C / C++ / MFC Discussion Boards

Re: helpstring, ODL and ClassWizard

14-Mar-02 23:41

A good whack might do it. (Delete the .clw file)

Can't create class with Capital C

tbbooher15-Feb-02 18:45

tbbooher

15-Feb-02 18:45

Hello -- i have a very wierd problem Confused | :confused:

. i can't create a class starting with a capital C. when i:

Insert-->New Class

Enter the name that starts with a capital C -- the first C doesn't show up in the file name -- but lowercase 'c' works fine. This is as wierd as it gets . . . Cry | :((

anybody got a clue on this one

also what is all this crap when i have the wizzards create a class:

#if !defined(AFX_USTOMER_H__E35819DB_8CEA_4883_A2DA_E78053B05B81__INCLUDED_)
#define AFX_USTOMER_H__E35819DB_8CEA_4883_A2DA_E78053B05B81__INCLUDED_

thanks,

tim

---------------------------------------
Tim Booher

Re: Can't create class with Capital C

Atul Dharne15-Feb-02 19:05

Atul Dharne

15-Feb-02 19:05

It is not crap Smile | :)

. They are called include file guard headers and they are used so that that particular file does not get included twice. The string AFX_USTOMER_H__E35819DB_8CEA_4883_A2DA_E78053B05B81__INCLUDED_ is generated randomly. For eg.

//customer.h
#ifndef _CUSTOMER_H_
#define _CUSTOMER_H_
//In the first pass of the preprocessor the symbol _CUSTOMER_H_ gets defined
//so if you have included this header again in some other file the
//preprocessor does not go into the if block again as _CUSTOMER_H_ is defined
.
.
.
.
#endif

Atul

Sonork 100.13714 netdiva

Re: Can't create class with Capital C

moliate15-Feb-02 19:50

moliate

15-Feb-02 19:50

It it Hungarian notation to have all classes begin with a capital 'C'. VC interpret 'Custumer' as 'ustumer'. You could use 'CCustomer' or define your class whitout using the class-wizard.

/moliate

Re: Can't create class with Capital C

alex.barylski15-Feb-02 22:28

alex.barylski

15-Feb-02 22:28

I don't know if it's Hungarian Notation, but i'm pretty sure that style was dropped with C++.

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Re: Can't create class with Capital C

Tim Smith16-Feb-02 2:21

Tim Smith

16-Feb-02 2:21

Starting class names with C was dropped? Heh, not by a LONGSHOT. Sure, the standard doesn't use that convention, but MS and others having been using long before STL was a glimmer in people's eyes.

And yes, dropping the capitial C from the start of the file name is a ... feature. Annoying if that isn't want you want. However, when creating a new class, you can specify the file names.

Tim Smith
Descartes Systems Sciences, Inc.

Re: Can't create class with Capital C

alex.barylski16-Feb-02 11:17

alex.barylski

16-Feb-02 11:17

I never said starting classes with a C was dropped...read again!

I said It wasn't part of hungarian notation...

you know lpsz - long pointer to zero termintaed string

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Re: Can't create class with Capital C

Michael Dunn16-Feb-02 9:35

Michael Dunn

16-Feb-02 9:35

Just TAB into the filename edit boxes and change the filenames there.

--Mike--
"There are only a limited number of jobs where they will ask to see the sausage. Most of them are in movies."
-- Christian Graus, 2/11/2002
My really out-of-date homepage
Sonork - 100.10414 AcidHelm
Big fan of Alyson Hannigan.

Points to pixels?

15-Feb-02 18:37

What is the best way to convert

1. points to pixels?

2. cm to pixels?

Re: Points to pixels?

Shog⁹15-Feb-02 19:50

Shog⁹

15-Feb-02 19:50

explanation in MFC, and from memory. take with large pinch of salt
Given a CDC* pDC, an integer specifying points pt, and another integer specifying centimeters cm:

points to pixels
- 1pt = 1/72in
- 1in = 2.54cm
- 1cm = 1000 HIMETRIC units (HIMETRIC = .01mm)
- convert HIMETRIC to pixels using pDC->HIMETRICtoDP()
- so, the conversion would go like this:
```
int px = pt*2540/72;
CSize size(px,px);
pDC->HIMETRICtoDP(&size);
```

cm to pixels (explained above already)

int px = cm*1000;
CSize size(px,px);
pDC->HIMETRICtoDP(&size);

*** note: see documentation for HIMETRICtoDP: in MM_TEXT mapping mode, the measurements gained from this only reflect physical measurements when the ratio of logical coordinates to physical coordinates is 1/1. Not sure when this would matter though.

farewell goodnight last one out turn out the lights

Smashing Pumpkins, Tales of a Scorched Earth

Where is the Battleaxe Document Explorer?

Paul Selormey15-Feb-02 18:34

Paul Selormey

15-Feb-02 18:34

Battleaxe Document Explorer was posted sometime ago, but my bookmark fails.

Best regards,
Paul.

Paul Selormey, Bsc (Elect Eng), MSc (Mobile Communication) is currently Windows open source developer in Japan.

How can I add my own right click menu to a CWebBrowser2

Julia Larson15-Feb-02 17:29

Julia Larson

15-Feb-02 17:29

I've been trying to do this for days. Dead | X|

Anyone have a clue for me? Confused | :confused:

Thank you
-Julie Rose | [Rose]

Re: How can I add my own right click menu to a CWebBrowser2

alex.barylski15-Feb-02 22:38

alex.barylski

15-Feb-02 22:38

I could tell you. But i enjoy watching others squirm. Big Grin | :-D

Just kidding...

