C / C++ / MFC

Re: Dealing with Large Amounts of Data in Files [ot]

13-Oct-05 14:21

Well, if you dont want to read the whole file, you dont need to load the whole file.

That is, when first loading the file, load text from the file that fills only one page of your textbox, when the user moves the scroll bars of the textbox, you should determine where to go in the text file, load text that lie in that position and display it to the user.

The user does not care whether the whole text file is loaded or not, but when loading the text from the file only-as-needed, you can gain a very good performance instead of loading the whole text file.

You can load a 2GB text file in milliseconds with little memory usage, little cpu processing, and (almost) no disk load.

Regards,
Mohammad Gdeisat

أعلنت إستسلام قلبي لرحيلك..دعه يودع خطوات سيرك..فقط إجعل قلبك يحتضن حروفي ويشعرها بدفئه

فقد مللت كل لحظا تي بدونك....فمابقي لي إلا أن أثني على قسوتك....

فليتك تعلم كم أنهكتني...وكم أحرقتني...وكم جعلت مني وطنا بلا معالم.
فـــدعنــي أبـــكي على شواطئ دفئك...قاتلي

ThatsAlok13-Oct-05 19:17

ThatsAlok

13-Oct-05 19:17

Mohammad A Gdeisat wrote:

أعلنت إستسلام قلبي لرحيلك..دعه يودع خطوات سيرك..فقط إجعل قلبك يحتضن حروفي ويشعرها بدفئه

فقد مللت كل لحظا تي بدونك....فمابقي لي إلا أن أثني على قسوتك....

فليتك تعلم كم أنهكتني...وكم أحرقتني...وكم جعلت مني وطنا بلا معالم.
فـــدعنــي أبـــكي على شواطئ دفئك...قاتلي

Could you please translate that in english...

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: Dealing with Large Amounts of Data in Files [ot]

Mohammad A Gdeisat14-Oct-05 6:08

Re: Dealing with Large Amounts of Data in Files [ot]

14-Oct-05 6:08

I am sorry, my signature is in arabic, and it has nothing with the answer, I hope that my answer to the post was submitted correctly, here what I wrote:

Well, if you dont want to read the whole file, you dont need to load the whole file.

That is, when first loading the file, load text from the file that fills only one page of your textbox, when the user moves the scroll bars of the textbox, you should determine where to go in the text file, load text that lie in that position and display it to the user.

The user does not care whether the whole text file is loaded or not, but when loading the text from the file only-as-needed, you can gain a very good performance instead of loading the whole text file.

You can load a 2GB text file in milliseconds with little memory usage, little cpu processing, and (almost) no disk load.

Regards,
Mohammad Gdeisat

ThatsAlok14-Oct-05 19:55

ThatsAlok

14-Oct-05 19:55

Mohammad A Gdeisat wrote:
my signature is in arabic, and it has nothing with the answer

ohh you taking me wrong.. I just want to know what exactly your signature meant.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: Dealing with Large Amounts of Data in Files [ot]

Mohammad A Gdeisat14-Oct-05 21:53

Re: Dealing with Large Amounts of Data in Files [ot]

14-Oct-05 21:53

This is the translation of the signature:

"My heart has surrendered for your leaving... let it say goodbye for your steps... just let your heart take my words and feel its warmness... because I've bored all my moments without you... there is nothing left except to praise your cruelty.

I wish you know, how much you've to exhausted and burnt me, and how much you made me a building without a basis... so let me cry on the shores of your warmness...my killer"

Its some kind of romantic sayings in arabic, to express feelings of a loving person... maybe my translation did not give the whole meaning, but it gives the idea.

Even programmers can fall in love!

And ever has it been that love knows not its own depth until the hour of separation

ThatsAlok14-Oct-05 23:54

ThatsAlok

14-Oct-05 23:54

thats nice Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: Dealing with Large Amounts of Data in Files

S Douglas14-Oct-05 1:00

S Douglas

14-Oct-05 1:00

Jenleonard wrote:
Another suggestion was to convert the text file to a database. Someone thought that Access might not be able to handle a record with 1000 pieces of data.

As memory serves Access is good till about a gig in physical size. I have a few hundred thousand entries in an access database, and it runs without a problem. It all depends on the design. Using access to start out with gives you a good reference point to scale it to a SQL server.

DEBUGGING : Removing the needles from the haystack.

Bitmap over video problem (VMR9) again...

Storm-blade13-Oct-05 12:42

Storm-blade

13-Oct-05 12:42

I'm trying to show a bitmap image (blended) over a background video using VMR9, this works fine...

Except...

If the video resolution is lower than the destination window resolution, the overlayed bitmap is also rendered at that reduced resolution... Mad | :mad:

It seems the 'composition rectangle' resolution is restricted to the incoming video resolution, and the bitmap is getting scaled down...

Is it possible to fix the resolution of the composition rectangle to be 1-1 with the window?

(in case the problem isn't clear, the nice 800x600 bitmap is getting scaled down to 200x150 (the video resolution), overlayed, then scaled back up to 800x600 (the output window resolution)). D'Oh! | :doh:

I know it is possible for the composition window to be a higher resolution than the video as if you have multiple video inputs, the bigger one seems to set the resolution, but I can't see how to set it manually... Mad | :mad:

Thanks...
Simon.

Release Build Error

itkid13-Oct-05 11:06

itkid

13-Oct-05 11:06

Hi ,
I have developed one dll and it is working fine in debug build however it is giving me following below error in ReleaseUMinSize build. Can you help me to resolved this issue.

Linking...
Creating library ReleaseUMinSize/PLUManager.lib and object ReleaseUMinSize/PLUManager.exp
LIBC.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
ReleaseUMinSize/PLUManager.dll : fatal error LNK1120: 1 unresolved externals

Thank

Re: Release Build Error

Anonymous13-Oct-05 11:42

Anonymous

13-Oct-05 11:42

You have 2 choices. You can either undefine ATL_MIN_CRT(which will make your dll about 30kb larger), or find the CRT functions being used and replace them with Win32 equivalents.

Re: Release Build Error

kakan13-Oct-05 19:23

kakan

13-Oct-05 19:23

The problem seems familiar to me... Smile | :)

Compare your project settings for debug and release. I'm convinced that you will find differences.

any good assembly language links?

valerie9913-Oct-05 10:53

valerie99

13-Oct-05 10:53

hi, all

I am trying to understand why the app crashes, lots of time it bring up the Disassembly and it's totally just out of my lead....could anybody share some good assembly language links, I just need to understand the basic assembly commends...thank you for your time

Re: any good assembly language links?

ThatsAlok13-Oct-05 19:13

ThatsAlok

13-Oct-05 19:13

valerie99 wrote:
could anybody share some good assembly language links, I just need to understand the basic assembly commend

Hope this Work :-
http://win32assembly.online.fr[^]

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

two projects in 1 solution

LeeeNN13-Oct-05 10:28

LeeeNN

13-Oct-05 10:28

in VC.net, I have a windows application( say project A) "call" another application ( say project B) using CreateProcess(....) approach to run a exe file generated in project B. A is startup project. It's OK to set breakpoint in the files of project A. but it's not OK to set breakpoint in file of project B. I know is project B generate DLL, then it's fine to set breakpoint in file of Project B. Is there anyone have this experience? Confused | :confused:

Re: two projects in 1 solution

FlamTaps13-Oct-05 14:16

FlamTaps

13-Oct-05 14:16

The VS Debugger must "attach" to a process to debug it (hit breakpoints, etc.). Since Project B is launched via CreateProcess() and NOT from the debugger, so the debugger has no association be Project B and the executeable created with CreateProcess().

What you need to do is set a breakpoint right after CreateProcess(). Then, in another instance of VS, open the solution file, and goto "Debug"->"Processes". Select the recently launched executable and click "Attach".

