C / C++ / MFC Discussion Boards

Antony M Kancidrowski25-Jan-05 0:51

25-Jan-05 0:51

Michael P Butler wrote:
it was expensive and didn't live up to expectations

You can say that again!

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)

an array of dynamically allocated objects

student_ben24-Jan-05 4:54

student_ben

24-Jan-05 4:54

whats wrong with the following code?

Curve curveObjects[10];
Curve *pcurveObjects;
pcurveObjects = &curveObjects[0];

I get the error messages:
....conflicting types for `int pcurveObjects'
....previous declaration as `Curve*pcurveObjects'

i can't see where i've defined anything as an int, can anyone explain why this is the case?

Re: an array of dynamically allocated objects

David Crow24-Jan-05 5:19

David Crow

24-Jan-05 5:19

Your code is syntactically correct. What does the declaration of Curve look like?

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

API to wireless device configuration

MoZ24-Jan-05 4:35

MoZ

24-Jan-05 4:35

Can someone point me in the right direction to find API for 802.11. I want to create an application to retreive/change the WEP key(s) of a wireless device via 802.11b in Visual C++. Is there a generic set of API's? Sigh | :sigh:

Moz
Tunis - Tunisia

Re: API to wireless device configuration

geo_m24-Jan-05 6:19

geo_m

24-Jan-05 6:19

Never did it before, but might be, that IProvisioningProfileWireless::CreateProfile can help you as a search string in MSDN.

Re: API to wireless device configuration

MoZ24-Jan-05 20:19

MoZ

24-Jan-05 20:19

Thank you,
I will look.

Moz
Tunis - Tunisia

cast from CString to char [MAX_PATH]

madretierra24-Jan-05 3:02

madretierra

24-Jan-05 3:02

Hello,

i have an ip adress in CString format and I need to transform it in char [MAX_PATH] format ...

Does anybody have an idea how to do that ?

Thanks a lot for help and have a nice day !

There is no way to happiness, happiness is the way !

Re: cast from CString to char [MAX_PATH]

James R. Twine24-Jan-05 3:49

James R. Twine

24-Jan-05 3:49

You do not transform from a CString to a char array, but you can copy one to the other:

<br />
    CString sTheIP( "192.168.0.1" );<br />
    char    caCharArray[ _MAX_PATH + 1 ];<br />
<br />
    ::strncpy( caCharArray, sTheIP, _MAX_PATH );<br />
    caCharArray[ _MAX_PATH ] = '\0';<br />

If whatever you need to pass the char array to only needs a const char * (LPCSTR), you can pass the CString directly; it has an operator for const TCHAR *.

Peace!

-=- James
Tip for inexperienced drivers: "Professional Driver on Closed Course" does not mean "your Dumb Ass on a Public Road"!
Articles -- Products: Delete FXP Files & Check Favorites

Re: cast from CString to char [MAX_PATH]

madretierra24-Jan-05 5:10

madretierra

24-Jan-05 5:10

A thousand of thanks James !

It works fine and your help is a jewel, thank you very much !

alain costanza

There is no way to happiness, happiness is the way !

LockWindowUpdate - BUG ???

Danoo24-Jan-05 1:42

Danoo

24-Jan-05 1:42

Hi y'all

I used LockWindowUpdate to prevent my CListCtrl and CTreeCtrl from redrawing while the whole items were repopulated. It works fine, except that upon unlocking the whole desktop and all its child windows receive WM_PAINT messages...
I thought that only this mechanism operates only on the locked window... anyway, when I remove the LockWindowUpdate lines in my code, only my controls are flickering, the rest of the desktop remains untouched...

All this seems very strange to me...

Anybody else had similar experiences?

Regards
Daniel

Re: LockWindowUpdate - BUG ???

Tim Smith24-Jan-05 1:57

Tim Smith

24-Jan-05 1:57

Use WM_SETREDRAW. LockWindowUpdate is a nasty call that causes is lot of problems if not used properly.

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

Re: LockWindowUpdate - BUG ???

Danoo24-Jan-05 2:29

Danoo

24-Jan-05 2:29

Thanks for your suggestion. I tried it, and it seems to me that SetRedraw is not implemented for all controls. I'm using a CListCtrl and according to the MSDN doc they talk about CListBox in their examples...

Is there any other alternative?
Or what is the proper way of using LockWindowUpdate? It would work exacly how I want it to, except that the all open application windows receive WM_PAINT messages... Frown | :(

Re: LockWindowUpdate - BUG ???

Joel Lucsy24-Jan-05 2:58

Joel Lucsy

24-Jan-05 2:58

WM_SETREDRAW works for CListCtrl. I've used it. Avoid LockWindowUpdate like the plague.

--
Joel Lucsy

Re: LockWindowUpdate - BUG ???

