C / C++ / MFC Discussion Boards

joblemar10-Dec-02 6:00

joblemar

10-Dec-02 6:00

I'm trying to use a keyboard accelerator in my aplication (and MFC dialog based application). I want to handle the event that happens when the user presses a combination of Ctrl + Shight + N, so I have defined a new Line int the Accelerator editor with this values:

ID = ID_ACELERATOR_NEXT , Modifier = Ctrl + Shift, Key = N, Type= VIRTKEY.

Also I have defined in my dialog message map the following line:

ON_COMMAND(ID_ACCELERATOR_NEXT, OnAcceleratorNext)

but it doen't works. I can't handle the event. What I'm doing wrong ?

Thanks.

Memory problem with webbrowser OCX!!!

Nasty_p10-Dec-02 5:06

Nasty_p

10-Dec-02 5:06

Hi!

I've developed an application whitch calls (by pressing a button, using DoModal) a dialog window with a webbrowser control into it (using the CWebbrowser2 class). The application works great but I've noticed that each time I execute (or refresh) my web browser dialog the application's memory usage increases every time (by about 300-400k)!!! I can start of with a 6 meg application and end up with one using 40 meg in memory... Then the application crashes!

My question is:
1 - Could it be something related to the browser's cache!?
2 - How can clear memory usage to avoid crashing?
3 - Could it be an OCX-related problem?

Thanx!!!

-------------
-= Nasty_p =-

To get information from a register

rsasalm_10-Dec-02 5:03

rsasalm_

10-Dec-02 5:03

Hi all,

I have a very trivial question.
I have a 16-bits register. How to retrieve n-LSBs and nHSBs from the register.

Give some examples
thanks
regards

/rsasalm

Re: To get information from a register

valikac10-Dec-02 7:43

valikac

10-Dec-02 7:43

I am sure there are C++ library functions do get the lByte and hByte. Nonetheless, the simple solution is ASM.

_asm()
{
mov ax, twoBytes
mov high, ah
mov low, al
}

Kuphryn

VC .NET and the ! toolbar button

ns10-Dec-02 4:47

10-Dec-02 4:47

I added the debug toolbar to my IDE but it didnt put the ! for execute without debug button in the bunch. In the customize debug toolbar dialog I dont see any way of adding the exclamation mark. I miss that button. Is it just not there anymore? Its in the menu item...

Appreciate your help,
ns

I NEED HELP!!

Sunnygirl10-Dec-02 4:46

Sunnygirl

10-Dec-02 4:46

hello @all,

first a short introduction:

i have an mdi program and the menu contains:

File
|
v
Service

when i pressed the service, a dialog should open, where i can enter a correct password and press 'OK'. if the password is right the menu should look like:

File
|
v
Service
IamHere

i tried:

the first menu is the mainframe menu and then i make a second menu (IDR_MENU_PW). after i pressed the 'OK' this happens:

<br />
	UpdateData(true);<br />
<br />
	if(m_strPW=="Hello")<br />
	{<br />
		HMENU menu;<br />
		menu = LoadMenu(AfxGetApp()->m_hInstance, MAKEINTRESOURCE     (IDR_MENU_PW));<br />
				::SetMenu(*(AfxGetApp()->m_pMainWnd), menu);<br />
		CDialog::OnOK();<br />
<br />
	}<br />
	else<br />
	{<br />
		CString wrong;<br />
		wrong.Format("Wrong PW");<br />
		MessageBox(wrong, "Attention!", MB_ICONERROR | MB_OK);<br />
	}

now the second menu 'opens' and the first one is 'closed'.
now i want, that when i pressed 'IamHere' a messagebox opens. i make a 'COMMAND' function with the wizzard in the old class: 'MyProgrammView'.
but when i run the program, and enter the right passwort, there the second menu is, but i can not use the function behind 'IamHere'. it is grey. but when i pressed on the 'Service' i get the same dialog as before to enter my password.

what´s wrong?

thank you
sunny

Re: I NEED HELP!!

Rage10-Dec-02 5:06

Rage

10-Dec-02 5:06

I am really not competent in mdi's, but maybe this link[^] may help you. You should use something like EnableMenuItem() with MF_ENABLED flag. Just look at this one in the MSDN.

Sunnygirl wrote:
MessageBox(wrong, "Attention!", MB_ICONERROR | MB_OK);

Poke tongue | ;-P

Just love that debug windows

~RaGE();

Re: I NEED HELP!!

Hans Ruck10-Dec-02 5:12

Hans Ruck

10-Dec-02 5:12

Sunnygirl wrote:
i make a 'COMMAND' function with the wizzard

Are you sure you did it correctly? I made a test MDI application with two menus as you said - except for the dialog but i think it's ok - and everything worked properly.

rechi

Re: I NEED HELP!!

Sunnygirl10-Dec-02 5:34

Sunnygirl

10-Dec-02 5:34

thanks for reply.

i make it so often...again and again.....
but please, can you send me your complete test program?

sunny

Re: I NEED HELP!!

