C / C++ / MFC

Re: the data in the file is:

29-Aug-05 2:41

great !

TOXCCT >>> GEII power
[toxcct][VisualCalc]

-- modified at 8:41 Monday 29th August, 2005

Jörgen Sigvardsson29-Aug-05 11:03

Jörgen Sigvardsson

29-Aug-05 11:03

He's hardcore! Smile | :)

Good music: In my rosary[^]

Re: who can tell me what fomat the audio file *.ssu is.

Cedric Moonen29-Aug-05 3:03

Cedric Moonen

29-Aug-05 3:03

Maybe here[^]

Thread problems...

Lefteris_RG312029-Aug-05 2:21

Lefteris_RG3120

29-Aug-05 2:21

Hello guys!I've been coding MFC apps for 3 months now,and i recently encountered the situation below:

I have a Dialog window (class CControlPanelDlg) and a picture control object called m_pcTest(of type CStatic).I have created a structure called "Bitmap" that contains the following array : CBitmap Icon[4].I've created 4 bitmap images and loaded them into Icon(Using LoadBitmap(IDB_IMAGE_ID) method).I want to change the image that m_pcTest shows each time i click a Button within the window(using m_pcTest.SetBitmap(Bitmap.Icon[0])).So far so good.The image changes.Then i created a thread,that it's thread function calls another function located inside CControlPanelDlg.cpp,the same function i use to change the image shown in m_pcTest every once i click the button.While in Debug mode,i noticed that when the program jumps inside the function that change images (m_pcTest.SetBitmap(Bitmap.Icon[0])),the variable m_pcTest has the following value:
m_pcTest={CStatic hWnd=???}. When the program passes the line that contains the breakpoint,it throws a nasty Access Violation!I tried calling tha function from within the thread function with different ways,like:

((CControlPanelDlg*)AfxGetApp()->m_pActiveWnd)->ChangeImage();
p_ControlPanelDlg ->ChangeImage();

(p_ControlPanelDlg ---> external pointer to CControlPanelDlg dialog class)

The variable m_pcTest is public.Am i doing something wrong?Did i forget to declare something?Or i declared it in the wrong way?Please help.I know i'm new to MFC,and you probably going to ask yourself "why this young lad bothers himself with threads so early"? The answer is i'm in love with MFC and i've learned so much within those 3 months(mostly Serial Communication,Database projects) and i needed to learn how to change bitmaps while other code was executing.I tried to do this with timers but as long as my code enters a loop,ChangeImage()could not be called until code execution continued beyond the loop.I tried UpdateData(FALSE)from inside the loop,but nothing happend.So i needed a co-process,a thread.I would appreciate it if someone of you code gurus out there could help.Thank GOD that "The Code Project" exists as my homepage...

Lefteris_RG3120
Control Systems & Software Engineer

-- modified at 8:23 Monday 29th August, 2005

Re: Thread problems...

Jose Lamas Rios29-Aug-05 3:06

Jose Lamas Rios

29-Aug-05 3:06

Instead of directly calling ChangeImage from your worker thread, you need to make the CDialog's m_hWnd available to the thread (when you create it) and then use it to post a private message from the worker thread back to the dialog. Use a handler for that message in the CDialog to call ChangeImage.

Hope that helps,

--
jlr
http://jlamas.blogspot.com/[^]

Simple Question (sorry 4 the trouble again) :)

Eytukan29-Aug-05 2:16

Eytukan

29-Aug-05 2:16

char v1[12]= "CodeProject";
char v2[5];

strncpy(v2,v1,sizeof(v2));

AfxMessageBox(v2);

Now what will u get, don't test it in ur IDE.. just hav a luk n tell..
answer this , i'll tell u what i actually need..

