debuging ON_NOTIFY_REFLECT question ... (edited) - C / C++ / MFC Discussion Boards

Grahamfff16-Nov-04 10:48

16-Nov-04 10:48

For a MFC application I have been using the standard windows timers (WM_TIMERS - SetTimer() etc).

However sometimes data is missed, I was thinking of using Multimedia timers.

The resolution of my PC is 1 msec (I though it was 10 msec via a timer program).

My question is: Is 50 msec too hard for Windows 2000 to meet.

It is difficult to test for missing data, but I think the Multimedia timers are also missing some data. Do I need to rethink the situation?

grahamfff

Re: Timers ~ 50 msec

Neville Franks16-Nov-04 11:14

Neville Franks

16-Nov-04 11:14

Multimedia timers would likely be better, however I would think processing incoming data would be better handled in a worker thread and posted back to the main thread.

Neville Franks, Author of ED for Windows www.getsoft.com and Surfulater www.surfulater.com "Save what you Surf"

Re: Timers ~ 50 msec

namaskaaram16-Nov-04 17:13

namaskaaram

16-Nov-04 17:13

i seriously dont think that 50ms could be the reason.....they are interrupts(timer) and therefore they are serviced at the rigth time.....;)

Re: Timers ~ 50 msec

Alexander ^M.,17-Nov-04 9:59

Alexander ^M.,

17-Nov-04 9:59

Always remember: Windows is NOT a real-time OS!

Don't try it, just do it! Wink | ;-)

HTML Help: Using F1

digwizfox16-Nov-04 10:44

digwizfox

16-Nov-04 10:44

I'm getting some weird results in my MFC application when I press F1 over a menu item. For some reason, I get an error "cannot open Help" when I press F1 over certain menu items. It seems totally random. I never did anything special to make it work for any of the items anyway. When I created the application, I enabled HTML help. I've been able to change the table of contents and add help files. But one thing I have not figured out is how to control what pops up when F1 is pressed. For most of the menu items, it works fine. For instance when I put the mouse pointer over the view -> status item and press F1 it immediately brings up the status help screen with the Main Help dialogue. When I do the same over File -> open or Help -> help topics I get the error message. I'm not finding anything specific in MSDN library.

What is the trick here? I know I can handle a message to respond to F1 and have done this. But I was hoping to find another way. I mean after all, 95% of the menu items work fine when I press F1 but I have no idea what gives for the very few where it doesn't work.

Also, in one of my dialogues I have written code for the function:

HtmlHelp(NULL, HH_DISPLAY_TOPIC);

Now this will display the main help window. The NULL could be a pointer to something. I don't know what it is a pointer to. Does anyone know? How do I use the first argument to cause a specific help topic to display within the help dialogue? I've tried a few things and don't think the documentation is entirely clear on what I am supposed to point the function to. Any ideas?

Thank you,
Shawn

Re: HTML Help: Using F1

Debs16-Nov-04 23:12

Debs

16-Nov-04 23:12

I've just wrestled with similar issues myself, and found the following liks useful, if you haven't already found them:

http://www.mshelpwiki.com/[^]

http://www.smountain.com/resource/CPPHTMLHelp.pdf[^]

Debbie

RAS

Den2Fly16-Nov-04 10:14

Den2Fly

16-Nov-04 10:14

Hello everybuddy,
I have developed a simple dialer application that uses RAS ocx component to dial a RAS server. I set three of its properties as 'PhoneNumber', 'UserName' & 'Password' and start dialing, but Authentication fails although I am sure my credentials are correct. (I can connect using Windows' connection)

I am not sure if just these three properties are sufficient to be set, or anything that I haven't noted,... I need your gaidance.

Thank you,
- den

---
"Art happens when you least expect it."

debuging ON_NOTIFY_REFLECT question ... (edited)

Maximilien16-Nov-04 8:48

Maximilien

16-Nov-04 8:48

I have a ON_NOTIFY_REFLECT handler that does not get called.

I tried the same ON_NOTIFY_REFLECT in another dummy application with the same GUI layout and hierarchy, and the handler is called.

Is there a way to know where the message is blocked ?

the message is

ON_NOTIFY_REFLECT( NM_CUSTOMDRAW, OnCustomDraw )

To do a custom draw on a CTreeCtrl derived class.

(edit)
Never mind me ... I was brain dead for a couple of minutes ...

I already had NM_CUSTOMDRAW handled in the parent window.

Thanks.

Maximilien Lincourt
Your Head A Splode - Strong Bad

CHttpFile - how could i parse it?

Cris16-Nov-04 8:40

Cris

16-Nov-04 8:40

Hello,
How could i parse a CHttpFile object (response from a HTTP request)?
Which class can i use?

[]'
Cris

Re: CHttpFile - how could i parse it?

22491717-Nov-04 18:24

224917

17-Nov-04 18:24

IHTMLDocument2

There is no spoon.

mail

Re: CHttpFile - how could i parse it?

Cris17-Nov-04 23:11

Cris

17-Nov-04 23:11

Thank you for your help, but this class is not from Visual C documentation.
I have solve my problem simply interpreting the xml received like a text.

[]'s
Cris

DLLHOST / ISAPI / Memory Leaks?

Peter Weyzen16-Nov-04 8:01

Peter Weyzen

16-Nov-04 8:01

Howdy All-

I am not sure where to post this -- but being a C++ program, this is as good a place as any.

I've got this DLL, written as a resources for IIS.
It loads via DLLHost and and ISAPI DLL....
It uses MSXML3

It leaks bytes.

