C / C++ / MFC Discussion Boards

James Bird19-Dec-01 6:24

19-Dec-01 6:24

I am using an fstream to keep a debug log (text based). It works fine except that it wipes the file and starts again whenever I reload the program. How do I make it move to the end of the file and continue writing. Heres the creation code if it is of any use:

fstream stream;
stream.open("c:\\system.log", ios::out);

Any help would be much appreciated,

James Bird
spider907@hotmail.com

James Bird - birdjames@bigfoot.com

Re: fstream problem

Joaquín M López Muñoz19-Dec-01 6:35

Joaquín M López Muñoz

19-Dec-01 6:35

Use ios::out|ios::app.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: fstream problem

James Bird19-Dec-01 7:47

James Bird

19-Dec-01 7:47

Thank you very much.

James Bird - birdjames@bigfoot.com

MSHTML Gurus - Question about get_onload() / put_onload()

Pierre Heler-Caruel19-Dec-01 6:09

Pierre Heler-Caruel

19-Dec-01 6:09

Hi guys,

One of the application I am working on at the moment needs to modify web-pages in order to insert custom OnLoad (or Window.OnLoad) Event-handlers.

My first shot was to do it solely by manually parsing the source of the web-page (i.e. load the HTML in memory and strtok() like mad... Wink | ;)

Although this works fine in most cases it is not satisfying as some pages use JavaScript to dynamically modify the <Body> of the Document and it becomes increasingly difficult to modify the actual <Body> Tag.

After reading about MSHTML I've figured this should be a more elegant way of doing it. Unfortunately, documentation is very poor on the subject and it is not as easy as I thought it would be...

Anyway, here's my problem:

I can get hold of the Body Tag as a pointer to a IHTMLBodyElement. I can then Call get_onload() with a VT_DISPATCH variable that receives (says MSDN) "the IDispatch interface of an object with a default method that is invoked when the event occurs"

That's great but what I want to do is
1) Check if this Event-handler is my custom script
2) If it's not, replace it by my custom Event-handler.

I guess, my first question is What type of Object is this (or what can I QueryInterface() to) ?

And of course, most importantly, can I change it ?

Thanks a lot in advance,

Cheers

Pierre Heler-Caruel

DateTime Picker control check box?

Giles19-Dec-01 5:38

Giles

19-Dec-01 5:38

Anyone know how to test if the checkbox in a datetime picker control on a dialog box is checked or not?

I tried something like :

if(m_dtpDelivered.IsDlgButtonChecked(0) == BST_UNCHECKED)

but I don't know the id of the checkbox, as the control owns it.

Thanks,

Giles

Re: DateTime Picker control check box?

Alvaro Mendez19-Dec-01 5:41

Alvaro Mendez

19-Dec-01 5:41

I don't have the answer, but I'd suggest using Spy++ to determine the ID of the checkbox if that's all you need.

Regards,
Alvaro

Re: DateTime Picker control check box?

Michael Dunn19-Dec-01 7:58

Michael Dunn

19-Dec-01 7:58

Use DTM_GETSYSTEMTIME. If it returns GDT_NONE, then the checkbox was unchecked.

--Mike--
My really out-of-date homepage
"Not our fault we are intellectually superior to the rest of the office." -- Paul Watson in the Lounge, 12/12/2001
Sonork - 100.10414 AcidHelm
Big fan of Alyson Hannigan.

Help with WinInet!!!

Ed K19-Dec-01 4:26

Ed K

19-Dec-01 4:26

Has anyone used wininet successfully to write large amounts of data...in my case...a servlet Frown | :(

I've used the following code...

CHttpConnection* pServer = NULL;
CHttpFile* pFile = NULL;

pServer = session.GetHttpConnection(szServerName, nPort);

CString strData = "data from a file to send to the server";

pFile = pServer->OpenRequest(CHttpConnection::HTTP_VERB_POST, szServletUrl);

pFile->SendRequestEx(strData.GetLength());
pFile->WriteString(strData);
pFile->EndRequest();

// need to get response...

I crash & burn on EndRequest()!

Thanks,

ed

'Love is an obsessive delusion that is cured by marriage.' Dr. Karl Bowman

Re: Help with WinInet!!!

Masaaki Onishi19-Dec-01 8:25

Masaaki Onishi

19-Dec-01 8:25

Hello, the codegurus around the world.;)

Maybe, directly using WinInet API is easier to write this kind of codes.

I think that you need whil loop (or do - while loop) to check the status
of pFile->SendRequestEx(strData.GetLength()), maybe.

This is mainly because WinInet uses Syncrous(?) - like the blocking socket -
and the result of pFile->SendRequestEx(...) will not come back soon.
But, if we use Asnyrous WinInet, we get the result soon.

You also need the error checking for the main function.

Please, don't send me your email about your questions directly.
Have a nice day!
Sonork - 100.10571:vcdeveloper Wink | ;)

-Masaaki Onishi-

Re: Help with WinInet!!!

Ed K19-Dec-01 9:34

Ed K

19-Dec-01 9:34

Masaaki Onishi wrote:
directly using WinInet API is easier to write this kind of codes

I found a few examples on msdn after posting this. It appears that you are correct. Also looping on write may help. After going through this and seeing the numerous other questions posted that weren't answered, I may have to abstract this out and post an article.

