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Hi,
I was just debugging this c file when i encountered this statement
#line 24 "Flex.lex"
the control is transfered to line 25 of the Flex file
Can someone explain it in details also other directive which are frequently used .
Thanx..
lokiz
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Hi
I have an application that is to run as a service. That it should run as soon as it is installed without restarting. But the problem is I have created the application as mfc shared. But in some system it doesnt work due to
The version of msvcrt in the system is outdated.
How can I overcome this. I am not able to replace the msvcrt file as the it is used by the current system.
Is there any other option than a static build ? Will static build cause problems. Should I repeat the whole testing process for static build also ?
Regards
zainu
The Best Relligion is Science.
Once you understand it, you will know God.
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You can try to place the version of the DLL you need in the same directory than your executable. When running it, it should load the one located in its directory before searching for one with the same name from the Path.
The other way is to replace msvcrt.dll by putting the version you want in some directory, setting then a copy command to System32 in the registry key "RunOnce" and reboot the system, but it may be potentially dangerous, it could break other applications who need the version you replace.
HTH,
K.
Fold With Us!
"Military intelligence is a contradiction in terms - Groucho Marx, 1890 - 1977"
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Hi
Thank you very much for your time and answer.
I have tried both of them.
1. It has the problem that the old version is already in memory, so my application will refer to the one in memory instead of loading the new one from the folder.
2. I want to accomplish it without a restart.
Thanks again
regards
shiraz
The Best Relligion is Science.
Once you understand it, you will know God.
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I think static linking with crt libary? But I dont know how to do it 
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Well I got it
Change you project setting , and make MFC statically linked.
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Hi
Thanks vikram,
Yes I did that but the application crashes in NT 4.
Anyway I did a workaround and did some command line processing in the set up.
Regards
Shiraz
The Best Relligion is Science.
Once you understand it, you will know God.
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Yes...It may happen.Coz your application might be having sub components and some of them are using statically linked CRT or otherwise...And dealing with multiple crts at a time going to a very rough task ...
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I want to know how to change bkcolor in child window.
pls answer me.
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Hi~
Window API has a lot of const or macro
e.g S_OK, WM_PAINT, SW_NORMAL, etc.
Where can I find the value?
I cannot find them in MSDN
THanks
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ting668 wrote:
Where can I find the value?
Just hover your mouse above them and you will see the value. 
OR right-click and select go to definition.
<marquee> STUCK STUCK STUCK STUCK
Stuck to Programming through an unbreakable bond 
My Articles | My Blog
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I am creating a COM component in VC++ using MFC and automation. The automation process is via the CCmdTarget class and IDispatch. The component is a wrapper for accessing a proprietary binary file which holds information pertaining to a scanning system we use. Specifically each binary file will hold information relating to a particular form setup, such as how many sheets the form has the fields which we are capturing off the form and so on (the package is called IST). A portion of the object model for the file structure is as follows:
Application (only one)
----Records (contains all the fields)
--------Fields
----Documents
--------Sheets
------------Grids (maybe OMR or OCR region on the form, and will link back to one a field)
etc..
The structure is stored on disk in the above manner, and read into structs. The way I have gone about exposing the structs is via nested objects and collections of objects (CTypedPtrArray). So as an example I have exposed the records as IRecord and IRecords, IRecords is a collection of IRecord objects. The annoying aspect of this is that each IRecord object must hold a pointer to the record structure that has been read off disk. This pointer is setup during construction of the collections after it has been read off disk, and will allow us to write back the information to disk if any changes are made.
This is all working fine (from what I can tell) however there appears to be a memory/access violation issue when the objects go into final release.
So I’m just wondering whether anyone has any advice with relation to automation, and how to appropriately dispose of objects.All the destructors are virtual in the component. Is that causing any problem? Could anyone please clarify that whether the destructors should be made virtual in COM? I am happy to send the project if required.
Thanks in advance.
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you are missing some thing some where
-----------------------------
"I Think It Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk
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You might be using smart pointers and somewhere calling release on some interface pointer. This might be the cause. Check that out
-------------------------
Have a great day ahead!