Thanks n regards,
V

Re: Simple Question (sorry 4 the trouble again) :) [EDITED]

toxcct29-Aug-05 2:22

29-Aug-05 2:22

here again, i see you don't take care to the trailing null character...

you should have written

strncpy(v2, v1, sizeof(v2)-1);
v2[sizeof(v2) - 1] = '\0';

this way, it will display Code

the other way to use strcpy() and strncpy() properly is to use pure pointers variables :

char v[12] = "CodeProject";
char* pc = NULL;
strcpy(pc, v);

TOXCCT >>> GEII power
[toxcct][VisualCalc]

-- modified at 8:36 Monday 29th August, 2005

Achim Klein29-Aug-05 2:35

Achim Klein

29-Aug-05 2:35

I guess, you meant v2[sizeof(v2) - 1] = '\0'; ?

We can do no great things, only small things with great love. - Mother Theresa

toxcct29-Aug-05 2:37

Re: Simple Question (sorry 4 the trouble again) :) [EDITED]

29-Aug-05 2:37

yes, sorry for the mistake...

it's fixed now

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Eytukan29-Aug-05 2:49

Eytukan

29-Aug-05 2:49

thatz nice tox.. thank u so much
Cool | :cool:

thanx,
V

Re: Simple Question (sorry 4 the trouble again) :) [EDITED]

Bob Stanneveld29-Aug-05 4:06

Bob Stanneveld

29-Aug-05 4:06

toxcct wrote:

char v[12] = "CodeProject";<br /> char* pc = NULL;<br /> strcpy(pc, v);

Doesn't this lead to a runtime error? Here you try to copy string v to the address NULL...

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

Achim Klein29-Aug-05 2:31

Achim Klein

29-Aug-05 2:31

To get "Code" you need a terminating NULL:

char v1[12]= "CodeProject";
char v2[5];

strncpy(v2, v1, sizeof(v2) - 1);

v2[sizeof(v2) - 1] = 0;

Regards

We can do no great things, only small things with great love. - Mother Theresa

Eytukan29-Aug-05 2:49

Eytukan

29-Aug-05 2:49

thankx buddy Smile | :)

proxy settings

Member 217784029-Aug-05 1:43

Member 2177840

29-Aug-05 1:43

Hello,

I try to write a program that uses http tunneling. But behind a proxy it won't work. Of course i can get the proxy settings from registry but the username and passowrd aren't stored, so if i want to connect i need to know the username and password. How can i get them?
One more information: the program is in vc++ and the iexplorer must start before it. So the user is authenticated.

Robi75

Re: proxy settings

toxcct29-Aug-05 2:00

29-Aug-05 2:00

your program will have to ask for those 2 infos to the user to store them... (that's what happens for example when you configure other programs for a proxy connection...

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: proxy settings

Member 217784029-Aug-05 21:47

Member 2177840

29-Aug-05 21:47

Thanks, I thought its possible to get the username and pass somehow at code level but I came to the conclusion that it is impossible after reading related topics on the net.

Thanks anyway,
Rob

preview problems

mikobi29-Aug-05 1:23

29-Aug-05 1:23

I am using DOC/View facilities.

1. When a make a preview, there is not a preview toolbar; i don't found a mean to print from there, What to do ?

2. When i close my preview windows, the program is broken down, why ? and what to do ?

I learn my self

preview problems

mikobi29-Aug-05 1:15

29-Aug-05 1:15

I am using Doc/View facilities,

1. When make preview, there is not a preview toolbar where i can print,etc.. . What to do ?

2. When I close my preview windows my program broken down, Why ?

I learn my self

Member 214363829-Aug-05 4:20

Member 2143638

29-Aug-05 4:20

Please, Write How you are using Preview?
And How you close Preview if there is no toolbar?

mikobi29-Aug-05 19:37

29-Aug-05 19:37

From ClassWizard, I generate my OnFilePrint PreView fonction like below. When i am in this view like i am using DOc/View facility, i clic File/printpreview menu, the preview screen is shown but without preview boxes and when i close, the program broken down
void impression::OnFilePrintPreview()
{
// TODO: Add your command handler code here
CFormView::OnFilePrintPreview();

}

Member 214363829-Aug-05 21:26

Member 2143638

29-Aug-05 21:26

So I had some problems like yours.
Try to invoke DoPrintPreview in your OnFilePrintPreview.

mikobi31-Aug-05 0:25