Thanks,

ed

'Love is an obsessive delusion that is cured by marriage.' Dr. Karl Bowman

3D programming

Rajveer19-Dec-01 4:22

Rajveer

19-Dec-01 4:22

Name a few books and good websites to learn 3D programming in visual C++

Re: 3D programming

Kuniva19-Dec-01 5:43

Kuniva

19-Dec-01 5:43

It depends on which API you want to use:

if you want to use OpenGL: http://nehe.gamedev.net
book: OpenGL game programming

if you're gonna use DirectX: http://nexe.gamedev.net
i dunno any book

or r ye gonna program 3d without an API? hey anythings possible....

Kuniva

Help needed

19-Dec-01 3:09

Hello expert C++ programmers...

I am not an expert anymore.. Frown | :(

(or have I ever been?)

Well I program java now, but I need to do a program in C++
I have the stupidest question. I want to know how to make an array, and I have forgotten how. Could anyone plz show me.

I want to declare an array of character arrays.

char myArray[xx][xx];

but... I want to do it dynamically

something like: char myArray** = new char[xx][xx];

but that didnt work, and i cannot figure out how to do it. who better to ask than experts!?

Re: Help needed

Rickard Andersson²⁰19-Dec-01 3:21

Rickard Andersson²⁰

19-Dec-01 3:21

Tror du är från sverige va?? Smile | :)

Du gör så här:

// deklarera en variabel dynamiskt så här:

char* myArray = new char[4]; // 4 eller så många du vill

// sedan töm minnet

delete [] myArray;

If you didn't was a SWEDISH guy:

Declare an array dyn like this:

char* myArray = new char[4]; // 4 or how many elements you want

and then free it like this:

delete[] myArray;

------------------------------
©0d3 ©®4©k3® - That's me! Smile | :)

------------------------------

Re: Help needed

19-Dec-01 3:52

Rickard Andersson wrote:
Declare an array dyn like this:

char* myArray = new char[4]; // 4 or how many elements you want

and then free it like this:

delete[] myArray;

Yes, I am swedish Wink | ;)

That array is no problem to declare. The problem I have is to dynamically delcare and array of arrays. That means I want to declare an array of pointers to a array-pointer.

Declared NOT DYNAMIC, char myArray[10][20];

This will get me an array with 10 arrays each 20 long. The question is how to do it with the new operator.

>> char* myArray = new char[4]; // 4 or how many elements you want

you can declare this char myArray[4];
or char myArray[] = " ";

I am not interested in a singel array of whatever. A twodimensional array dynamically declared.

I hope I have clarified a bit Smile | :)

Happy Christmas, and thanks for your help

// Robert

Re: Help needed

Nish Nishant19-Dec-01 17:26

Nish Nishant

19-Dec-01 17:26

char **a = new char*[20];<br><br />
for(i=0;i<=19;i++)<br />
    a[i]= new char[10];

Nish

Sonork ID 100.9786 voidmain
www.busterboy.org
If you don't find me on CP, I'll be at Bob's HungOut

Re: Help needed

Kuniva19-Dec-01 3:22

Kuniva

19-Dec-01 3:22

suckup

weeeeeeeeeeeeeeeeeeeeeeeeeeeeeee lol i'm just crazy, i didn't mean that, i just had to say that, it sounded funny in my head! sorry to've wasted your time i wouldn't know how to do it either!

Kuniva

Re: Help needed

Alvaro Mendez19-Dec-01 5:49

Alvaro Mendez

19-Dec-01 5:49

Here's how:

int X = some_calculated_number();
int Y = some_other_calculated_number();
 
// Create the array of pointers to characters
char** myArray = new char*[X];
 
// Loop through each element and assign each new array individually
for (int i = 0; i < X; i++)
    myArray[i] = new char[Y];

Regards,
Alvaro

Re: Help needed

19-Dec-01 6:24

Thank you,

// Robert

getting a file's last accessed/modified time

Kuniva19-Dec-01 2:32

Kuniva

19-Dec-01 2:32

I need to get the time a certain file was last modified/accessed.

I'm guessing i can use CFileFind for this?

CFileFind::GetLastAccessTime(&CTime) ????

how do i use it? how do i set the filename???
+ i need to get the time in a CString

CFileFind.Format(blablabla) ???

Anyone know this?

Thanks

Kuniva

Re: getting a file's last accessed/modified time

Ravi Bhavnani19-Dec-01 2:56

Ravi Bhavnani

19-Dec-01 2:56

Use CFile::GetStatus().

/ravi

"There is always one more bug..."
http://www.ravib.com
ravib@ravib.com

Re: getting a file's last accessed/modified time

Kuniva19-Dec-01 3:20

Kuniva

19-Dec-01 3:20

woohoo it works!! thanks!

Kuniva

Process

Praba19-Dec-01 1:46

Praba

19-Dec-01 1:46

How can I determine from within of my programm wether the particular process is running or not in my system when I know only name of exe file? Confused | :confused:

Re: Process

Ravi Bhavnani19-Dec-01 8:22

Ravi Bhavnani

19-Dec-01 8:22

Perhaps you could enumerate all processes using EnumProcesses() and inspect their filenames using GetModuleFileNameEx(). /ravi "There is always one more bug..." ravib@ravib.com http://www.ravib.com

Re: Process

Ravi Bhavnani19-Dec-01 11:28

Ravi Bhavnani

19-Dec-01 11:28

See http://www.codeproject.com/threads/enumprocess.asp.

/ravi

"There is always one more bug..."
ravib@ravib.com
http://www.ravib.com

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