C / C++ / MFC Discussion Boards

Re: "Default" class member

DQNOK27-Sep-07 4:39

DQNOK

27-Sep-07 4:39

Oops; it's a Scott Meyers book, not a Stroustrup book...

Re: "Default" class member

led mike27-Sep-07 4:18

led mike

27-Sep-07 4:18

Sometimes called a cast operator[^]

You also want to read what Scott Meyers has to say about it in Effective C++[^]

Re: "Default" class member

DQNOK27-Sep-07 4:35

DQNOK

27-Sep-07 4:35

Thanks. I had forgotten about user defined type conversions (C++, Stroustrup, 7.3.2)

I don't have the Effective C++ book on hand, and the link doesn't divulge Scott's secrets. Stroustrup discusses some of the issues. Maybe that's enough...

David

Re: "Default" class member

led mike27-Sep-07 4:43

led mike

27-Sep-07 4:43

IMHO Meyers work is a "must read".

Re: "Default" class member

DQNOK27-Sep-07 4:52

DQNOK

27-Sep-07 4:52

I just now ordered it thru Amazon.

Re: "Default" class member

jhwurmbach27-Sep-07 5:19

jhwurmbach

27-Sep-07 5:19

led mike wrote:
IMHO Meyers work is a "must read".

Definitely!

Though I speak with the tongues of men and of angels, and have not money, I am become as a sounding brass, or a tinkling cymbal.
George Orwell, "Keep the Aspidistra Flying", Opening words

Project help (Port programming)

TooFast27-Sep-07 3:42

TooFast

27-Sep-07 3:42

i have made a infrared reciver for computer as part of my project

currently i am using pre build software for testing nd controling but

i need to build a software to contol its functionality and that to in VC++

my Ir device is connected to computer via DB9 female connector and

all i know is that i have to do port programing for controlling it

but i dont know a single command of port programming and VC++ i know C++

plz provide any site any book and help plz

Re: Project help (Port programming)

Roger Stoltz27-Sep-07 4:23

Roger Stoltz

27-Sep-07 4:23

http://www.flounder.com/serial.htm[^]

"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown

Detaching dialog boxes

William Engberts27-Sep-07 2:54

William Engberts

27-Sep-07 2:54

Hi all,

I wrote an editor type program, that uses a dialog box as its main window. I would like the program to return immediately, but the dialog box to remain active. I have tried to use "Create" and "ShowWindow" in the "InitInstance" which works fine, except that the dialog box is immediately destroyed when the program terminates.
How can I achieve this?

Thanks in advance
William

PS
I have already tried "SetParent (NULL)" to change the parent of the dialog to the desktop, but this did not have any effect at all.

W

Re: Detaching dialog boxes

Nelek27-Sep-07 3:06

Nelek

27-Sep-07 3:06

Try calling another time your own programm in a second instance (with a m_bAlreadyOpened variable to make a sleep or avoid the return) before returning on the first one.

But what happens to you is totally logical. If the programm ends, the windows disappear. If not, any message called from the dialog would end in an error because there is nothing to answer him, or assertions or something like that.

Greetings.

--------
M.D.V.

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?

Help me to understand what I'm saying, and I'll explain it better to you

Wink | ;)

Re: Detaching dialog boxes

KarstenK27-Sep-07 3:09

KarstenK

27-Sep-07 3:09

Consider to write 2 programs or why do you need to habe the dialog if your program terminates?

Greetings from Germany

Re: Detaching dialog boxes

David Crow27-Sep-07 3:12

David Crow

27-Sep-07 3:12

William Engberts wrote:
I wrote an editor type program, that uses a dialog box as its main window. I would like the program to return immediately, but the dialog box to remain active.

This makes no sense, as the program and the dialog box are one in the same. If one goes away, so does the other. Confused | :confused:

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: Detaching dialog boxes

William Engberts27-Sep-07 3:19

William Engberts

27-Sep-07 3:19

True. However, I am looking for something like a normal editor: If I call for example notepad from a command box, I get the editor, but the command box is immediately available again (I immediately get the cursor back), even when the editor is still running. If I use my current program, I can only get my cursor back again in my command box by terminating the program. Therefore I intended to detach the dialog box from the program itself, which woudl enable me to terminate the program and keep the dialog box running. If this is not possible; does anyone have another solution?

Thanks in advance
William

Re: Detaching dialog boxes

David Crow27-Sep-07 3:22

David Crow

27-Sep-07 3:22

You need two executables: one to do the launching (using CreateProcess()), and the other to be launched.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: Detaching dialog boxes

Waldermort27-Sep-07 4:04

Waldermort

27-Sep-07 4:04

As David said, you need to use two exe's. In your example you call notepad.exe from the command box, which is cmd.exe. Internaly cmd.exe calls CreateProcess with the path to notepad.exe.

