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Hello
I want to use namespace in a com atl project in VC6. I don't know how i have to do this. I want to use this dll in C# and it will be nice to have namespace.
Tahnks,
Mihai
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Anyone know if boost provides a way of escaping\unescaping regular expression metacharacters?
In Italy for thirty years under the Borgias they had warfare, terror, murder, bloodshed - but they produced Michelangelo, Leonardo da Vinci and the Renaissance. In Switzerland they had brotherly love, five hundred years of democracy and what did that produce - the cuckoo clock!
-- Harry Lime
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Hi Friends,
I am looking for some very good book explaining SNMPv2 and MIB-II development in C++ (Object oriented approach). Please refer me any such book which i can buy form internet.
YOur help will be highly appreciated.
Best regards
Mukhan
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I would like to do project "Thumb Rcognition and Authentication" using VC++ .
if any one has some idea plz send some suggestion.
Regarding the interface of the Scanner and the database.
And device drivers also
hello every body
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??? talking about fingerprint recognition ?
Maximilien Lincourt
Your Head A Splode - Strong Bad
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Hi all,
i have 2 annoying vc7 problems:
1. i use pragma warning disable for the 4311 and 4312 (sign mismatch)
doesn't seem to work... 
2. i have in my solution 2 active x projects, everytime the solution compile them even if they were compiled a second ago...it for some reason thinks that the files are not up to date
question:
is there a way to disable the output "project xxx is up-to-date" and just tell the compiler to compile only the project that has been changed???
thanks in advanced
Yaron
Ask not what your application can do for you,
Ask what you can do for your application
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#pragma warning must be outside the body of a function...
do you verify this ?
TOXCCT >>> GEII power
[toxcct][VisualCalc]
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even better, it is declared in the stdafx.h above all the includes...
what about my other problem and question?
any1?
thanks
Yaron
Ask not what your application can do for you,
Ask what you can do for your application
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hi
i want to know can we read dbf file with odbc if yes which driver should be used to mak the dsn.
ddd
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Yes, DBF files can be read using ODBC. Look in your machine's list of installed drivers to see which one(s) can handle DBF files. Last time I checked, that was a dBase file format.
"One must learn from the bite of the fire to leave it alone." - Native American Proverb
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thank u it works.
honesty is the best policy.
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I am building a window in code (not via RC or dialog templates) and attaching EDIT controls to it. Upon completion, there may be 10 windows with 25 EDIT controls each.
Within each window (one displayed at a given time) I'd like to TAB between the EDIT controls. Unfortunately, the only examples I can find on the net (http://blogs.msdn.com/oldnewthing/archive/2003/10/21/55384.aspx)
want me to change my message loop to something like this:
if (IsDialogMessage(hwnd, &msg)) {
/* Already handled by dialog manager */
} else {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
My message loop is in a completely different C++ file/class. For this to work as described, I'd need to pass the application (or make it global) to every single EDIT control - or at least, find away to keep updating the "hwnd" used in the IsDialogMessage method above every time focus changed since that method works on a specific EDIT control at a time ...
Is that really necessary? I've built the EDIT controls with WS_TABSTOP style, and naturally, they are eating the TAB key. I can manually catch and GetNextDlgTabItem myself, but I wasn't sure if that was normal.
Is there a cleaner way I've overlooked?
Many thanks,
-Luther
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Once you have built them, you could
SetWindowPos(CWnd* pWndInsertAfter,
int x, int y, int cx, int cy, UINT nFlags );
where
pWndInsertAfter identifies the CWnd object that will
precede this CWnd object in the Z-order.
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I'm not sure how that helps me?
If I am in a TEXT EDIT box - and I press the "TAB" key, the MessageBell goes off and the "TAB" key is sent to the TEXT EDIT box.
If I manually catch the "TAB" key in a WM_CHAR message and manually call GetNextDlgTabItem and then SetFocus(nextItem) ... I get the behavior I want.
The ordering is fine. When I manually tab, I tab to the correct TEXT EDIT box. The problem is not the ordering or where I am going. The problem is catching the "TAB" key before it is sent to the EDIT TEXT box. That is what IsDialogMessage handles for me.
I'm just looking for some common idiom to handle this - since IsDialogMessage needs the HWND to check and IsDialogMessage must exist with the main message loop - 100,000 miles (so to speak) away from the rest of my code.
Does that help clarify anything? Thanks,
-Luther
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Is it a modeless dialog? I'm having the same problem.
In modal dialogs, WS_TABSTOP does the job you want: send focus to the next control in the tab order when tab is hit. Modeless, nope...I get the same behavior. Help anybody?
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Hi,
I am upgrading VC compiler on a windows machine from version 6.0 to 7.1
After upgrading when I tried to compile my application and got this error
\\Vc7\atlmfc\include\atlalloc.h(218) : error C2629: unexpected 'class ATL::CTempBuffer ('
I was able to compile code on 6.0 version
I am getting this error whenever "atlalloc.h" is included directly or indirectly in my cpp file.
Please tell me how to fix this
Regards... Ankur
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some code that was compiling good under VC6 can fail under VC7 because not Standard C++ compliant anymore...
what is the failling code please ?
