C / C++ / MFC

Bram van Kampen16-Nov-06 14:53

16-Nov-06 14:53

What Environment are you working in. CreateThread is essentially an SDK function. It can only be called as part of an environment you create first. The only sensible reason to call this function would be if you want to do something very smart that surpasses the capabilities of MFC, but it would require setting up accordingly. If you do not understand this requirement, the chances are that you do not need the options on offer there, and straight MFC would be your best option.

If you are working in MFC, you should rarely use 'CreateThread at all, if you do it could realy upset things, unless if you fully understand how it interracts with MFC. Instead you use:

AfxBeginThread(pFun,lpParam);

This starts a thread with pFun(lpParam);
It also has all the 'uglies' hidden inside the MFC Library.
Believe Me it is a lot easier to handle!

LateNightsInNewry

ThatsAlok16-Nov-06 23:17

ThatsAlok

16-Nov-06 23:17

actually (*lpParam) is just a void pointer.. you have to define some Function Pointer to it to call it the required function!

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

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
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edvintas18-Nov-06 4:25

edvintas

18-Nov-06 4:25

Here I found very simple way of doing this: Smile | :)

void fff()
{
  MessageBox(0,"ehlo","helo",0);
}
DWORD CALLBACK mhThread(LPVOID lpParam)
{
  ((void(*)(void)) lpParam)();
  return 0; 
}
CreateThread(0, 0, mhThread, fff, 0, 0);

but... can somebody explain what does this mean: ((void(*)(void)) lpParam)(); ? Confused | :confused:

it looks confusing... D'Oh! | :doh:

and thank you again for replies Rose | [Rose]

CPallini20-Nov-06 4:54

CPallini

20-Nov-06 4:54

Simply a cast to a function pointer, the function returning no value and accepting no args. Maybe this clearify a bit the code:

typedef void (*LPFUNC)(void);
 
void mhThread(void * lpParam)
{
  LPFUNC lpFunc = (LPFUNC) lpParam;
  (*lpFunc)();
}

Post Processing

BlitzPackage16-Nov-06 10:17

BlitzPackage

16-Nov-06 10:17

Someone in their article instructed users to "remove all post processing call to upx...". What does that mean and how do I do that?

Thanks,
BP

Re: Post Processing

C^hris L^osinger16-Nov-06 10:48

C^hris L^osinger

16-Nov-06 10:48

that could mean the Post-Build Step in Project Settings.

image processing | blogging

Re: Post Processing

BlitzPackage16-Nov-06 14:06

BlitzPackage

16-Nov-06 14:06

Thanks Chris, I'll check it out.

IE7 and Creating Windows

Al_Pennyworth16-Nov-06 9:31

Al_Pennyworth

16-Nov-06 9:31

Hey all,
I have a strange question to ask. I have an app that performs some functions when a user is logged in or logged out. The functions are performed in separate threads and a dummy window is created so it can be used as the parent for windows that are popped up during this functionality.

Here is my problem: after I updated one of my machines to IE7, this functionality will only work if I am logged in and I run it manually. In debugging, the call to SetWindowPos never returned, even though the values were good. Other times, I try to circumvent the code and it fails elsewhere. I am using CreateWindow to create the dummy window and it contains a good window handle.

Any ideas what might be causing this problem? Any thoughts on what I can look at? I am completely stumped, my application doesn't even use anything from IE7 but after the install (and eventual uninstall) it still has a hangup.

Bram van Kampen16-Nov-06 14:57

16-Nov-06 14:57

What is IE7?

LateNightsInNewry

Mark Salsbery16-Nov-06 15:33

16-Nov-06 15:33

LateNightsInNewry wrote:
What is IE7?

Why, it's the next step up from IE6, of course! Smile | :)

Bram van Kampen16-Nov-06 15:52

16-Nov-06 15:52

So, Let's Cut the Crapp, what's IE0, other than the step up from IE-1 Sigh | :sigh:

LateNightsInNewry

Mark Salsbery16-Nov-06 15:55

16-Nov-06 15:55

LateNightsInNewry wrote:
So, Let's Cut the Crapp

OK Internet Explorer Version 7

Hamid_RT16-Nov-06 20:21

Hamid_RT

16-Nov-06 20:21

Wow

WhiteSky

Mark Salsbery17-Nov-06 4:00

17-Nov-06 4:00

Hamid_RT17-Nov-06 4:55

Hamid_RT

17-Nov-06 4:55

I was wondered why you written IE7 Smile | :)

WhiteSky

Mark Salsbery17-Nov-06 5:00

help me please ... [modified]

17-Nov-06 5:00

Because....

LateNightsInNewry wrote:
What is IE7?

omc7916-Nov-06 9:02

omc79

16-Nov-06 9:02

can anybody help me in implementing blowfish algorithm for encryption/decryption between client and server in unix enviornment.
i dont have a clue how to do it..

-- modified at 15:08 Thursday 16th November, 2006

Chris Meech16-Nov-06 9:07

Chris Meech

16-Nov-06 9:07

poklmnbjihgyurybdgsyrwpkdfjisgcdhwkuqihwvdgfacekg;hprkla;lfjgupweorutypqpwliorujmnxb.

There's a clue, but sorry it's encrypted. Poke tongue | ;-P

Chris Meech
I am Canadian. [heard in a local bar]
I agree with you that my argument is useless. [Red Stateler]
Hey, I am part of a special bread, we are called smart people [Captain See Sharp]
The zen of the soapbox is hard to attain...[Jörgen Sigvardsson]
I wish I could remember what it was like to only have a short term memory.[David Kentley]

Christian Graus16-Nov-06 9:10

Christian Graus

16-Nov-06 9:10

Wow - you got off lightly.

Please don't post programming questions in the lounge ( as it said in big red letters as you typed this ), I've moved this to the most likely place for you to get an answer ( on this Windows programming site ).

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

C^hris L^osinger16-Nov-06 9:50

C^hris L^osinger

16-Nov-06 9:50

use Google to find the Crypto++ library.

image processing | blogging

George L. Jackson16-Nov-06 11:31

George L. Jackson

16-Nov-06 11:31

If you had searched The Code Project, you would had found http://www.codeproject.com/cpp/blowfish.asp[^]

Bram van Kampen16-Nov-06 15:12

16-Nov-06 15:12

Dear OMC79

I think your best chance is to subscribe to the course, attend the lectures, read the books, and try again next year.

LateNightsInNewry

Hamid_RT16-Nov-06 19:55

Hamid_RT

16-Nov-06 19:55

Did you search on www.codeproject.com and www.codeguru.com

WhiteSky