C / C++ / MFC Discussion Boards

Re: Design Question: When use Win32 and when MFC?

CPallini2-Aug-07 3:00

CPallini

2-Aug-07 3:00

mandanani wrote:
MFC has low performance but development time is less

In most cases saving development time is the best option (and software reliability is even more valuable).

Moreover, IMHO, performace differences between MFC and WIN32 API are almost irrelevant for the average software developer (like me: I usually have to look for better designs and algorithms to improve the overall performance).

That said, I think that MFC is a good class library but you need to use it only if fits your needs, in other words, if you don't like the Framework, WIN32 API is an option.
Big Grin | :-D

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Re: Design Question: When use Win32 and when MFC?

Mark Salsbery2-Aug-07 7:49

Mark Salsbery

2-Aug-07 7:49

mandanani wrote:
Using Win32 has high performance...MFC has low performance

What exactly do you think MFC uses?

Which part of MFC have you seen give worse performance than straight Win32 calls?

I'm not agreeing or disagreeing, but when I see this statement I want proof.

Most of the time it's just parroting what some uninformed peer has stated.

I'm calling B.S.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Design Question: When use Win32 and when MFC?

Force Code2-Aug-07 8:22

Force Code

2-Aug-07 8:22

As best I can tell, MFC is nothing but a convoluted "object-oriented" wrapper around the Win32SDK. My opinion is that object-orientation often serves to obfuscate functionality, hinder maintenance, and it certainly cannot improve performance any. If you look at the binary for a windows executable you'll see win32 sdk calls, not MFC. So for personal projects, why add another layer you have to learn which doesn't actually add anything.

It is worth noting that GDI+ is offered in its standard "object-oriented" guise as well as in a flat api. The same is true of the FreeImage Graphics Library. The Cairo graphics library, (which I highly recommend, BTW, along with FreeImage) is strictly a flat api and a model of lucidity. The web browser Mozilla uses Cairo instead of GDI+.

Re: Design Question: When use Win32 and when MFC?

mandanani2-Aug-07 18:11

mandanani

2-Aug-07 18:11

seem like folks had misunderstood me. I prefer to develop a project with MFC until and unless my boss compels. In fact bosses doesn't know basics of any languange. Poke tongue | ;-P

This is just a question came to mind, and thought of getting all your valuable views Smile | :)

But MFC adds extra layer over Win32 and will have less (may be negligible to many Big Grin | :-D

) performance to Win32. With MFC application can be written in fly : Cool | :cool:

Bottom-line those who love ooops prefer to use MFC and those traditional C programmers prefer Win32.

Merge project

Max++2-Aug-07 0:40

Max++

2-Aug-07 0:40

My project is the SDI project using CEditView.
And then I add another view(CFromView)in run-time to this project using CSplitterWnd.
The view can switch and work properly but the menu don't change follow view.

When I focus at CEditView I want to show the main menu and the other hand when I focus at CFromView I want show the another menu that come with the view.

How can I do this.
Please give me some link or article that can support this issue.

Thanks
Max

Re: Merge project

KarstenK2-Aug-07 1:38

KarstenK

2-Aug-07 1:38

Change in the message WM_GETFOCUS or WM_KILLFOCUS your menu items.

Greetings from Germany

Re: Merge project

Max++2-Aug-07 1:47

Max++

2-Aug-07 1:47

Thanks a lot but what the function use for change menu.

Re: Merge project

KarstenK2-Aug-07 1:50

KarstenK

2-Aug-07 1:50

"Read The Fine Manual": about CMenu or look here at CP for samples.

Greetings from Germany

Re: Merge project

Max++2-Aug-07 2:19

Max++

2-Aug-07 2:19

Thanks You

Retrieve a character from a string

Perspx2-Aug-07 0:26

Perspx

2-Aug-07 0:26

I have a string in memory, pointed to by a char pointer (char *). So say if the buffer is declared as:

char *buffer;

then some memory is allocated with:

buffer=(char *)malloc(10);

then some text is placed here:

strcpy(buffer, "some text");

then i want to return a character from buffer (for example, the first character which is 's'), how do I do this?

