C / C++ / MFC

Re: VisualStudio - ClassView / Gloabs : missed functions

17-Sep-02 8:51

You could write dummy functions that fool ClassView into thinking your project implements them, but that the compiler ignores. Put the functions in some cpp file and wrap them like this:

#ifdef _SOME_DEFINE_THAT_IS_NEVER_DEFINED_
float ngn_sign(float f)
{
}
#endif  // #ifdef _SOME_DEFINE_THAT_IS_NEVER_DEFINED_

</code>

ClassView will now show them under Globals, because ClassView doesn't care about preprocessor directives like that. The compiler does, of course, and that code will never be included so long as you don't actually define the tag.

"The significant problems we face cannot be solved at the same level of thinking we were at when we created them." -Albert Einstein

Lockhart17-Sep-02 10:51

Lockhart

17-Sep-02 10:51

Thanks for the trick Smile | :)

How to programmatically disable network card

Jonathan Gilligan17-Sep-02 6:27

Jonathan Gilligan

17-Sep-02 6:27

I have an application that runs under Win2K Pro and needs to disable the network card temporarily (I need to have as close to real-time response as possible and I don't want the CPU interrupted to deal with network activity). I can ask the user to go to the control panel and disable the network card, but is there a way to do this programmatically?

Thanks for any advice.

jmkhael17-Sep-02 6:38

jmkhael

17-Sep-02 6:38

hav an idea, u can try it: surely the control panel is setting some entry in the registry to false or something like that, so all u need is try to know that entry.

If this ever exists, (hope it does) u can spy it using RegMon tool on the www.sysinternals.com

Hope this help

Papa
Murex Co.

while (TRUE)
Papa.WillLove ( Bebe ) ;

TyMatthews17-Sep-02 9:04

17-Sep-02 9:04

While not an answer to your question, have you looked at maybe using CreateProcess() to start your app in REALTIME mode? This will give you the highest possible priority, above nearly everything else, without having to disable other processes or drivers. You could write a little proxy application whose sole job is to launch your actual app by calling CreateProcess() with a creation flag of REALTIME_PRIORITY_CLASS.

Just a word of caution, of course... if you do it this way you will have priority above even disk I/O. Like the friendly manual states, if your process runs for more than a very brief interval, you can "cause disk caches not to flush or cause the mouse to be unresponsive."

If REALTIME is too much, there are also HIGH_PRIORITY_CLASS and ABOVE_NORMAL_PRIORITY_CLASS (Win2000) flags that are not quite as severe, but still preempt normal apps. Just take a gander at the CreateProcess() docs.

"The significant problems we face cannot be solved at the same level of thinking we were at when we created them." -Albert Einstein

Jonathan Gilligan17-Sep-02 9:42

Jonathan Gilligan

17-Sep-02 9:42

Thanks for the thought. I have indeed been experimenting with this with some success. However, it's also a good thing to turn off sources of hardware interrupts that I would just as soon avoid. I deal with the disk I/O problem by using a gigabyte of RAM, locking pages in memory, and avoiding any file I/O until the acquisition is complete.

Since I only need this priority level for a small portion of my application's running time, I use SetPriorityClass() rather than CreateProcess().

I am trying to capture 5000 frames per second from a high-speed camera, so I am trying to avoid even an occasional millisecond of latency.

I would really like to work with an RTOS, such as QNX, but the frame grabber board I must use only has drivers for Windows.

TyMatthews18-Sep-02 4:42

18-Sep-02 4:42

I did a quick google search and came up with a few things that might help. Someone mentioned that there's a sample in the Windows DDK, under NTDDK\src\general\setup\Enable. Whether that has disable code or not, I'm not sure Smile | :)

More interestingly, there's an external program named DevCon that might do the trick, and apparently Microsoft gives out the source code in their latest XP DDK:

DevCon.exe KB Q311272[^]

"The significant problems we face cannot be solved at the same level of thinking we were at when we created them." -Albert Einstein

Jonathan Gilligan18-Sep-02 6:05

Jonathan Gilligan

18-Sep-02 6:05

Thanks a million! Those pointers help me with exactly what I need. For the moment, calling DevCon from my application should do just what I need. Sometime later, I can see about incorporating the DDK code into my application's core.

Thanks so much for pointing me an answer.

TyMatthews18-Sep-02 6:09

18-Sep-02 6:09

Glad to help Smile | :)

"The significant problems we face cannot be solved at the same level of thinking we were at when we created them." -Albert Einstein

Re: System tray ALERTS ??

PJ Arends17-Sep-02 14:57

PJ Arends

17-Sep-02 14:57

Just a wild guess, but have you looked at the CloseClusterNetInterface() function?