VC++ 6.0 GUI application with TCL 8.4

dipuks13-Oct-05 7:41

dipuks

13-Oct-05 7:41

HI Friends

Iam making a VC++ dialog based application with a Edit box and Run
Button. In the dialog class called TestDlg.cpp, there is a function
called OnMessage(), it is implemented as,

void OnMessage()
{
MessageBox("Hello World");

}

Now iam gonna type in the Edit box,

set a [OnMessage] and click Run Button in GUI

Now the TCL interpreter should be able to find the command OnMessage
and call back the void OnMessage function in TestDlg.cpp in GUI. And popup
the message box.

Is it possible to do something like this? Can anyone please tell me how
to do this?

Thanks in Advance

Don

Re: VC++ 6.0 GUI application with TCL 8.4

Mohammad A Gdeisat13-Oct-05 14:35

DLL Won't load in different location

13-Oct-05 14:35

I am not sure, but i think its possible using MACROS, search the internet for advanced macros and I think its really possible

Regards,
Mohammad Gdeisat

أعلنت إستسلام قلبي لرحيلك..دعه يودع خطوات سيرك..فقط إجعل قلبك يحتضن حروفي ويشعرها بدفئه..دعني أرسم ألوان طيف حلمي وحلمك..دعني أُقبل جبين قلبك..وأهديك عالمي بأسره
فقد مللت كل لحظا تي بدونك....فمابقي لي إلا أن أثني على قسوتك....

فليتك تعلم كم أنهكتني...وكم أحرقتني...وكم جعلت مني وطنا بلا معالم.
فـــدعنــي أبـــكي على شواطئ دفئك...قاتلي

pgarciajumela13-Oct-05 7:13

13-Oct-05 7:13

I hope someone can help me with this one.

I created a DLL to be used by one of my programs. Here is the code I use to load the DLL:

	HINSTANCE hDLL;<br />
        int iReturnVal;<br />
	MYDLL dll;<br />
<br />
	hDLL = LoadLibrary("MYDLL.DLL");<br />
<br />
	if (hDLL != NULL)<br />
	{<br />
           // Do stuff<br />
	}<br />
	else<br />
	{<br />
		iReturnVal = MessageBox("Missing DLL: MYDLL.DLL","ERROR",MB_OK);<br />
	}<br />

When I run my program in the development workstation (where Visual Studio is loaded), it executes without a problem.

I moved the executable and the dll to a different testing PC (along with msvcr70.dll and mfc70.dll, needed becuase that PC didn't have them).

I put the executable and the three dll's (the MS ones and my own) in the same directory. I can start my application but when I try to use the section that executes the code above, I get the "Missing DLL: MYDLL.DLL" message. Confused | :confused:

Any ideas?

Am I missing something?

C^hris L^osinger13-Oct-05 7:19

C^hris L^osinger

13-Oct-05 7:19

if the DLL isn't in one of the folders in your PATH (environment variable), the OS can't load it.

try putting the DLL in your main Windows (WINNT, Windows, whatver) folder.

Cleek | Image Toolkits | Thumbnail maker

pgarciajumela13-Oct-05 7:22

13-Oct-05 7:22

Thanks Chris,

But the DLL is not in one of the folders of my path in the development PC. How can it work there just by putting it in the same directory as the executable but not work in the other PC?

Confused | :confused:

pgarciajumela13-Oct-05 7:31

13-Oct-05 7:31

Tried that....

No luck

C^hris L^osinger13-Oct-05 7:40

C^hris L^osinger

13-Oct-05 7:40

then there's a good chance your DLL depends on some other DLL that it can't load - causing your own DLL to fail to load.

try DependencyWalker[^] to see which DLLs your DLL is looking for.

Cleek | Image Toolkits | Thumbnail maker

pgarciajumela13-Oct-05 8:45

13-Oct-05 8:45

Thanks,

I found the missing DLL