Regards,
Sohail Kadiwala
(My COM Blog - http://lovecom.blogspot.com)
modified 21-Apr-21 21:01pm.
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Sohail Bhai,
Happy Ramadan.
any knowledge about how to create Evallution dll,Runtime Dll or Developer DLL.
just need a little pointer towards that
-----------------------------
"I Think It Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk
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Is there any Windows Audio Api's which allows for specifying any varying sample rate, other than fixed defaults. (8000, 11025, 22050, 44100)?
Thanks
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Should I do this:
#include <iostream>
using namespace std;
or should I do this:
#include <iostream>
using std::cout;
using std::cin;
using std::endl;
.
.
.
I find that making the namespace std global in implementation
file easier to work with, but some people suggest avoid doing
that. Should I? Do you make namespace std global?
Thanks,
Alex
-----------------------------
C++ without virtual functions is not OO. Programming with classes but without dynamic binding is called "object based", but not "object oriented".
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The second option is neater, and better style. In the real world, it's doubtful that you'll notice the difference. I always do the second, to be a nerd.
Christian
I have several lifelong friends that are New Yorkers but I have always gravitated toward the weirdo's. - Richard Stringer
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I rarely use either. The whole point of namespaces is to be able to separate groups of things to avoid name clashes. The using directive basically gets rid of the namespaces and puts everything in the global namespace, making the use of the namespace pointless, especially the first form. If I do use the using directive, I use the second form. It's a lot cleaner and helps to prevent clutter of the global namespace.
Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"
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Okay, so if I use using namespace std;, does that mean the program will compile everything named under namespace std? Many people recommend not to make the namespace std global, but some say it doesn't matter. But I usually do the second way, typing explicitly using::string, using::cout......until I read the newly released book from Andrei Alexandrescu (highly repected person in the field), the book named C++ coding standard. (ISBN: 0-321-11358-6)
Here is a quote from the book:
But here's the common trap: Many people think that using declarations issued at namespace level (for example, using N::Widge) are safe. They are not. They are at least as dangerous, and in a subtler and more insidious way.
After reading this, I was thinking, am I doing the right way? So I thought I would ask people here how they are doing it.
<br />
#include <iostream><br />
using namespace std;<br />
<br />
int main()<br />
{<br />
return 0;<br />
}<br />
or should I do this:
<br />
#include <iostream><br />
using::cout;<br />
using::cin;<br />
using::endl;<br />
<br />
int main()<br />
{<br />
<br />
return 0;<br />
}<br />
-----------------------------
C++ without virtual functions is not OO. Programming with classes but without dynamic binding is called "object based", but not "object oriented".
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Alex Ngai wrote:
But here's the common trap: Many people think that using declarations issued at namespace level (for example, using N::Widge) are safe. They are not. They are at least as dangerous, and in a subtler and more insidious way.
Which is exactly why I rarely use them either. Promoting any namespace member to the global namespace (which is what the using directive actually does) has the rather dangerous ability to shadow a member already in the global namespace with the same name, much like an overloaded function, but a lot more subtle. These errors can be very difficult to debug.
Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"
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Thanks for your reply.
But many feature in stardard C++ are in namespace std. Even the simple input & output, string are in namespace std.
So, should I stick with using::string style? Is it better or it doesn't matter, like what the author said?
-----------------------------
C++ without virtual functions is not OO. Programming with classes but without dynamic binding is called "object based", but not "object oriented".
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My preference is to use individual using std::string; type statements instead of bringing the whole std namespace in with using std;
But of course there is no reason why you have to use using ...; at all. You can just use the full names at the appropriate points. eg
std::cout << "This is a test" << std::endl;
Instead of
using std::cout;<br />
using std::endl;<br />
<br />
cout << "This is a test" << endl;
Mike
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Mike Beckerleg wrote:
You can just use the full names at the appropriate points.
Indeed, I prefer to use the explicit full names. It is then obvious which function you intend to call.
Ant.
I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)
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