Communication between MainFrm and Document [modified] - C / C++ / MFC Discussion Boards

Re: c++ Project help asap

David Crow9-Aug-06 4:55

David Crow

9-Aug-06 4:55

klck2000 wrote:
float Vector[200]; //Holds the floating values

One of your requirements was to use the push_back() method to add items to the vector. What you have does not satisfy that requirement.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Re: c++ Project help asap

klck20009-Aug-06 5:00

klck2000

9-Aug-06 5:00

i cannot use the push_back method,i was having problems with understanding it.Any simple code suggestions??

klck2000

Re: c++ Project help asap

David Crow9-Aug-06 5:06

David Crow

9-Aug-06 5:06

klck2000 wrote:
Any simple code suggestions??

See here.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Re: c++ Project help asap

klck20009-Aug-06 5:10

klck2000

9-Aug-06 5:10

many thanks

klck2000

Re: c++ Project help asap

David Crow6-Oct-06 10:01

David Crow

6-Oct-06 10:01

How's it going with this project?

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Global variables crashing my app

Wheatbread8-Aug-06 9:51

Wheatbread

8-Aug-06 9:51

We have 3 variables defined at file scope. The project is for a DLL that's loaded by other modules. The globals are objects that are dynamically allocated within a C++ class method using 'new'. Within the objects, more tables (arrays) are dynamically allocated using 'new'.

We're experiencing 'memory access' crashes when somehow the globals are corrupted. Its weird because the app will work fine for awhile, then get a crash. It can happen at startup, in the middle of using the app, or right before closin the app. These variables must be global and cannot be member variables of the main class. (Long story)

If the DLL is not loaded, no crash occurs. So we're confident its the DLL.

My question, is there a way to ensure that the global pointers remain intact? Or ideas on monitoring the pointers? I thought about using static in the global definition, but wasnt sure about the effect. I also thought about making the globals variables of the main looping function, but figured since I'm calling new, I wouldnt be protected by function scope memory management.

There's something at the DLL level that's screwing us up. We're desperate for a solution to ensure global pointers are not corrupt. Ideas??

TIA,
C

Re: Global variables crashing my app

Cedric Moonen8-Aug-06 20:26

Cedric Moonen

8-Aug-06 20:26

Did you try to use your debugger ?
I know, these kind of bugs are probably hard to reproduce but if they happen quite rapidly, then using your debugger will give a lot of information.

Cédric Moonen
Software developer

Charting control

Communication between MainFrm and Document [modified]

titaniumdecoy8-Aug-06 9:41

titaniumdecoy

8-Aug-06 9:41

When a user selects the "Preferences" menu item in my application, it triggers the method CMainFrame::OnEditPreferences() in MainFrm.cpp. At that point I create a dialog and receive input from the user. Now, I need to pass that information on the document (*Doc.cpp).

I have tried GetActiveDocument() but it does not seem to contain my custom data members; do I need to cast it to another type? And if so, what headers do I need to include? Thanks for any help.

EDIT: I solved the problem by moving the OnEditPreferences() method to the document file with the Class Wizard. Sorry for any inconvenience.

Re: Communication between MainFrm and Document

Kiran Pinjala8-Aug-06 21:51

Kiran Pinjala

8-Aug-06 21:51

titaniumdecoy wrote:
I have tried GetActiveDocument()

This function returns ur active documents pointer as CDocument*. So u have to cast it to CYourDocument*.

titaniumdecoy wrote:
it does not seem to contain my custom data members

Then u can see it containing ur custom data members.

Smile | :)

KIRAN PINJARLA

POSTing to Multiple Http Forms

EpicYeti8-Aug-06 9:20

EpicYeti

8-Aug-06 9:20

I'm trying to create a program that will send information to several different forms on a webpage with one http request (i.e. posting to a message board with a subject line, message data, signature line etc...) I'm using wininet to do this, however I can't seem to get the right combinations of headers. I know i am going to use POST, but do I need to include a content-type header? and if so which one? Also, how do I need to actually format the data I am sending? Any help would be greatly appriciated.

Re: POSTing to Multiple Http Forms

led mike8-Aug-06 10:43

led mike

8-Aug-06 10:43

Yes to both your questions. You need to research the HTTP protocol.

epicyeti wrote:
but do I need to include a content-type header? and if so which one?