I think your referring to IWebBrowser2, C is for classes I is for Interfaces...slight difference. Big Grin | :-D

Anywho...

You have to implement IDocHostUIHandler::ShowContextMenu

By returning S_OK you prevent IE (webbrowser control) from displaying it's default menu. returning S_FALSE allows default behavior.

Basically I think you'd just do your stuff (create menu) and return S_OK

Cheers

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Can I declare a static member in a base class?

nay15-Feb-02 17:04

nay

15-Feb-02 17:04

Ok. I'm writing a 2 pass assembler (for a class). Here's an annotated version of the base class...

class Asm
{
public:
    Asm();
    ~Asm();
protected:
    static HashTable symbolTable;
};

When I derive a class from Asm I get a linking error telling me that HashTable is unresolve. If I remove the static keyword it links fine.
1. So I'm guessing I can't have a static member in a base class because theres a possibility that the bass class will never be created. Is that right?
2. If this is the case then how do I share the symbol table between my derived classes, Pass1 and Pass2?

nay

Re: Can I declare a static member in a base class?

Atul Dharne15-Feb-02 17:36

Atul Dharne

15-Feb-02 17:36

nay wrote:
static HashTable symbolTable;

You have to initialize the HashTable just after your class definition by invoking its constructor maybe like

HashTable Asm::symbolTable();

This will be shared by all the instances of your Asm object.

Atul

Sonork 100.13714 netdiva

Re: Can I declare a static member in a base class?

nay15-Feb-02 17:52

nay

15-Feb-02 17:52

AAAHHHH... thank you very much. I initialized it in my cpp file like this...

HashTable Asm::symbolTable     //compiler didn't like the ()

thanks!

nay

Saving MFC Source :: C++

valikac15-Feb-02 15:10

valikac

15-Feb-02 15:10

Hi.

I started an MFC sample program that Prosise include in his book. I would like to save the source code, but not the enter project. Note that I started the project using AppWizard.

What files do I have to save from the project so I can always open that project up again? Do I have to save the entire probject including Debug? I have not save and/or remove any files yet because I do not work to lose any resource files.

Thanks,
Kuphryn

Re: Saving MFC Source :: C++

Nish Nishant15-Feb-02 15:36

Nish Nishant

15-Feb-02 15:36

Delete the [debug] and [release] folders and back up the rest of the files into a zip.

Nish

Nish was here, now Nish has gone;
He left his soul, to turn you on;
Those who knew Nish, knew him well;
Those who didn't, can go to hell.

I like to Jig | [Dance]

on the Code Project

Sonork ID 100.9786 voidmain
www.busterboy.org

Re: Saving MFC Source :: C++

valikac15-Feb-02 15:54

valikac

15-Feb-02 15:54

Okay. Thanks.

Kuphryn

Re: Saving MFC Source :: C++

Rick York15-Feb-02 16:04

Rick York

15-Feb-02 16:04

You do not the .ncb, .opt, .plg, .aps, or .clw either. All of these are re-generatable.

I wish some of the article writers here were aware of this. Wink | ;)

Converting Visual C++ 4.2 to VC++6.0

LouThePu15-Feb-02 11:29

LouThePu

15-Feb-02 11:29

The boolean variable in 4.2 is an integer(4 bytes)while
on 6.0 it is a character. If I have files stored on VC++ 4.2 and I want to retreive them with a version compiled on 6.0 Wouldn't I have a problem? Did microd=soft take care of this problem somehow?

Louis Norman

Re: Converting Visual C++ 4.2 to VC++6.0

Alvaro Mendez15-Feb-02 12:31

Alvaro Mendez

15-Feb-02 12:31

LouThePu wrote:
If I have files stored on VC++ 4.2 and I want to retreive them with a version compiled on 6.0 Wouldn't I have a problem?

Yep, you should defintely experience problems. A quick-n-dirty workaround is to define bool to int in your stdafx.h.

#define bool int

Regards,
Alvaro

Behind a beautiful woman there's usually a guy who just couldn't wait to get rid of her.

DLL Function in VB

Tim Rymer15-Feb-02 10:18

Tim Rymer

15-Feb-02 10:18

Hey, I've created an ATL object in a .dll, and i am trying to call the function dynamically. How do i need to setup my functions to get them to not give back crappy values (my BSTR="?????????????????????????????")

i tried __stdcall or _export but nothing is working. i also have "ByVal" for the parameter in my function definition in the VB section.

~Timothy T. Rymer

www.digipen.edu
tim.xpertz.com

Re: DLL Function in VB

Paul M Watt15-Feb-02 14:15

Paul M Watt

15-Feb-02 14:15

Is the ATL object a COM object, if so then you simply need to declare your class inside of the type library that is created in your idl file of your project.

Then you can go to the Project | references menu item in your VB project in order to reference your COM object. From there you can use that object in VB just like any other object.

If you are actually exporting an object like you say rather than a function, you would need to instantiate an instance of this object before it can be used, and I do not know of a way to use a C++ object in VB except through COM. If this is what is happening, I am surprised that your program is not crashing.

Don't get WM_COPY in my class?

15-Feb-02 9:33

Hi,
I have a CListBox derived class. I created a context menu which sends a WM_COPY message. I handle this message and copy stuff to clipboard, works fine.

How can I add a CTRL+C key functionality to my class? Pointing me to the right direction would be fine! Well, do I need to create this WM_COPY message by myself (via PreTranslateMessage()) or do I request it somehow?

Thx, Moak

PS: Btw, what is the difference between using ON_MESSAGE() macro or ON_COMMAND() in the MESSAGE_MAP?

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.