CPUA 0x5041

Sonork 100.11743 Chicken Little

"So it can now be written in stone as a testament to humanities achievments "PJ did Pi at CP"." Colin Davies

Within you lies the power for good - Use it!

DataExchange

Steve Daly17-Sep-02 5:52

Steve Daly

17-Sep-02 5:52

What is the correct way to update the FormView(EditBoxes)on the fly from the Document after the OnInitialUpdate? I am currently using a pointer to the View object, this works but seems to me that it is by-passing the rules of encapulation.

Steve Daly

Re: DataExchange

Joaquín M López Muñoz17-Sep-02 6:11

Joaquín M López Muñoz

17-Sep-02 6:11

See UpdateAllViews.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

System tray ALERTS ??

petrol17-Sep-02 5:40

petrol

17-Sep-02 5:40

Hi there !!

I am currently working on my term project in VC++ using MFC. I want to implement MSN Messenger type System tray alert messages (which appears when a user signs in or a new email is recieved ) in MFC. If anyone could tell me how to implement it , which classes to use or could tell me any references or any example, I would be obliged. Big Grin | :-D

Petrol.

jmkhael17-Sep-02 6:42

jmkhael

17-Sep-02 6:42

http://www.codeguru.com/dialog/TaskbarNotifier.html

Papa
Murex Co.

while (TRUE)
Papa.WillLove ( Bebe ) ;

MFC42.dll

orcun colak17-Sep-02 5:26

orcun colak

17-Sep-02 5:26

My question has two parts.
In order to split my project into smaller parts I had to create an mfc extension dll. According to msdn, extension dlls can only use mfc as shared dll although VC 6.0 allows me to link with static mfc library too.(?? I am confused here) Also using extension dll forces me to link my client.exe with shared mfc dll too. Can I avoid all of these and link all extension dlls,client.exe with static library. is there a trick for this ?
Second question is if I use shared mfc dlls do I have to distribute them with my installation or do they come with windows setup by default. The dlls are mfc42.dll and msvcrt.dll
I hope my questions are understandable because I am confused because of this static , dynamic mfc stuff.
Thank you

Orcun Colak

Re: MFC42.dll

Pavel Klocek17-Sep-02 6:39

Pavel Klocek

17-Sep-02 6:39

MFC Extension DLL is an add-on for MFC42.dll. It needs it by design.

orcun colak wrote:
do I have to distribute them with my installation
You need to redistribute them.

Pavel
Sonork 100.15206

Updating and changing Title Bar in Application

oRion17-Sep-02 5:21

oRion

17-Sep-02 5:21

I have been looking through the threads of in the board.Can't seems to be able to understand how to do it. I need to get rid of the ugly message in the Title bar with "Untitled - myprogram" and update it with my own message. Anyone that can help me on that?
Please try to include some lines of codes. I am really very new in VC++ 6.0.

Confused | :confused:

Thanks!

Re: Updating and changing Title Bar in Application

jmkhael17-Sep-02 6:35

jmkhael

17-Sep-02 6:35

Try looking up SetWindowText in ur MSDN, sorry about lines of code, but its nearly:

in the MainFrame Class or dialog class u call:

SetWindowText ( _T("Ur title") ) ;

Papa
Murex Co.

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: Updating and changing Title Bar in Application

oRion17-Sep-02 22:27

oRion

17-Sep-02 22:27

Thanks for the information. I was trying a few ways to
do it and it's working!! Just curious, is there anyway I could replace the whole line of the title bar. I mean I could replace the Untitled part, but not able to get rid of
the program name at the end of the string.

Big Grin | :-D

how to recognize word from sentence?

wey_horng17-Sep-02 5:12

wey_horng

17-Sep-02 5:12

i try to recognize by using space, but unsuccess. it might be the coding error. can someone pls show me the coding.thanks. ur reponse will be appreciated for me.

Shaun Wilde17-Sep-02 5:20

Shaun Wilde

17-Sep-02 5:20

you will also have to use punctuation marks such as '.',',',';' etc. Hyphens are also wierd as they can indicate a joining of words or that a word has been split to allow it to wrap at the end of a line (not end of sentence), this normally happens after the 3rd charcter.

eg con-
tinutation

Stupidity dies.
The end of future offspring.
Evolution wins.
- A Darwin Awards Haiku

Bart Robeyns17-Sep-02 5:30

Bart Robeyns

17-Sep-02 5:30

Splitting of words happens between two syllables. e.g.: Split-ting, not Spl-itting Smile | :)

Shaun Wilde17-Sep-02 5:39

Shaun Wilde

17-Sep-02 5:39

true - but I remember a 3 letter rule as well that you do not break the word if the first part is less than 3 letters but just start it on the next line.

Stupidity dies.
The end of future offspring.
Evolution wins.
- A Darwin Awards Haiku