Like ApplicationXXX-UrlEncoded or some such odd thing. You also need content-length header if the wininet library does not create that for you... I can't recal if it does.

epicyeti wrote:
Also, how do I need to actually format the data I am sending?

Each variable is a name=value pair with the "value" UrlEncoded. Multiple variables are seperated by amperstand character.

hello=world&post=done

led mike

Where Can I find a tutorial for Programming for Windows Mobile 2003? [modified]

Coolarj108-Aug-06 8:47

Coolarj10

8-Aug-06 8:47

I have Visual C++ .NET 2003, and wanted to learn how to create basic applications (and games) for the windows mobile 2003 PocketPC operating system. (I actually wanted to learn for Windows Mobile 5.0, but don't have Visual Studio 2005).

Does anyone know where I can find any tutorials for this? I have very basic C++ programming knowledge.

Thanks in advance!! Smile | :)

-- modified at 14:47 Tuesday 8th August, 2006

Re: Where Can I find a tutorial for Programming for Windows Mobile 2003?

Coolarj108-Aug-06 10:33

Coolarj10

8-Aug-06 10:33

Well, I suppose I found the answer to my own question! If anyone else is wondering, the proper documentation is right here:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/guide_ppc/html/Dev_Guide_for_Windows_Mobile-Based_PocketPCs.asp Cool | :cool:

Re: Where Can I find a tutorial for Programming for Windows Mobile 2003? [modified]

Trollslayer8-Aug-06 11:41

Trollslayer

8-Aug-06 11:41

Good of you to post the answer, 5.

Oh - clickety police -
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/guide_ppc/html/Dev_Guide_for_Windows_Mobile-Based_PocketPCs.asp[^]

The tigress is here Big Grin | :-D

How to detect happening of file

Max++8-Aug-06 6:43

Max++

8-Aug-06 6:43

I have some tester and every time after it test,It will output the result in text file and keep it in the directory for example C:\Data.
I want to get the data of these file in real time for process some job.
My question is how I detect that now the file already happen and how to get the file name(if the file name is the barcode of each board).

Re: How to detect happening of file

David Crow8-Aug-06 6:59

David Crow

8-Aug-06 6:59

Are you wanting to monitor a folder for changes to a file? If so, check out ReadDirectoryChangesW() and/or FindFirstChangeNotification().

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Re: How to detect happening of file

Max++8-Aug-06 7:10

Max++

8-Aug-06 7:10

Can you give some example

Thankyou

Re: How to detect happening of file

bob169728-Aug-06 7:18

bob16972

8-Aug-06 7:18

search "fwatch sample" in MSDN from VS 6.0 (Not sure if it's in the following MSDN product lines)

Re: How to detect happening of file

David Crow8-Aug-06 7:24

David Crow

8-Aug-06 7:24

Max++ wrote:
Can you give some example

You could have Googled for it much quicker than posting another reply and waiting for a response.

http://www.google.com/search?hl=en&q=ReadDirectoryChangesW+OR+FindFirstChangeNotification[^]

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Re: How to detect happening of file

Eric Dahlvang8-Aug-06 10:12

Eric Dahlvang

8-Aug-06 10:12

MSDN code[^]

Just change the notification flags in the above example to reflect your heart's desire.

--EricDV Sig---------
Some problems are so complex that you have to be highly intelligent and well informed just to be undecided about them.
- Laurence J. Peters

Re: How to detect happening of file

Hamid_RT8-Aug-06 20:42

Hamid_RT

8-Aug-06 20:42

Seehere[^]if its good for you

WhiteSky

Knowing if a window is going to be visible at creation

Kharfax8-Aug-06 5:33

Kharfax

8-Aug-06 5:33

Hi people

I'm working with a windows hook, and I intercept WM_CREATE for all the windows.
I need to know if a window is going to be visible, I tried using IsWindowVisible(HWND) and checking WS_VISIBLE flag (wich are the same :S) and I always get false, because the window is not yet created.

Do someone knows how can I do to know if the window beign created is going to be visible?

Thanks in advance

Re: Knowing if a window is going to be visible at creation

led mike8-Aug-06 6:12

led mike

8-Aug-06 6:12

Did you look at the CREATESTRUCT in the LPARAM of the message?

led mike

Re: Knowing if a window is going to be visible at creation

Kharfax8-Aug-06 6:57

Kharfax

8-Aug-06 6:57