--PerspX

"Nowadays, security guys break the Mac every single day. Every single day, they come out with a total exploit, your machine can be taken over totally. I dare anybody to do that once a month on the Windows machine." - Bill Gates

Re: Retrieve a character from a string

mandanani2-Aug-07 0:51

mandanani

2-Aug-07 0:51

I think both will return character at i position. i starts from 0

*(buffer+i)
*buffer[i]

Re: Retrieve a character from a string

KarstenK2-Aug-07 1:40

KarstenK

2-Aug-07 1:40

I think

*(buffer+i)
buffer[i] //<=changed Blush | :O

Greetings from Germany

Re: Retrieve a character from a string

CPallini2-Aug-07 0:52

CPallini

2-Aug-07 0:52

Perspx wrote:
char *buffer;

then some memory is allocated with:

buffer=(char *)malloc(10);

then some text is placed here:

strcpy(buffer, "some text");

You're lucky: the string fits exactly inside the buffer (i.e. take care)!

Perspx wrote:
then i want to return a character from buffer (for example, the first character which is 's'), how do I do this?

buffer[0] or *buffer.
Smile | :)

P.S. Remember to free the buffer.

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Re: Retrieve a character from a string

Paresh Chitte2-Aug-07 0:52

Paresh Chitte

2-Aug-07 0:52

buffer[n] will return nth character.

Regards,

Paresh.

Re: Retrieve a character from a string

Sivaprasad S Nair2-Aug-07 1:21

Sivaprasad S Nair

2-Aug-07 1:21

char *buffer;

//then some memory is allocated with:

buffer=(char *)malloc(10);

then some text is placed here:

strcpy(buffer, "some text");

char c;

for(int i(0);i<10;i++)
{
c=*(buffer+i);//return each character from the buffer

cout<

Re: Retrieve a character from a string

toxcct2-Aug-07 2:40

toxcct

2-Aug-07 2:40

Paresh Chitte wrote:
buffer[n] will return nth character.

wrong. it returns the (n+1)th character

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Re: Retrieve a character from a string

Sivaprasad S Nair2-Aug-07 18:39

Sivaprasad S Nair

2-Aug-07 18:39

please explain

Re: Retrieve a character from a string

toxcct2-Aug-07 21:13

toxcct

2-Aug-07 21:13

the 1st character is at index 0, so, the index retrieves the (n-1)th character... is it that hard to understand ?

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

Re: Retrieve a character from a string

Paresh Chitte2-Aug-07 21:19

Paresh Chitte

2-Aug-07 21:19

Thanks.

Regards,

Paresh.

Re: Retrieve a character from a string

Sivaprasad S Nair2-Aug-07 18:48

Sivaprasad S Nair

2-Aug-07 18:48

Try this code
its working
no change in previous code

#include "stdafx.h"
#include <stdio.h>
#include <iostream.h>

#include "stdlib.h"
#include <string.h>

int main(int argc, char* argv[])
{
char* buffer;

//then some memory is allocated with:

buffer=(char *)malloc(10);

//then some text is placed here:

strcpy(buffer, "some text");

char c;

for(int i(0);i<10;i++)
{
c=*(buffer+i);//return each character from the buffer

cout<

Re: Retrieve a character from a string

Perspx3-Aug-07 2:36

Perspx

3-Aug-07 2:36

Thank you all for your helpful answers Smile | :)

--PerspX

Dialog box query

dona jain1-Aug-07 23:46

dona jain

1-Aug-07 23:46

i have used a text box in my dialog box in WIN32 programming....now i want that the data entered by user can be copied to a text file on pressing ok. what method can i use for this??

Re: Dialog box query

KarstenK1-Aug-07 23:51

KarstenK

1-Aug-07 23:51

with GetWindowText(...) you can fetch the text and then write it to a file. Sleepy | :zzz:

Greetings from Germany

Re: Dialog box query

Naveen1-Aug-07 23:51

Naveen

1-Aug-07 23:51

GetDlgItemText()?

nave

[OpenedFileFinder]

Re: Dialog box query

CPallini2-Aug-07 0:00

CPallini

2-Aug-07 0:00

To complete your task, have a look also at
CreateFile, WriteFile, CloseHandle WIN32 functions.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

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