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You could do that - but you don't really need to.
You use the TLS API for "global" variables, that need one instance for each thread - e.g. the variable that stores the value for GetLastError(). Typically, a library allocates a block of memory for all these thread-separate variables.
You could store the parameters in global variables - you would need TLS only if different threads concurrently create new threads.
My question, of course, is different:
Why do you need the information in your DLL, and what are you trying to accomplish?
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I modifying a C MSVC makefile solution I added my own project to this solution which has only 1 project a C makefile project
Whereas my Project is a C++ MFC project
Most of the code for this proect is in 3 Classes The First one
has only one instance where as the others have multiple instances
IS it possible to store the Address of the Object Via NEW in the TLSSetValue ??? for the Class?object which has multiple instances
This would give me a Way of connecting the Thread with the DLL
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Yes, ypou can. In fact, you don't even need to handle the DLL_THREAD_ATTACH notification:
static int slot = TlsAlloc();
CMyState * GetThreadState()
{
INT_PTR value = TlsGetValue(slot);
if (value == 0)
{
CMyState * state = new CMyState();
TlsSetValue(slot, (INT_PTR) state);
return state;
}
return (CMyState *) value;
}
Note that this sample omits all error handling. Especially in (1) TLS slots may already be exhausted, in which case you need to fail gracefully. TLS slots are a very limited resource, so you should use one and only one and only when you really need it. So you'd better design an extensible data structure for your use (rule: play nice wiht others). Also, (2) may throw or return a NULL depending on your memory error handlign settings.
You must, however, handle DLL_THREAD_DETACH (or another "thread is terminating" mechanism) to free the objects you created.
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One more important thing I need to know When Executing CreateThread
What gets Control First The thread stating procedure
or
DLL_ATTACH_THREAD
Thankx
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In answer to this question before, I was advised to look at http://msdn2.microsoft.com/en-us/library/8kche8ah.aspx, which is titled "Determining Which DLLs to Redistribute". It lists these nine DLL's: atl90.dll (Active Template Library); msvcm90.dll msvcp90.dll msvcr90.dll (C Runtime and Standard C++ Libraries); mfc90.dll mfc90u.dll mfcm90.dll mfcm90u.dll mfcmifc90.dll (Microsoft Foundation Classes). But of these nine I can only find msvcm90.dll msvcp90.dll msvcr90.dll anywhere in my folder tree c:\Program Files\ .
The page http://msdn2.microsoft.com/en-us/library/8kche8ah.aspx has at top right corner a window saying "This page is specific to Microsoft Visual Studio 2008/.NET Framework 3.5"; but that page's text also says "As you use DUMPBIN or depends.exe to view your dependencies, use the file list in Redist.txt to see which of the DLLs that your application depends on are Microsoft-supplied DLLs that are part of Visual Studio. Redist.txt is located in the Program Files\Microsoft Visual Studio 2005 directory on the second Visual Studio 2005 product CD or on the DVD.". There seems to be a contradiction here. Please where can I find accurate information?
I tried using a dependency checker, but it listed dozens of .DLL's as needed; presumably most are in Windows and therefore in everybody's computers, and it would be like finding a needle in a haystack sorting through that lot.
I could presumably run the compiled program on another computer to see which DLL's the program needs; but buying a second computer for such a purpose is expen$$$ive.
modified on Monday, December 24, 2007 5:33:11 PM
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Anthony Appleyard wrote: I could presumably run the compiled program on another computer to see which DLL's the program needs; but buying a second
Yeah Probably $ 75.00. You're looking for a Low Spec Machine in order to encounter those problems, so buy a cheap one. If it's too slow to be usefull, does not realy matter. All you want to know is, Does it work at all, and are all required System/MFC DLL's present!
I am familiar with the problem, and have always taken the following approach:-
- My code does not depend on bespoke applications (e.g MS Word etc) to work.
- I work on the lowest level platform that my app is supposed to be supported by. For instance, a current app I am developing is supposed to run on anything from Windows 98 upwards. As a consequence I develop it on a Win98 O/S. Upward compatibility is generally never a problem. i.e. what I write will run under Windows XP
- Where extensions are needed, e.g. In my Current case Named Pipes (Not supported under Win98) I first try to find out from Microsoft what redistributables are available to implement a feature. At least that gives me a List to keep note of, and you know what to include in your package.
On most occasions however, this line runs into the sand. In that case I write my own extension DLL which I own the copyright to, and can freely distribute. This extension DLL is carefully designed to provide the same functionality as the API I want to emulate.
Taking this approach, I found that code generally works without fretting about which System DLL's to distribute with it.
I feel that this problem most often occurs where a developer develops code on a top of the range machine, and sells to customers whith machines not quite so good.
Motto: Make sure you develop on the lowest spec machine that you expect to be supported, and you discover the problems at development stage rather than at the customer support stage. And, believe me, most DLL Distribution questions and problems will either not occur at all, or, if they do you will face them piecemeal during development.
Hope this is helpful
Bram van Kampen
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You should need just 3 of those DLLs - one from each section,
depending on how your project is built...Unicode/non-Unicode,
multithread/single thread.
The easiest solution is to use the redistributable installer
that comes with the VS version you're using.
If you want to just ship the DLLs your app needs, follow the links at that
page you linked to and study carefully.
Those DLLs you need are NOT in the program files folder. They are installed
as side-by-side assemblies in the Windows/winsxs folder. You'll want to
understand how that side-by-side stuff works and how your app's manifest
helps with the DLL versions at runtime.