Hans Ruck10-Dec-02 5:32

Hans Ruck

10-Dec-02 5:32

Sunnygirl wrote:
i make a 'COMMAND' function with the wizzard in the old class: 'MyProgrammView'

If you want to have IamHere called even when no child is open, you must catch the WM_COMMAND in CMainFrame, not in MyProgrammView.

rechi

Finding PCI cards....

Trollslayer10-Dec-02 4:14

Trollslayer

10-Dec-02 4:14

Does anyone know of functions or a library (freeware or commercial) for scanning PCI devices on a PC ?
I need to write some code to access various I/O devices installed in PCs.
Thanks.

Elaine.

Would you like to meet my teddy bear ?

Re: Finding PCI cards....

Daniel Turini10-Dec-02 4:29

Daniel Turini

10-Dec-02 4:29

What are you doing? A driver? A software which needs to enumerate hardware?
The DDK have functions for this, in case of the first, although I'm not a specialist on it.
In the case of a high level program which needs to enumerate hardware, you could use WMI.

I see dumb people

Re: Finding PCI cards....

Trollslayer10-Dec-02 8:36

Trollslayer

10-Dec-02 8:36

WMI looks great, only trouble is the M$ server keeps resetting the connection WTF | :WTF:

I'll try again later.
Thanks Rose | [Rose]

Would you like to meet my teddy bear ?

Re: Finding PCI cards....

Iain Clarke, Warrior Programmer10-Dec-02 4:28

Iain Clarke, Warrior Programmer

10-Dec-02 4:28

Here is a function I wrote to locate a couple of (identical except internal serial number) cards for a
device driver I had to write. It had to be part of a device driver, but as you will probably want to
be doing kernel level stuff anyway, this shouldn't be a problem

Iain.

<br />
typedef struct {<br />
	ULONG			BaseAddress;<br />
	UCHAR			IRQ;<br />
} Iain_Hardware;<br />
<br />
#define	CARD_VENDORID	(0x494f)<br />
#define	CARD_DEVICEID	(0x0e60)<br />
<br />
// Find up to nMaxCards cards...<br />
USHORT	iain_LocateHardware(struct Iain_Hardware *pHardware, USHORT nMaxCards)	// Find the PnP devices<br />
{<br />
	PCI_COMMON_CONFIG pciConfig;<br />
	INTERFACE_TYPE	BusType		= PCIBus;<br />
<br />
	ULONG			uReturn, SlotNumber, BusNumber	= 0;<br />
	USHORT			nFound = 0;<br />
	<br />
	if (pHardware == NULL)<br />
		return FALSE;<br />
<br />
	for (SlotNumber = 0; (SlotNumber < 32) && (nFound < nMaxCards); SlotNumber++)<br />
	{<br />
		uReturn = HalGetBusData (PCIConfiguration, 0, SlotNumber, &pciConfig, sizeof (pciConfig));<br />
		if (uReturn == 0)<br />
			break;<br />
		if (uReturn < 4)<br />
			continue;<br />
<br />
		if (pciConfig.VendorID != CARD_VENDORID)	// Not the right manufacturer<br />
			continue;<br />
		if (pciConfig.DeviceID != CARD_DEVICEID)	// Not the right kind of card<br />
			continue;<br />
<br />
		pHardware [nFound].BaseAddress	= pciConfig.u.type0.BaseAddresses[2] & 0xFFF8;<br />
		pHardware [nFound].IRQ			= pciConfig.u.type0.InterruptLine;<br />
<br />
		{<br />
			int	a, b, c;<br />
			a = nFound;<br />
			b = pHardware [nFound].BaseAddress;<br />
			c = pHardware [nFound].IRQ;<br />
			DbgPrint ("Found Card %i at %x, IRQ=%i\n", a, b, c);<br />
		}<br />
<br />
		nFound++;<br />
	}<br />
<br />
	return nFound;<br />
}<br />

Re: Finding PCI cards....

Nick Parker10-Dec-02 4:30

Nick Parker

10-Dec-02 4:30

Trollslayer wrote:
Does anyone know of functions or a library (freeware or commercial) for scanning PCI devices on a PC ?

You may need to look into the DDK, take a look at

Microsoft's PCI Technology[^] site. Smile | :)

Nick Parker

Not everything that can be counted counts, and not everything that counts can be counted. - Albert Einstein

Re: Finding PCI cards....

jhwurmbach10-Dec-02 5:31

jhwurmbach

10-Dec-02 5:31

Yes, Linux Big Grin | :-D

"My opinions may have changed, but not the fact that I am right."
Found in the sig of Herbert Kaminski

CWinThread problems...

RobJones10-Dec-02 4:12

RobJones

10-Dec-02 4:12

Hello,
I have an application that spawns multiple CWinThreads in a loop.. I have absolute no problems on my development box but other machines with out visual studio are having problems..

I spawn somewhere between 5 and 60 threads every 30 seconds.. On non-development boxes some of these threads don't close, so after 10 to 12 hours I show my main process with 30+ threads and it should only have 6.. How can I trouble shoot this problem on these boxes? The thread is very simple it performs a few functions then I do a PostQuitMessage(0).. I even put a timer in the UI thread so that if it doesn't exit in 30 seconds it sends its self a PostQuitMessage(0)..