Another method you could try is not close your main window, but simply hide it.

Waldermort

Different between const char * and const char const*

mohindar_kks27-Sep-07 2:27

mohindar_kks

27-Sep-07 2:27

Hi,

what is different between const char * and const char const *.

Re: Different between const char * and const char const*

David Crow27-Sep-07 2:38

David Crow

27-Sep-07 2:38

I would like to think the best answer to this question lies in actually coding something up and experimenting with the two to see what can and cannot be done. Has this form of research died off?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: Different between const char * and const char const*

Dave Kreskowiak27-Sep-07 7:44

Dave Kreskowiak

27-Sep-07 7:44

DavidCrow wrote:
Has this form of research died off?

Apparently, we're the last generation to know how to do this...

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

Re: Different between const char * and const char const*

baerten27-Sep-07 2:40

baerten

27-Sep-07 2:40

I hope i say it right ...

a char * is a pointer on a char-array where you can change all chars into the string.
a const char* is a pointer on a string which you can't change, because he is declared or really constant ( for example "test" is a constant string in your memory, you can't change it)
and a const char const * is even the pointer constant. That means if the pointer is initializated you can't re-use him

const char const *locked = malloc(sizeof(char)*5);
...
locked = malloc(sizeof(char)*15); --> DOESN'T WORK

I hope i don't have sayed bullshit Smile | :)

Re: Different between const char * and const char const*

ShilpiP27-Sep-07 2:44

ShilpiP

27-Sep-07 2:44

Hi ,
The second way is wrong. we cannot use same type qualifier more than once. A type declaration or definition uses a type qualifier (const, volatile, signed, or unsigned) more than once. This causes a warning with Microsoft extensions (/Ze) and an error under ANSI compatibility (/Za).

Yes U Can ...If U Can ,Dream it , U can do it ...ICAN

Re: Different between const char * and const char const*

jhwurmbach27-Sep-07 3:45

jhwurmbach

27-Sep-07 3:45

mohindar_kks wrote:
what is different between const $char * and const char const *.

If you exchange const char const * with const char * const,
'baerten' ist right.
The order of words here is only important in that one const has to be before and one after the *

Though I speak with the tongues of men and of angels, and have not money, I am become as a sounding brass, or a tinkling cymbal.
George Orwell, "Keep the Aspidistra Flying", Opening words

Re: Different between const char * and const char const*

zakkas248327-Sep-07 18:40

zakkas2483

27-Sep-07 18:40

Hi , I have already given explaination for that please see the post

by Shraddha Gautam 8:27 24 Sep '07

Short decription :

Pointer To constent
const char * and char const * both are same.

Constent Pointer
char * const

Const Pointer to constent
const char * const and char const * const both are same.

Hiren Thakkar

Are important these missing *.dll ??

Nelek27-Sep-07 2:15

Nelek

27-Sep-07 2:15

After a question about the MFC42.dll and one of the answers with the "dependancy walker", I would like to know if my project would have problems in other computers where Visual Studio is not installed.

I have used the dependancy walker and it says that there are 3 problems. The *.dll are:

DWMAPI.dll
MPR.dll
SHLMAPI.dll

I have tested my release version with the computer of a partner without VS in his system and it has been opened without problems and some basic functions worked too. I have just used MFC controls and commands (95% sure about this), so I guess my programm will run good in other computers with basic operating systems. But...

What are the above mentioned DLLs for? (Just curiosity)

Re: Are important these missing *.dll ??

David Crow27-Sep-07 2:46

David Crow

27-Sep-07 2:46

Nelek wrote:
DWMAPI.dll

Microsoft's Desktop Window Manager API.

Nelek wrote:
MPR.dll

Microsoft's Multiple Provider Router.

Nelek wrote:
SHLMAPI.dll

If you meant SHLWAPI.DLL, it is Microsoft's Shell Light-weight Utility Library.

Nelek wrote:
What are the above mentioned DLLs for? (Just curiosity)

Have you tried to right-click them in Explorer and select Properties?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: Are important these missing *.dll ?? [modified]

Nelek27-Sep-07 3:01

Nelek

27-Sep-07 3:01

"Have you tried to right-click them in Explorer and select Properties?"

yes, I tried with the dependancy walker and with the normal windows explorer under c:\windows\system32
but the information they gave told me nothing. Just the name, the version and some numbers more and the F1 help says nothing about them.

Anyways, it doesn't matters, as long as I can know, they have nothing to do with my software, so they are not going to give me any problem. When I need to know about them, I will search all I need to understand their function.

Edit: Something deleted

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