RChin24-Jan-05 4:14

RChin

24-Jan-05 4:14

Have a look at the docs for SetRedraw()[^].
It has a brief example for your CListCtrl class.
Being a CWnd derived function, it should also work for any CWnd derived controls.

I Dream of Absolute Zero

Re: LockWindowUpdate - BUG ???

Tim Smith24-Jan-05 4:21

Tim Smith

24-Jan-05 4:21

If it doesn't work, then your code has other bugs in it. I know that doesn't really help you out a lot, but time and time again I see people waste time trying to figure out why the operating system isn't working when it turns out that our code just has a simple bug.

I'm not bitching at you or saying you are a bad programmer. We all do it. I recently wasted two hours trying to figure out why MFC's wait cursor wasn't working when it turned out I just forgot to specify a variable name.

i.e.

CWaitCursor;

instead of

CWaitCursor waitCursor;

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

std::out_of_range

Anonymous24-Jan-05 1:11

Anonymous

24-Jan-05 1:11

Hi,
I get this runtime error
Unhandled exception at 0x7c59bbf3 in NewMumsEngine.exe: Microsoft C++ exception: std::out_of_range @ 0x016c605c.

when I try to execute this line

sVarData = m_pElement[iPos].sValue.substr(iIndex+1);
where
sVarData is of string type.
m_pElement[iPos] is an object of a structure
sValue is another string variable in the same structure.

Can anyone please explain this error to me and tell me how to remove it.Any suggestions please?

thanks,
Arjun.

Re: std::out_of_range

Mike Dimmick24-Jan-05 1:23

Mike Dimmick

24-Jan-05 1:23

You don't say what type m_pElement is but I presume it's a pointer to a C-style array. I'd therefore guess that iIndex + 1 is greater than the length of sValue, assuming that sValue is a std::string.

You probably need to check that iIndex is less than the length of sValue before performing this operation.

Stability. What an interesting concept. -- Chris Maunder

Re: std::out_of_range

markkuk24-Jan-05 3:11

markkuk

24-Jan-05 3:11

substr() throws out_of_range when the index is beyond the end of the string. Check the iIndex value.

difference between console based programming and event based coding

phijophlip24-Jan-05 0:43

phijophlip

24-Jan-05 0:43

Hello

What is difference between console based coding and event based coding
in window platform

Frown | :(

Philip

Re: difference between console based programming and event based coding

David Crow24-Jan-05 2:38

David Crow

24-Jan-05 2:38

The former runs in a console window (as opposed to GUI), while the latter is based on events (as opposed to synchronous). They are not necessarily mutually exclusive.

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

Creating a Tree Structure

Pazzuzu24-Jan-05 0:43

Pazzuzu

24-Jan-05 0:43

Hi All,

I want to build a structure of userdefined elements,which will be having child & subchild elemetnts as well(Like a Tree Structure). Using STL or so...

Is there any build-In facility in c++,by which I could create a tree structure like this & query for elements as well, within this structure.

If not any suggestions how to proceed.....

Thanks...

Re: Creating a Tree Structure

HurricaneFlossie25-Jan-05 13:04

HurricaneFlossie

25-Jan-05 13:04

Try using an XMLDOMDoc. You can use XPath syntax to navigate the tree and find nodes. XML is a self-defining tree structure which includes it's own navigation functions. Sounds like a perfect answer to you problem.

Check out the following links.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/xmlsdk/html/xmobjxmldomdocument.asp

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/xmlsdk/html/xmrefxpathsyntax.asp

Some people see things that are and ask, Why? Some people dream of things that never were and ask, Why not? Some people have to go to work and don't have time for all that ...
Author: George Carlin

Re: Creating a Tree Structure

Pazzuzu26-Jan-05 3:58

Pazzuzu

26-Jan-05 3:58

Thanks,Will try in that direction...

Stunning GUI .. How ?

AbinThomas24-Jan-05 0:27

AbinThomas

24-Jan-05 0:27

hi,
recently i got some work which needed a good GUI. I did a lot of time googling but became even more confused. i hav seen stunning gui's like those of google's picasa, acdc6 ... How do they do it ?
Several sites advices to use a manifest file to make application Theme aware in XP. it works fine but only with Xp. should i go with using bitmaps for all the controls and dialog backgrounds, OR use a third party tool like BCG/codejock software.
I am a beginner and can anyone please give an advice on how to start with this. i am so desparate to make my controls and other parts of my application
look great. any help is highly appreciatable WTF | :WTF:

thankx,
abin

Re: Stunning GUI .. How ?

Maximilien24-Jan-05 3:07

Maximilien

24-Jan-05 3:07

application like picasa manually draw their own GUI, either by using bitmaps, or simple GDI drawing.

Doing a complete UI package for your software can be time consumming, and should only be done if it's absolutly necessary, or that you have both time and money; BUT it can be really fun to do.

Also, have a look at topics that talk about skinning application.

Maximilien Lincourt
Your Head A Splode - Strong Bad

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