Anyone have any good clues how to debug a DLL, looking for memory leaks, when it's loaded in someone else's process? Inside DLLHOST?

Any and all clues are welcomed!

Thanks in advance
-peter

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<A HREF="http://www.santacruznetworks.com">Santa Cruz Networks</A>

Huge Text Files

JoeGonzalez16-Nov-04 7:32

JoeGonzalez

16-Nov-04 7:32

Saludos:

I am in the need for reading huge text files and displaying the contents of
the file page by page. I have read many of the articles in the Doc/View
section but right now I am confused into wich way to go. I am an experienced
mainframe programmer but really a newbee in MFC/C++. Any help with this will be very much appreciated.

Cordially;

Joe González

Re: Huge Text Files

David Crow16-Nov-04 8:40

David Crow

16-Nov-04 8:40

JoeGonzalez wrote:
I am in the need for reading huge text files

How huge is "huge?" Have you considered a CEdit or CRichEdit control? Are the files viewable by, say, Notepad? If so, why not just use it?

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

Re: Huge Text Files

digwizfox16-Nov-04 11:24

digwizfox

16-Nov-04 11:24

Good question. Also keep in mind that when it comes to "HUGE", say > 100MB of text data, I would not recommend using notepad. Notepad is terribly inefficient for some reason. Wordpad handles large text files, for viewing, much more effectively.

Re: Huge Text Files

David Crow17-Nov-04 2:32

David Crow

17-Nov-04 2:32

digwizfox wrote:
Notepad is terribly inefficient for some reason. Wordpad handles large text files, for viewing, much more effectively.

I'm aware of Notepad's inefficiencies. I was only using it as an example as more folks are familiar with it than are Wordpad.

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

Re: Huge Text Files

JoeGonzalez20-Nov-04 6:02

JoeGonzalez

20-Nov-04 6:02

What I mean by huge is an average of 4 to 10 gb each file. These files are generated by a mainframe process. By regulatory requirements, I can not modify the contents of the files or split then in any way. The MFC's CEdit and CRichEdit do have a limitation. Neither Notepad or Wordpad are capable of displaying these files in an acceptable way.

I will appreciate wery much any help you can give me on this problem.

set high priority

LeeeNN16-Nov-04 6:51

LeeeNN

16-Nov-04 6:51

How Can I set my app with high priority? SetPriorityClass() & SetThreadPriority() how to use them? Thanks. Confused | :confused:

Re: set high priority

David Crow16-Nov-04 8:46

David Crow

16-Nov-04 8:46

Would the following work:

SetPriorityClass(GetCurrentProcess(), HIGH_PRIORITY_CLASS);

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

Strange way of killing DLLHOST

Federico Milano16-Nov-04 5:57

Federico Milano

16-Nov-04 5:57

Hi,

I'm working on a web service programmed with ATL Server templates and classes. This web service is under testing in a Windows 2000 Server, IIS 5. It's running with high (isolated) application protection (so a new DLLHOST process appears when I make a request to my web service). I've noticed (using Process Explorer) that when an unhandled exception raises, Windows kills all my components in the DLLHOST process, but doesn't kill the DLLHOST process itself (of course, the user owned one, not the system DLLHOST). I just want to know why it behaves like that. Is it not supposed to kill the whole process that produces an unhandled exception?

Thanks,

Federico

Executing a SQL Script

Ivan Cachicatari16-Nov-04 4:45

Ivan Cachicatari

16-Nov-04 4:45

Hi everyone again.

I have other problem with CDaoDatabase class. When I attempt execute a long query (more 200 characters) occurs an fatal error.

Why?

The query string less than 200 characters executes successfully.

I'm using Visual C++ 6 SP5 on Windows 98se and MSDE2000 (MySQL too).

Ivan Cachicatari
www.latindevelopers.com

Re: Executing a SQL Script

si_6916-Nov-04 5:21

si_69

16-Nov-04 5:21

try using 2 strings, and joining them together

i use something like

ptrCmd->CommandText = _bstr_t(strSQL1+strSQL2);

it works for me

Wink | ;-)

Re: Executing a SQL Script

Ivan Cachicatari20-Nov-04 4:07

Ivan Cachicatari

20-Nov-04 4:07

Thanks very much.

now using _bstr_t class.

CString sql1 = _T(" SELECT ... ;");
_bstr_t sql2(sql1);

m_Conn->Execute(sql2,&options);

Ivan Cachicatari
www.latindevelopers.com

Re: Executing a SQL Script

Antony M Kancidrowski16-Nov-04 6:13

Antony M Kancidrowski

16-Nov-04 6:13

What code are you attempting to execute and what is the error?

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)

Problems with CPropertySheet

Ivan Cachicatari16-Nov-04 4:41

Ivan Cachicatari

16-Nov-04 4:41

Hello everyone.

I have a problem with the CPropertySheet class, when I attempt close the Property Sheet dialog from outside, occurs an fatal error.

CWnd *mainWnd = AfxGetMainWnd();<br />
CWnd *wndToDestroy;<br />
wndToDestroy = mainWnd->GetActiveWindow();<br />
<br />
if(wndToDestroy)<br />
{<br />
	wndToDestroy->PostMessage(WM_CLOSE);<br />
}

Somebody knows another way to close the CPropertySheet dialog from outside?

I'm using Visual C++ 6 SP5 on Windows 98se

Ivan Cachicatari
www.latindevelopers.com

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