C / C++ / MFC

13-Oct-04 2:56

I have been trying to make a 2d array of pictureboxes but it seems like a can't figuer it out.
I have been trying to do like this but it does work.

PictureBox* Array2d[][]= new PictureBox* [][];

David Crow13-Oct-04 3:22

David Crow

13-Oct-04 3:22

This should create a 4x3 array of PictureBox objects:

PictureBox **pb = new PictureBox*[4];
for (int x = 0; x < 4; x++)
    pb[x] = new PictureBox[3];

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

K.A.L13-Oct-04 8:57

13-Oct-04 8:57

Then how would you acces them ?
and thanks

David Crow13-Oct-04 9:03

David Crow

13-Oct-04 9:03

Like any two-dimensional array:

pb[2][0] = ???;

would assign a value to the following "cell" of the array:

-------
| | | |
-------
| | | |
-------
|#| | |
-------
| | | |
-------

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

K.A.L14-Oct-04 3:58

14-Oct-04 3:58

great
thanks

Kevin McFarlane13-Oct-04 6:33

Kevin McFarlane

13-Oct-04 6:33

Avoid raw arrays. I would use CArray or vector, eg., (in your case substitute PictureBox for int)

// ***************************************
// Example: Dynamic Multidimensional Array
// ***************************************
// We want both array dimensions to be allocated dynamically and
// to be able to reference an element as x[i][j]
// Here's how to do it...
// ***********
// MFC Version
// ***********
// Array of ints
typedef CArray <int, int> CIntArray;
// Array of arrays of ints
typedef CArray <CIntArray, CIntArray&> CMultiIntArray;
void TraceDynamicArray(const unsigned int rows, const unsigned int columns)
{
CMultiIntArray aTest;

// Allocate number of rows
aTest.SetSize( rows );

// For each row
for (int row = 0; row < aTest.GetSize(); row++)
{
// Allocate number of columns
aTest[row].SetSize( columns );

// For each column
for (int column = 0; column < aTest[row].GetSize(); column++)
{
// Assign a value
aTest [row] [column] = 10 * row + column;

// Trace it
afxDump << aTest [row] [column] << "\t";
}
afxDump << "\n";
}
}
// ****************************
// Standard C++ Library Version
// ****************************
// Array of arrays of ints
typedef vector<vector<int> > CMultiIntArray;
void TraceDynamicArray(const unsigned int rows, const unsigned int columns)
{
CMultiIntArray aTest;
// Allocate number of rows
aTest.resize( rows );

// For each row
for (int row = 0; row < aTest.size(); row++)
{
// Allocate number of columns
aTest[row].resize( columns );

// For each column
for (int column = 0; column < aTest[row].size(); column++)
{
// Assign a value
aTest [row] [column] = 10 * row + column;

// Trace it
cout << aTest [row] [column] << "\t";
}
cout << "\n";
}
}
// Example usage: Standard C++ Library version
int main(int argc, char* argv[])
{
TraceDynamicArray(3,5);
return 0;
}
// For rows = 3, columns = 5, produces output...
// 0 1 2 3 4
// 10 11 12 13 14
// 20 21 22 23 24

Kevin

K.A.L13-Oct-04 9:01

13-Oct-04 9:01

"Avoid raw arrays. I would use CArray or vector."
Why?
I am kind of new in c++ and thanks.

Kevin McFarlane13-Oct-04 22:36

Kevin McFarlane

13-Oct-04 22:36

See http://www.artima.com/intv/goldilocks.html[^]

Basically, we should all be using the modern, high-level features of C++. They are safer, more robust, easier to use (after a bit of acquaintance) and often just as efficient as the low-level stuff.

Have a look at Stroustrup's comments and papers on this. See also Paul McKenzie's posts at codeguru.com.

Stroustrup: "The problem with the C way is that if you write code C-style, you get C-style problems. You will get buffer overflows. You will get pointer problems. And you will get hard to maintain code, because you're working at a very low level. So the cost is in development time and maintenance time."

Kevin

K.A.L14-Oct-04 3:57

Help ! hook java application by VC++

14-Oct-04 3:57

thanks

crazymanhehe13-Oct-04 1:32

crazymanhehe

13-Oct-04 1:32

i got a problem that i can't hook java application by VC++. So please give me documents or sample source code if you have this solution huh. Thanks for all. I'm waiting for all of you. Confused | :confused:

Creating Server application using CAsyncSocket

prasanna kankanalapalli13-Oct-04 0:52

prasanna kankanalapalli

13-Oct-04 0:52

I am creating a server application using CAsyncSocket , i am able to recieve information from a client , how could i send reply back to connected client , at present i am able to accept only one client how could i make it for multiple clients...

this is code that i had written...

here async is a class derived from CAsyncSocket....

void async::OnAccept(int nErrorCode)
{

if( recvsocket==NULL )
recvsocket = new async;
//Create the new connection
if( Accept( *recvsocket,NULL,NULL ) == 0 )
{
return;
}
CAsyncSocket::OnAccept(nErrorCode);
}

here i declared recvsocket as

async* recvsocket;

in the async class....

void async::OnReceive(int nErrorCode)
{

char *pBuf = new char[1025];
int iBufSize = 1024;
int iRecv, iErrCode;
CString strRecv, Emsg;

iRecv = Receive(pBuf,iBufSize);
if (iRecv == SOCKET_ERROR)
{
iErrCode = GetLastError();
Emsg = "Error found! Error code: " + iErrCode;
AfxMessageBox(Emsg);
}
else
{
pBuf[iRecv] = NULL;
strRecv = pBuf;
AfxMessageBox(strRecv);

/* if (recvsocket->Send(pBuf,iBufSize) == SOCKET_ERROR)
{

AfxMessageBox("Send Error");
}
else
{
AfxMessageBox("sended");
}
*/
}

CAsyncSocket::OnReceive(nErrorCode);
}

Thank u.