TOXCCT >>> GEII power
[toxcct][VisualCalc]
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I'm trying to rewrite an assembly program in C++. Instead of reinventing the wheel, I am cutting and pasting a lot of asm into __asm blocks. However, whenever I try to call int 0x21, I get an unhandled exception. Why is this and how do I get around it?
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In this case you need to reinvent (most of) the wheel. The call int 0x21 (MS-DOS call) is probably allocating memory from the Upper Memory Area (UMA), which implies 16-bit code (old code). I am just surprised that that is the only problem you are asking about.
If you need to rewrite this old code, then you need to understand it:
1) You need to know what programing language the assembly code was ment to be accessed from (assuming it is not entirely in assembly).
2) Which version of the compiler was used (if possible).
3) Which processor it was written for (probably intel386).
4) What each of the assembly commands mean (+ what each function call does).
5) etc...
6) Break out or find the old books, on the calling language and the assembly language used.
The fact that you are trying this implies that you have a good idea of what you are attempting to do. If the assembly code (that calls int 0x21) represents a function call and you just copied it into and __asm block, in a C/C++ function, then post the funtion code.
INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen
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The assembly program was a stand alone application; it was not called from anywhere. I wanted to add some functionality to it, but it's been so long since I've programmed in asm that I've forgotten most of it. The compiler that was originally used to compile it was a86. It was written for the 286 intel processor. (16bit only) I'm familiar with most of the code and what it's supposed to do since I had left some comments here and there, but this is the first time I've ever tried to put asm and c++ in the same program.
Here is a block of code that's causing me problems:
;//;open file using handle (r/w)
lea dx, name
mov ax, 3D02h
int 0021h
jc end
xchg ax, bx
basically what it does is load the address of filename in memory into dx. name is a NULL terminated char array defined in the main() function. Then move 3D02 into ax. This will cause int21 to call function 3d which is the open filename command. The 02 byte in AL specifies to open the file in r/w mode. Then int21 is called to open the file. Afterwards the Carry flag is checked to see if the open was a success or failure. This should catch any errors with the open and prevent the program from crashing. (and yes, the label "end" is inside the same __asm block as the above code). Finally ax and bx are exchanged to put the file handle in bx. The next function called in asm code will require the handle be in bx, so might as well put it there now.
I debuged the above code and it crashes when it gets to the call to int21. I'm not sure what to do from here.
Also, I'm running Windows XP with a NTFS filesystem. When I run the asm code after it was compiled with a86, it runs fine. 
thanks!
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I was thinking about a function call such as this (so I could call it):
return_type OpenFile(char* name)
{
__asm {
lea dx, name
mov ax, 3D02h
int 0021h
jc end
xchg ax, bx
...
}
...
}
Anyway, it does not matter.
I would go ahead and reinvent the wheel; actualy you are not reinventing the wheel, you are just bring it up to date. Things like accessing file I/0 should be handle at the current language level (things change). The only reason for keeping any of the code at assembly level is for speed.
Any of the assembly code you wish to keep and wrap in a function call should be wrapped in C function calls, so you do not have to deal with the difficulties (name mangaling) of C++.
Unless you are writting code at the driver level (ring 0), you normaly do not need to write assembly code. Modern day compilers are very good at otimising your code. Plus the fact that writting your code in C/C++ is much easier to understand (and modify).
Understand this: Under Win2000 and above the system will get upset if you try to access memory (read/write) without the proper security clearance, this is intended to defeat crackers/hackers.
__asm can be very useful, in time criticle applications. For good examples of its usage, see the source code for memset() and memcpy().
I know that I just told you to reinvent the wheel, but I realy beleive that is the best way to accomplish your goal (less headacks and, yes, less time in the long run).
INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen
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Interrupts are GENERALLY NOT ALLOWED in Windows!
There is only one exception: Interrupt 2Eh, which is used for communication between user mode and kernel mode.
Every other interrupt should cause an exception because it can only be called from Ring-0!
Don't try it, just do it! 
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Are you really sure you couldn't just recreate this assembly language program's functionality in a straight C++ application? Almost anything you try to do via int 0x21 is an MS-DOS function call, which may or may not be emulated in the Windows environment (depending upon how you're running your application). The unhandled exceptions you are seeing are probably related to access denials.
Software Zen: delete this;
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I'm sure I can recreate the program in strait C++. It just would be easier to reuse my old code if it were possible. If you truely can't use any interupts except 2E in __asm blocks under windows, then I don't see where __asm blocks would be useful for anything. In all the asm programs I've written, the code has consisted of mostly shuffling registers and interupt calls. Without using interupts, how can assembly language be useful for anything?
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CorvetteZ0606 wrote:
Without using interupts, how can assembly language be useful for anything?
Unless you are using DOS-specific interrupts, or those that deal directly with hardware, you can do numerous things. But most assembly code has been "wrapped" by a much friendlier function. Since device drivers operate at ring 0 instead of ring 3, they are loaded with assembly code.
"One must learn from the bite of the fire to leave it alone." - Native American Proverb
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