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Re: sprintf like function in memory funtions

Programm3r3-Aug-08 23:35

Programm3r

3-Aug-08 23:35

Just a thought...

Is it possible to run a SQL file. If so how can one be able to do so?

Many thanks again...
Regards,

The only programmers that are better that C programmers are those who code in 1's and 0's Green Alien | [Alien]

Programm3r
My Blog: ^_^

Virtual List for CTreeCtrl?

bosfan3-Aug-08 21:52

bosfan

3-Aug-08 21:52

Hello,
is it possible to make a CTreeCtrl with virtual list because i have a many data to list in them?
And now is my problem that the standard CTreeCtrl takes a to long time to list all items??
Does any one have an sample for me??

Thanks for any help and informations!
termal

Re: Virtual List for CTreeCtrl?

Naveen3-Aug-08 22:16

Naveen

3-Aug-08 22:16

AFAIK, there is no such option. A method by which you can improve your insertion speed is using the SetRedarw() function.

m_TreeCtrl.SetRedraw( FALSE );

// insert all item to the tree control

m_TreeCtrl.SetRedraw( TRUE );

nave

[OpenedFileFinder]

Re: Virtual List for CTreeCtrl?

bosfan3-Aug-08 22:21

bosfan

3-Aug-08 22:21

Hello,
thanks for info, i try it now!!

regards
termal

Please help !!!

C++myLife3-Aug-08 20:59

C++myLife

3-Aug-08 20:59

Hi All,
I am creating an application in which I created a front page in Dialog based application. There in the front page I placed some buttons of different applications.
When I chick any button which is inside the front page the partitcular application starts running.
I set that application window on top using SetWindowPos() function.
now the problem is While running any application from the front page, the front page doesnt get disabled. I can close, minimize or maximize the front page.

That is what I dont want. I want that whenever any application runs from my front page the front page get COMPLETELY disabled.

please help....

Thanks.

Re: Please help !!!

ThatsAlok3-Aug-08 21:28

ThatsAlok

3-Aug-08 21:28

use api EnableWindow(FALSE)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You/xml>

Re: Please help !!!

Varghese Paul M3-Aug-08 21:52

Varghese Paul M

3-Aug-08 21:52

You can use WaitForSingleObject API to wait the new process to terminate. You can use the process handle from the PROCESS_INFORMATION structure populated by the CreateProcess API.

Re: Please help !!! [modified]

C++myLife4-Aug-08 18:51

C++myLife

4-Aug-08 18:51

Thanks It worked. Smile | :)

But as soon as I close this new process which I am creating from "CreateProcess()" my main page is also gets closed.

It terminates both the processes.
How to avoid this, any ideas?

modified on Tuesday, August 5, 2008 3:27 AM

Re: Please help !!!

Varghese Paul M5-Aug-08 6:16

Varghese Paul M

5-Aug-08 6:16

Could you please provide the code block ?

String table with Russian strings?

ritz12343-Aug-08 20:25

ritz1234

3-Aug-08 20:25

Hello dear friends,

I am creating multi-lingual IE toolbar in VC 6.0?
I've done with french,Italian,Dutch,German etc.
When I add any Russian string as label they are converted in string with sequence of '?' characters.I think its a Unicode related problem bu I am not clear with the way of solving the problem.Will you guys help me out? Rose | [Rose]

Thanks in Advance to all of you.

ritz1234

back ground color of Message Box

ani_ikram3-Aug-08 20:25

ani_ikram

3-Aug-08 20:25

i want to change background color of Message box
is that possible
if possible then how

MessageBox("alert Message");

it shows message box but will gray (default) background i want to change background

Re: back ground color of Message Box

Varghese Paul M3-Aug-08 20:48

Varghese Paul M

3-Aug-08 20:48

Hi Ani,
Since MessageBox is a Win32 API, I do not think you can change its background color. If you change it, it will affect that particular window class and will be reflected in all the programs running in that machine. You would have to create your own implementation of MessageBox by using a dialog template where you can change the background color of the dialog you used.

Re: back ground color of Message Box

ThatsAlok3-Aug-08 21:30

ThatsAlok

3-Aug-08 21:30

see this canned search is any of help of you :-
http://www.codeproject.com/info/search.aspx?artkw=messagebox&sbo=kw[^]

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You/xml>

Re: back ground color of Message Box

Y_Kaushik3-Aug-08 21:39

Y_Kaushik

3-Aug-08 21:39

Hi Alok,
Do you know Amitabh Kant

Regard's
Kaushik

Re: back ground color of Message Box

ThatsAlok3-Aug-08 22:34

ThatsAlok

3-Aug-08 22:34

off course!

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You/xml>

Re: back ground color of Message Box

ThatsAlok3-Aug-08 22:34

ThatsAlok

3-Aug-08 22:34

any connection [ Smile | :)

]

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You/xml>

Re: back ground color of Message Box

Y_Kaushik3-Aug-08 23:24

Y_Kaushik

3-Aug-08 23:24

He is my Boss.
And he is really Good Man, I respect to him from my bottom of heart.