Prasanna

Interfacing with C# .net web service from C++ .net

Member 131514813-Oct-04 0:31

Member 1315148

13-Oct-04 0:31

I had to create a Win 32 dll in C++ to be able to link it to Clarion.
I usually use C# and don't know C++ very well.

This dll works fine but I am struggling to interface to my C# web service from this C++ dll.

I have added my Web service to the Project as a web reference.
In the dll I can see the web service name space but not the procedures in that service.

Is it possible top link from a C++ dll to a C# web service ?.. If possible How??

Thanks

Max

again IContextMenu

mazur197313-Oct-04 0:01

mazur1973

13-Oct-04 0:01

How get IContextMenu for several files from different folders ?

XZ

RealTime Priority?

Manikandan12-Oct-04 23:40

12-Oct-04 23:40

I wanna set real time priority to my application.

At first a loader program runs myapp. Then I want to get the process id using exe name. With exe name i must be able to set its priority to REALTIME.

My concept may sound correct but i dont know how to program it. Anybody can help me;P

Arsalan Malik13-Oct-04 2:07

Arsalan Malik

13-Oct-04 2:07

SetThreadPriority(...)[^] Smile | :)

ARSALAN MALIK

Antony M Kancidrowski13-Oct-04 2:33

Antony M Kancidrowski

13-Oct-04 2:33

If you have control over the loader program you can use CreateProcess() to launch your application and use REALTIME_PRIORITY_CLASS in the creation flag.

Otherwise use SetPriorityClass()within your application to REALTIME_PRIORITY_CLASS - this will ensure that your application runs at Realtime priority always.

I would be carefull when creating programs that run at realtime as they *will* hog the processor and you can easily prevent other applications from responding.

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 Williams (Little Britain)

Manikandan13-Oct-04 5:22

13-Oct-04 5:22

I tried...but it doesn't work. I am in VC6. Does this stuffs work under VC6? In the loader program i am using the below code,

STARTUPINFO suInfo;
PROCESS_INFORMATION procInfo;
CString m_Process;
m_Process.Format(_T("%s\\my.exe"),curDir);

memset (&suInfo, 0, sizeof(suInfo));
suInfo.cb = sizeof(suInfo);

::CreateProcess(m_Process,
NULL, // can also be NULL
NULL,
NULL,
FALSE,
REALTIME_PRIORITY_CLASS,
NULL,
NULL,
&suInfo,
&procInfo);

if (procInfo.dwThreadId == NULL)
{
AfxMessageBox("nope");
}
else
{
::SetThreadPriority(&procInfo.dwThreadId,THREAD_PRIORITY_HIGHEST);
}

When I check in process viewer the class priority is "Very High", the thread priority remain "normal". Also when a thread runs in "my.exe" it's not given the highest priorities, i am free to access other programs.

Antony M Kancidrowski13-Oct-04 5:33

Antony M Kancidrowski

13-Oct-04 5:33

Manikandan wrote:
i am free to access other programs

You will always be able to access other programs even with Realtime priority set.

NOTE: Running under windows you can not set the application to have exclusive use of the processor.

I am puzzled, why would you want to do this?

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 Williams (Little Britain)

Manikandan13-Oct-04 6:20

13-Oct-04 6:20

Hi Ant, my application is time sensitive. even mouse move will affect its normal operation. This is why i have to suspend other programs when my exe run a thread.

Actually i found a standalone program in the net that list out all the running programs (I give you the link asap). When i set the priority to real time (24). I found my program running fine while i cant even access the mouse.

But i want to do this programmatically.

Antony M Kancidrowski13-Oct-04 11:41

Antony M Kancidrowski

13-Oct-04 11:41

Manikandan wrote:
But i want to do this programmatically

I would have thought that my suggested launching would have worked. If I think of anything else you could try I will let you know.

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 Williams (Little Britain)

geo_m13-Oct-04 21:42

geo_m

13-Oct-04 21:42

Well, just a notice - Windows are not realtime OS, if you really need the RT features (for RT controlling a device or something like that) you better to go by some specialized RT OS or get some RT plugin for NT that replaces the standard scheduler.
Even if you set the process realtime priority and thread realtime priority the time scheduler can interrupt your process and will do it usually in the worsest possible time.

Manikandan13-Oct-04 21:51

13-Oct-04 21:51

hi thanks for you idea,

i did a google search with the string "Real Time plug in for NT" but i couldn't come across any windows compatible plug in's.

would you please refer me one Roll eyes | :rolleyes: