to window to activeX control i want to get Idispatch of
this control in other thread. I use following code in same thread to
get interface pointer but when i call same function in other thread
it does not work
void fn(HWND *h)
{
::CoInitialize(NULL);
CWnd *c=CWnd::FromHandle(h1);
LPUNKNOWN pUnk =c->GetControlUnknown();
::wsprintf(a,"%p",pUnk);
::AfxMessageBox(a,0,0);
if(pUnk)
{
LPDISPATCH pDisp=NULL;
pUnk->QueryInterface(IID_IDispatch, (LPVOID*)&pDisp);
//doing some function with idispatch
}
}
this function works fine in one thread but in other thread it return
Iunknown pointer NULL. If any body knows solution plz reply me as
soon as possible. Remember i am not working with control that
register themselves i mn working with MSFlexGrid control.
Thanx in advance
Danish Ali
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in one thread all is fine because u are in one apartament. to access interface in another thread i use COM marshaling. CoMarshalInterThreadInterfaceInStream<->CoGetInterfaceAndReleaseStream functions or GIT table.
but i didn't use it on remote threads. hm. maybe this is the part of sollution.
4apai
There're no impossible tasks. There're tasks that required infinite period of execution time.
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thnx for reply but what u r saying is good when i m creating
my own controls but i m not creating new ActiveX control. I m using the one that already exsist like MSFLEXGRID and others......... it is not necessary that i should access it from other thread but if i can access from the same thread it is also fine i m basicaly injecting code in running process to get the properties of activeX control ......... Recently i got succeded it through subclssing but the code i use was of MFC so it was working fine on applications build in MFC but it is not working on other application like the ones build through VB I was accessing the same control MSFlexGrid but it doesnot work there.....
Plz reply ASAP
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Hi, I am a little new to the code project. Any way, I have Windows ME and do not have the Microsoft .Net FrameWork. I was wondering if their is a program that can notify me when i get new mail. I would like it if it can surport 2 gmail acounts(My Father and I have one gmail account each and we share the same computer). I would like it to stay in the System tray. I will give a gmail invite to the one you can find a program that I can use. Thanks 
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Wrong forum ?
I believe this should be going in the lounge, no?
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may be he like to go for GMAIL forum
-----------------------------
"I Think It Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk
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I use IGraphBuilder, IVideoWindow and IMediaControl to create simple video player. I assume it's window to desktop window so there's a problem. How can i show all items that were on desktop in my video player window(make them popup) and save their functions(run,rename,...)?
Can somebody help me pleace.
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Hello!!
At the beginning I'd like to apologize for posting on group that doesn't fit this subject, but I haven't found any that would fit it.
I am looking for informations, hints or source codes about how to display system resources (cpu load, mem usage...) on active desktop.
I know that I need to use WMI for it and I have found documentation about the WMI on MSDN with WScript example that shows cpu load, but I don't know how to put those informations on a web page (active desktop) and refresh them continuously.
Could anybody help me?
Best regards,
Marcin
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Does anyone know how to convert the HRESULT into something readable?
The obvious approach: FormatMessage(.....) gives the description than can be understood by any normal human!
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hi,
Do Some Googling On HRESULT.
there are two MACROS SUCCESS, FAILURE,
Once U Get The HRESULT, u Extract Severity code,Error code tec...
go through
"http://www.codeguru.com/Cpp/misc/misc/system/article.php/c3859/"
by
baijumax
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_com_error err(hResult);
CString strError = err.ErrorMessage();
Thanks
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I've developed a component (.dll file) on my desktop computer using VC++ 6 running Windows XP SP1. When I run regsvr32 on the the desktop computer, the .dll registers and I'm able to access the component from a client program.
When I attempt to register the same component on a laptop computer (also running Windows XP SP1), regsvr32 runs quietly (not showing a "DllRegisterServer in file.dll succeeded" message or any other message), the .dll doesn't register and I'm not able to access the component from a client program.
Does anyone know why this could happen?
If I run the regsvr32 command in a batch file (on the laptop), %ERRORLEVEL% gets set to 3. Anyone know where I could find out what that might mean?
-Rob
__________________________________________________________________________
....you guys start coding and I'll go ask them what they want it to do....
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This is probably a dependency problem. Run the VC dependency walker (depends.exe), and check that all the dependencies for your DLL are present and correct. You can compare the result with your own working computer if you need. If any of the dependencies are missing, or not on the path, then it is likely that the DLL will not register.
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Thanks, that was it. MFC Release DLLs were on the laptop, but not the Debug DLLs. regsvr32 registers a Release version of the .dll properly.
__________________________________________________________________________
....you guys start coding and I'll go ask them what they want it to do....
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How can i check if a CLSID is valid or not without actually creating an object i.e without calling CoCreateInstance
and if CLSIDFromAppID function fails is it necessary that the AppID is wrong
thanks
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Hello MailMonty,
One simple way to check whether a CLSID is valid is to check for the existence of that clsid in the registry under HKEY_CLASSES_ROOT.
Regards,
Bio.
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Hello,
I'm hosting WebControl (internet explorer) in desktop application (C++/MFC, and/or C#). Application loads some html pages stored locally. Those pages contain some JavaScript code, which looks something like this:
function GetMYNAME () {
var win = window.parent;
while ( (win.MYNAME == null) && (win.parent != null) && (win.parent != win) )
{
win = window.parent;
}
return win.MYNAME;
}
This looks for object named MYNAME in all framesets of the page. I know how to communicate with JavaScript, I know how to call functions and to get my functions called from JavaScript, but I can't figure out how to do this. I'm thinking that I need somehow to put object named MYNAME into window hierarchy, but I don't have any idea how to do this. Through that object JavaScript needs to call some functions.
Can someone point me the right way?
I can't change that JavaScript because it's auto generated from many sources and the requirement is that it must look just like that. I found out that one can do what I want, but with window.external property, but that's not allowed.
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Hey Guys,
I´m fairly new to COM and well .. here comes my newbie question!
I am programming in C++ and I am trying to add a toolbar to the mail window of Outlook, and I want to know the best way to go about it. My current thinking is to use the NewInspector event to add the toolbar to the window. But I´m wondering if there is an easier way - like to add it by default or something during OnConnection.
One other thing.. If the right way to go about it is to use the NewInspector event, what is its dispid? (I think thats what its called ) I swear I have turned every stone in MSDN and I can´t find it! I have tried Outlook Spy as well and its not there either. Is there any resource that contains the events and their respective dispids anywhere?
Your humble COM newbie.. Glad for any help whatsoever!![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif)
P.S By Dispid I mean the following piece of code in SINK_MAP.
SINK_ENTRY_INFO(1, __uuidof(Outlook::ExplorerEvents),/*dispinterface*/ (This number here), OnNewInspector, &OnSimpleEventInfo)
Karl Stiller
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