Have fun 
Mark
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.freetls.fastly.net/script/Forums/Images/coffee.gif)
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Of my current 3 Visual C++ 2008 (free download version) projects, I just now ran one in debug mode, and after I exited the program, Visual C++ listed in its debug output window a list of DLL loadings and unloadings, but all in C:\Windows\ and mostly in C:\Windows\System32\ ; three of them were
'C:\Windows\winsxs\x86_microsoft.windows.common-controls_6595b64144ccf1df_5.82.6000.16386_none_87e0cb09378714f1\comctl32.dll'
'C:\Windows\winsxs\x86_microsoft.vc90.debugcrt_1fc8b3b9a1e18e3b_9.0.21022.8_none_96748342450f6aa2\msvcr90d.dll'
'C:\Windows\winsxs\x86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.6000.16386_none_5d07289e07e1d100\comctl32.dll'
Can I take this as meaning that my program does not need supplied .DLL's to run? Or what?
Would my program run on someone's computer that has Windows 2000 or Windows XL, or does it need Windows Vista?
Would it work if I merely put the required DLL's in the same folder along with the program's .EXE file? Or what would have to be done?
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Hi there,
Please, can anybody give me a hint how to get DNS adresses from local pc(primary and secondary DNS) in the c++?
I have been searching at google, this web but nothing.
I use WMI in the C#.
Thanx a lot.
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Can anybody help me to programm a chart which ist schown in a dxf file ?
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Hi,
I need to create application which should read the .dwg file and display it onto a window. Please help me. I am a newbie for VC++
jakuar
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Hi,
I have a Top Level MDI windows application. From the main frame users can choose a game. The game should open in a new frame window. This frame window should have a different view each time - according the game the user has selected.
How do i intervene with the creation of the views of the frame windows?
I have only one MainFrm class and one CView-derived class, which is enough. All i have to do is tell the view to draw a different backgournd each time (according to the selected game).
Thanks a lot in advance guys.
Snir_ya.
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The selection can be saved in the doc class object, right?
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So in the view class you can use that. I mean, (but I am not sure, since I dont know your implementation), you can handle it in the OnDraw, or in your drawing code. Like...
void CTopLevelMDI_TestView::OnDraw(CDC* )
{
CTopLevelMDI_TestDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
if (!pDoc)
return;
if( pDoc->m_nGameType == 1 )
{
}
else if( ... )
{
}
}
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Excellent. Using the the document as the bearer of the game type solves the problem.
Thakns a lot.
Snir_ya.
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hi to all
I want to copy a directory which have sub-directories.I study CopyFile();
function but as i know it doesn't copy directory and a lot of sub-directory and i don't want to create those sub directory by code because there are a lot of directory How can i solve this problem
thank you in advance
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You can use SHFileOperation API
OR
You have to search all files/folders recursively, also copy/create respectively. CFileFind will help you.
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my code is below but i got error on 7th line where am i wrong plz help
SHFILEOPSTRUCT shFileOpStruct;
shFileOpStruct.hwnd=NULL;
shFileOpStruct.pFrom="C:\\1.txt";
shFileOpStruct.pTo="D:\\1.txt;
shFileOpStruct.wFunc=FO_COPY;
shFileOpStruct.fFlags=FOF_SIMPLEPROGRESS;
if(!SHFileOperation(&shFileOpStruct))
{
::AfxMessageBox("File transfering");
}
else
{
::AfxMessageBox("File not transfering");
}
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rajneshmalik wrote: shFileOpStruct.pTo="D:\\1.txt;
There is a missing "
What error else it shows?
[Added]
One thing I noticed is that you have not initialized all the members of the SHFILEOPSTRUCT object.
Try this...
SHFILEOPSTRUCT shFileOpStruct = { 0 };
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Hi , I have an MFC application whixh is huge already , and I have recently switched to writing new Dialogs using wxWidgets, but this causes unexpected behaviour, if I simlpy create wxWidgets dialogs from the MFC classes, then the program runs fine, but I get multiple icons for the application on the TaskBar, and , if I create the wxDialog as a child of the MFC app - using ::SetParent(...) , then the wxDialog is "locked" onto the main apps client area as if it were a child control, I have tried many things to get this working, even using AssociateHandle(HWND...) to Associate my main app's handle with a wxWindow and trying to ReParent(...) using that as the parent for this wxDialog, all to no avail.
If anybody has any clue whatsoever as to how to get around this strange wxWidgets behaviour, then your help would be appreciated beyond measure.
Thank you
Max
PS: Seasons Greetings 
The tears shed in vain
and the hatred and pain
will be nothing but dust
at the end of the day
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Is NOBODY going to even try to help me out on this one???
Well , anyways , I have found a workaround for the strange behaviour
which causes more than one icon to show up in the taskbar, I'll be
writing an article soon once I've gotten standard behaviour from my code.
Come on guys , where's your Christmas spirit?
The tears shed in vain
and the hatred and pain
will be nothing but dust
at the end of the day
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Max_Power_Up wrote: Come on guys , where's your Christmas spirit?
My guess is that a) lots of folks aren't online over the holiday break, and b) most folks who use wxWidgets (like myself  ) don't usually have both MFC and wx in the same exe and, as such, can't answer your question.
Judy
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Thanks JudyL_FL, I have found that it is necessary to reparent the wxWidgets window to the top-level MFC dialog, this causes wxWidgets to share taskbar resources with the MFC app.
The tears shed in vain
and the hatred and pain
will be nothing but dust
at the end of the day
Hit me on my blog!
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