Sir i have knowledge of MFC almost fine i want to improve it. Can you please help me. As amitabh sir say you have great knowledge of VC++

Regard's
Kaushik

Re: back ground color of Message Box

ThatsAlok3-Aug-08 23:35

ThatsAlok

3-Aug-08 23:35

Y_Kaushik wrote:
He is my Boss.

he is modest as usual, buddy he is one greatest guru i ever met. i can't say i have great knowledge of vc++, but i have some knowledge of it... tell me how could i useful to you!

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You/xml>

Re: back ground color of Message Box

bolivar1234-Aug-08 4:49

bolivar123

4-Aug-08 4:49

Actually, there is a way to change the color of a messagebox. The key to it involves using the AfxHookWindowCreate function and a helper class. Take a look at this article [^] by Nicolas Bonamy.

Using the CMsgBoxDlg helper class in Nicolas's sample application, you could catch the WM_CTLCOLOR message and return a different colored brush. His article is not necessarily about changing the background color of a message box, but you can use the technique of AfxHookWindowCreate and a helper class for message box dialogs.

If you're interested, I could cook up a sample application and maybe write an article. The only thing is that there are a lot of articles already on CP about message boxes.

Inlining Question

Leslie Sanford3-Aug-08 19:36

Leslie Sanford

3-Aug-08 19:36

I want to define a set of constants without using macros. I'd like to determine whether these constants are floats or doubles at compile time. So I'm using templates. In my header file, I have this:

template<bool DoublePrecision>
struct Constants
{
    typedef double SampleType;
 
    static const double pi;
    static const double piDoubled;
    static const double SampleRateDefault;
    static const double DenormalOffset;
};
 
template<>
struct Constants<false>
{
    typedef float SampleType;
 
    static const float pi;
    static const float piDoubled;
    static const float SampleRateDefault;
    static const float DenormalOffset;
};

In my implementation file, I have this:

#include "Constants.h"

const double Constants<true>::pi = 3.14159265358979;
const double Constants<true>::piDoubled = Constants<true>::pi * 2.0;
const double Constants<true>::SampleRateDefault = 44100.0;
const double Constants<true>::DenormalOffset = 1.0E-25;

const float Constants<false>::pi = 3.141593f;
const float Constants<false>::piDoubled = 6.283185f;
const float Constants<false>::SampleRateDefault = 44100.0f;
const float Constants<false>::DenormalOffset = 1.0E-25f;

All of this compiles fine.

My question is whether the values definined here will ultimately be inlined by the compiler where they are used. They are definined in one compilation unit but will be used in other compilation units. Will this prevent them from being inlined? In other words, will this ultimately be less efficient than using macros?

Re: Inlining Question

vikas amin4-Aug-08 7:46

vikas amin

4-Aug-08 7:46

From design point of view Templates are better then macros ,

Vikas Amin
UNITED STATES STEEL CORPORATION

My First Article on CP" Virtual Serial Port "[^]

modified on Thursday, July 24, 2008 5:33 PM

Re: Inlining Question

not_in_use5-Aug-08 11:58

not_in_use

5-Aug-08 11:58

As far as I understand it they won't be inlined, just like regular constants. I have pretty much the same problem right now, except that I don't need to switch types. In this thread I posted my current idea for a workaround (using operator overloading and inline functions), maybe that could help you. It's a hack, but in theory it should work.

As for your templating idea, if you don't need both float and double versions at the same time, you could just use typedefs like so:

// .h file
typedef double myFpType; // Changing this to float changes the type of all constants

const myFpType pi;
...

// .cpp file
const myFpType pi = myFpType( 3.14159265358979 );
...

or using my workaround idea from the link above:

typedef double myFpType;

// In .h file
INLINE_CONST( myFpType, pi, myFpType( 3.14159265358979 ) );

But maybe someone knows a better solution that could help us both out.

Hope that helps,
Peter

Error: Message too long

vikramaditya2343-Aug-08 19:32

vikramaditya234

3-Aug-08 19:32

Hi i am trying to build my code and in the process of building it, I get the error "Message too long" and the build stops.
However, if I clean the build and then re-build the code this problem does not occur. I had been able to pinpoint the files, which if removed the error will not appear.
I am using the VS 2005 compiler.

I am wondering why this error appears. Please advice.

think because thats what matters

Re: Error: Message too long

David Crow4-Aug-08 3:11

David Crow

4-Aug-08 3:11

vikramaditya234 wrote:
However, if I clean the build and then re-build the code this problem does not occur.

So what's the problem then? Does the compiler error reappear?

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Strange problem about IOCP

zengkun1003-Aug-08 16:43

zengkun100

3-Aug-08 16:43

The same file is opened in 3 threads with FILE_FLAG_OVERLAPPED, then these 3 file handles associated to the same i/o completion port respectively.
In each thread, ReadFile was called in overlapped mode(the lpOverlapped parameter is not NULL).
It is strange that in WinXP, these ReadFile always return TRUE, means they complete synchronously, but in Vista, these ReadFile always return FALSE,and GetLastError returns ERROR_IO_PENDING.
Can I get these ReadFile asynchronously in XP?
Thanks Big Grin | :-D

A Chinese VC++ programmer

Last Visit: 31-Dec-99 18:00 Last Update: 13-Jun-24 18:39

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