It's just strange, my development box works perfect.. but other workstations are seeing threads that don't exit..

Any ideas?

Rob

Re: CWinThread problems...

Alvaro Mendez10-Dec-02 4:57

Alvaro Mendez

10-Dec-02 4:57

You're building UI thread, right? Are you sure they need UI threads, or can you just go with worker threads?

Anyway, my guess as to why they don't quit is because you're somehow tying up the threads' message pump. If no messages can be processed, then the WM_QUIT message will not be received and the thread will not end. I have no clue as to why it works fine on your box. It may help to show some code.

Also, 60 sounds like a high number of threads for one process. It seems like the CPU will be sitting there doing a lot of context switching while allocating time for all those threads. You may want to use a more efficient method, like a thread pool, to keep the max down, to say, 20 threads.

Regards,
Alvaro

Well done is better than well said. -- Benjamin Franklin
(I actually prefer medium-well.)

Re: CWinThread problems...

RobJones10-Dec-02 5:15

RobJones

10-Dec-02 5:15

Alvaro Mendez wrote:
You're building UI thread, right? Are you sure they need UI threads, or can you just go with worker threads?

I am using sockets inside these threads.. I was told/heard/read that when ever you are using sockets in a seperate thread you have to use a UI thread because of the message pump.. Basically I have a server app that is going to sit on hundereds of machines.. once every 30 seconds I spawn UI threads to make contact with all the other servers. Once the connection is made (or not made) the servers exchange status and the UI thread exits.. It's really quite simple.. I do all the error checking on the network for failures etc.. if anything goes wrong I post a quit message.. the longest a thread should stay alive should be around 30 seconds.. thats why I put the timer in the thread..

I'll take a look into thread pools (never used them) but they sound nice Smile | :)

I could put a message pump into the thread.. Do you think this may help the thread process messages if something is tying it up? I can post code if you think that would help..

Thanks,
Rob

Re: CWinThread problems...

valikac10-Dec-02 7:50

valikac

10-Dec-02 7:50

What is the reason for a UI thread? For data processing including socket data, I recommend worker threads. Every process has a main thread that serves as a UI thread. Use itto process messages.

Kuphryn

Re: CWinThread problems...

Alvaro Mendez10-Dec-02 9:06

Alvaro Mendez

10-Dec-02 9:06

Rob, I think for a case like this, where you have all these threads running around, and working differently accross machines, your best bet is to use a logging mechanism to determine what's going on. In other words, sprinkle trace messages all over the code (for your threads) and write them to one or more log files to tell you what's going on. It's the only reliable way to debug this stuff. Of course, be sure to have the ability to easily disable them later on whenever you've worked out the kinks.

I'm not sure about needing UI threads for sockets. I'm not experienced with sockets.

Regards,
Alvaro

Well done is better than well said. -- Benjamin Franklin
(I actually prefer medium-well.)

AVI files in windows 2000

daphna10-Dec-02 3:42

daphna

10-Dec-02 3:42

I have an avi files which run o.k. on window 95'. When we put it on windows 2000 it has a strange behavior. (It start operating without any command - at least not one that I can see or get in the code).
The avi is running on an Active X.
I have created a new avi file which has the same no. of frames but is larger than the old one (The old one is 2M and the new one is 14M) and it run well.
If you know what can be the diffrences and why it behaves like this, or how can I create a good avi file which is also small, please let me know.

Rich Edit and Decimal Tab Stops

xanatos10-Dec-02 3:33

xanatos

10-Dec-02 3:33

I'm using VC.Net with ATL/WTL... But I don't think the problem is in the ATL/WTL! I'm using WinXP sp1 in Italiano (my native language). Here in Italy we use the "," (comma) as decimal point (so we write 1.000,95 instead of 1,000.95).
I've added a decimal tab stop to my RichEdit and it's working well... for an american! Smile | :)

(it uses the . instead of the , as decimal separator)... My Windows is currectly setted (other program write 1.000,95 correctly!). How can I make the Richedit work differently?

Thanks
Max

positioning CPropertySheet dialog

mariuszpopiolek10-Dec-02 2:36

mariuszpopiolek

10-Dec-02 2:36

Hi
I have CPropertySheet (it contains few pages, nothing unusual) modal dialog. After I add my pages I call DoModal. My CPropertySheet can also display another instance of itself. The problem is that newly created dialog is positioned exactly in the same position as the calling dialog, so one can miss that a new dialog has been created. My question is: how can I position newly created dialog so it won't cover the old one? Thanks in advance for any hints.

Mariusz Popiolek

Re: positioning CPropertySheet dialog

Dominik Reichl10-Dec-02 2:51

Dominik Reichl

10-Dec-02 2:51

Firstly make a new static dialog element as "area descriptor".
Then get the position of the new element as a CRect, translate it to client and move the property page to the new position.

Sample code:

CRect rcDlgs;
GetDlgItem(IDC_AREA_PAGES)->GetWindowRect(rcDlgs);
ScreenToClient(rcDlgs);

// Move pages to the page area
m_propertyWindow.MoveWindow(rcDlgs);

-Dominik

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