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I have an API with code distributed over several DLL's. I now want to create a single DLL with functions which will be forwarded to the several existing DLL's. Very much on the same line as the Windows Kernel.DLL is implemented. Do I have to write code to generate such thing, or, are there settings in the VCPP IDE to achieve this the Microsoft way.
I am thinking of something like:
_MyFunction=Existing.Dll:?MyFunction@YKKKK@Z
LateNightsInNewry
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You've kinda answered your own question:
"I now want to create a single DLL"
"Do I have to write code to generate such thing"
You have to write the dll.
However, it sounds like you could write a tool to generate the code from a config file with the mappings the way you want (_MyFunction=Existing.Dll:?MyFunction@YKKKK@Z).
...cmk
Save the whales - collect the whole set
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cmk wrote: You've kinda answered your own question:
No, I've Not, you don't understand the question!
The Windows KERNAL.DLL is implemented by sending a Call to each function on to another DLL within the appropriate operating system. Kernal.DLL actually does not contain any excecutable code. There is also no secret about the Binary part of Forwarding. Microsoft has implemented this mechanism for donkies years, it ensures that a 32 bit PE Binary runs equally on systems from Win95 thru Win 2000.
The question is: Is there an existing tool to Achieve this:-
i.e.:
- Do I Achieve this through some obscure settings in the Projects\Settings Dialog? (Use a Microsoft Tool)
- Do I achieve this through some obscure .DEF File Syntax (Use a Less Known Microsoft Tool)
- Is the Only way to achieve this by writing Code which during Run time generates a Binary of a DLL to achieve the result (Develop my Own Tool)
I Will develop my Own Tool if required, but, before embarking, would like to know if there is any need to do so.
LateNightsInNewry
-- modified at 21:11 Saturday 22nd April, 2006
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LateNightsInNewry wrote: No, I've Not, you don't understand the question!
Calm down, actually i do understand the question.
You mention that you found somewhere else that you can use a def file and use _MyFun=NTDLL.?Another@YKKKk@Z syntax.
I am well aware of how to use a def file, however, redirection to another module is not documented in MSDN:
http://msdn2.microsoft.com/en-us/library/hyx1zcd3(VS.80).aspx[^]
As far as i was concerned you could only use the "=" syntax to rename an export within the given module.
I'll be interested to see if <export name="">=<module>?<function|data> syntax works (actually i think i'll try whipping up a small test now).
You use "NTDLL." as the module name - can you specify the extension e.g. "MYMOD.DLL" or "MYMOD.EXE" (for cases where both a dll and exe may exist with the same name) ?
[EDIT]
Actually a quick search found (and others):
http://www.osix.net/modules/article/index.php?id=728[^]
I had assumed you would have to do something like:
http://www.woodmann.com/fravia/fragas1.htm[^]
[/EDIT]
...cmk
Save the whales - collect the whole set
-- modified at 23:27 Saturday 22nd April, 2006
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The problem is that it is not documented as such. I got the answer from:
http://msdn.microsoft.com/msdnmag/issues/0203/loader/default.aspx
Look at the attached project files.
tried it, and it works! Just be sure to get the Name Decorations right.
LateNightsInNewry
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For All those Reading:-
I got an Answer from Elsewhere
Microsoft has a Method for this:-
1. Start a New Project for MyNewApi.DLL
2. Create a Text File: MyNewApi.DEF
3. Make an Entry: LIBRARY=MyNewApi
4. Create a New Section: [EXPORT]
5. In the [EXPORT] section: write:
_MyFun=NTDLL.?Another@YKKKk@Z
LateNightsInNewry
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Since you don't have Windows experience, definitely stay away from MFC - you need solid Win32 knowledge to use it well.
Honestly, that list is a pretty tall order for someone with no experience. I don't use .NET but I'm pretty sure the BCL has classes to do all of those items you listed. (well, #2 isn't a coding issue, it's just a matter of creating the right registry entries)
--Mike--
Visual C++ MVP 
LINKS~! Ericahist | NEW!! PimpFish | CP SearchBar v3.0 | C++ Forum FAQ
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Can you define what you mean by BCL? If it's part of .NET I cannot use it 
I've got a BS in Computer Science, but they made us use Java I just finished building a an application for Windows, and it took me about a week and a half... and it works great, so I've got *some* experience with Windows and Visual C++ now.
By the way, which is easier to port to .NET, MFC or straight up Windows calls?
-- modified at 16:38 Saturday 22nd April, 2006
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chasetoys wrote: Can you define what you mean by BCL?
It's the Base Class Library, which is part of .NET.
Kevin
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Goes to Show, a BSC does no longer confer any knowledge onto the recipient.
I also assume that the 'They Made Us use Java' means that 'They' had secret agents and snipers out to shoot and kill on sight anyone found to take any interest in computer science, including browsing in second hand shops for books on CPP, Books written by Matt Pietreck, or, in general, taking any interest in how a computer works and achieves it's goals.
Become Real! If You're interested in computers, don't forget java, it has it's uses, and start to learn how the thing works!!!
LateNightsInNewry
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Maybe I've been a bit harsh, we all had to start somewhere.
Use MFC, it's far easier than the SDK approach you appear to be taking. You can write quite involved applications in it, without ever meeting a WindowProcedure!
Before you embark on a project you outlined, follow the 'Scribble' tutorial, and spend six months playing with it. Develop your App incrementally, a lot of the functionallity you mention can be added later. Don't forget, Microsoft did not start by writing Windows 2000, and offering a cut down version named DOS 3.1. It was the Otherway around. If you keep close to the MFC Concept, and build on the fact that java and C++ have similar structures and sntax, you'l get there.
Best of Success
LateNightsInNewry
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All of us would like to run before we can crawl
LateNightsInNewry
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When I'm writing my own WndProc() with callback enabled,
Should I always make the following default statement after switching on the message? Does it automatically know to call 'MyWindowProc'? If not shouold I recursively call MyWindowProc? Thanks! :
LRESULT CALLBACK MyWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam){
default:
return DefWindowProc(hwnd, uMsg, wParam, lParam);
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Yes, you Must on Pain of your program no longer responding!
You should ALWAYS call the Default procedure appropriate for your window.
The way windows works, is, it sends messages, thousands of them. A Window Procedure gives you a chance to act on selected messages. (Each Key Press, or Mouse Move will send a Message to your procedure, which in most cases you would not want to handle. if you do not pass them on, the keyboard and mouse will stop to function as soon as you put the mouse in the window. ) As a matter op protocol, you should pass on any messages you do not handle down the chain, for someone else to pick up and handle. You do this by calling the Default Procedure. Windows will take care of despatching your unhandled messages ( which are most) to the next in the chain.
Note: DefWindowProc(...)is the procedure for generic windows. Dialogs and Controls have different default procedures.
LateNightsInNewry
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farshad.f wrote: i wanna...retrieve some information from a mail...
What mail?
farshad.f wrote: should i create a protocol to write my mail in that way?
I doubt it since other protocols (e.g., SMTP) already exist?
"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain
"We will be known forever by the tracks we leave." - Native American Proverb
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hi and a big hello!
i wanna code a new server to control a pc.but with abiliy to be upgrated in future.does anybody know about plugin?
how can i use it in my program?
-- modified at 12:49 Saturday 22nd April, 2006
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Can anyone tell me the differences between *.doc and *.txt file format. How can we access the plain text in the *.doc file format.
HelpMe
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*.txt is a plain text file where the characters are stored in plain ASCII format. You can read these files with fstream.
*.doc is a Compound file commonly used by the MS Word application. This files contains various formatting instructions aswell as text. The easiest way to read is by using Word Automation.
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beardy janggut wrote: Can anyone tell me the differences between *.doc and *.txt file format.
Since a file can have any extension regardless of what it contains, it's impossible to say. You can save a file in Notepad with a .doc extension just as you could save a file in Word with a .txt extension. A file's name and contents are only relevant to the application that created it.
"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain
"We will be known forever by the tracks we leave." - Native American Proverb
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How to implement the dirctory enumerator for the directory having files with the path length more than 260 bytes?.
WIN32_FIND_DATA structure used in the FindNextFile() limits the cFileName to MAX_PATH which is defined as 260.
If we are trying to implement the directory enumerator for the Japanese language, then it is quite possible to have paths beyond 260 bytes.
During that time, FindNextFile will fail to get the elements.
Please let me know for any work around for the same.
Thanks in advance
-Sandeep
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Instead of using MAX_PATH use a Unicode string.
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A Unicode app can create a file with a full path longer than MAX_PATH characters, but cFileName is not the full path, it's just the name+extension of whatever was found. This cannot exceed MAX_PATH TCHARs.
--Mike--
Visual C++ MVP
LINKS~! Ericahist | NEW!! PimpFish | CP SearchBar v3.0 | C++ Forum FAQ
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Windows allows to create the file names beyond 260 bytes ( allows upto 255 characters).
If we take the japanese OS, file name and extenstion with 150 characters can take more than 300 bytes. This is something cFileName cannot handle I think.
Any suggetions on this front?.
Thanks in advance
Sandeep
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