Managed C++/CLI

What's the meaning of ^ in VS2005.NET???

11-Jul-07 0:42

bloodwinner wrote:
I am using C

Then you can't be using .NET and you're in the wrong forum. Try the visual C++ forum.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Ming Luo10-Jul-07 7:30

Ming Luo

10-Jul-07 7:30

Hi all:
I am really confused about the meaning of ^ in VS2005. I see many programs declared as something like:
String^ xxx;
MyClass^ yyy;

Can anyone explain it to me please?

Thanks very much!!!

Asura

Asura

Re: What's the meaning of ^ in VS2005.NET???

Giorgi Dalakishvili10-Jul-07 8:10

Giorgi Dalakishvili

10-Jul-07 8:10

Why don't you have a look at MSDN?

#region signature
my articles
#endregion

Re: What's the meaning of ^ in VS2005.NET???

Ming Luo10-Jul-07 8:12

Ming Luo

10-Jul-07 8:12

Because I didn't find it.

Asura

Re: What's the meaning of ^ in VS2005.NET???

iddqd51510-Jul-07 8:37

iddqd515

10-Jul-07 8:37

Its called a handle. Its a form of tracking pointer. The garbage collector updates the location a handle points to if it moves the data it pointed to during compaction of the managed heap.

declaration classe and methodes c++ cli

abbd10-Jul-07 6:13

abbd

10-Jul-07 6:13

Hi,
I would declared classe and methodes using .h and .cpp , he can't introduce a variables declared in .h
please help me

the .h was

#pragma once
#include "inc.h"

class abbdCap
{public:
abbdCap(void);
~abbdCap(void);
public:
int GetDeviceList();
int OpenDevice(int index);
int CloseDevice();
int ApplyFilter(int index);
u_long netmask;
int devcount;
int res;

};

the .cpp was:

#include "StdAfx.h"
#include ".\capturingpaquet.h"
using namespace System;
abbdCap(void)
{
int i;
alldevs = new pcap_if_t;

}

~abbdCap(void)
{
pcap_freealldevs(alldevs);
}
int GetDeviceList()
{
int j;
int k;
.
.
.
.
}

thank you

how to keep on this program executing when I put it at the backgound?

bloodwinner9-Jul-07 23:20

bloodwinner

9-Jul-07 23:20

the scenario is I am counting down 5, if no 'y' has been input during this time, then it ends at one way, else it ends at another way. Because I dont expect there must be a 'y' input, I write this as multi-thread, one for counting down, one for checking the 'y' input (could be unnecessary).

this program works fine when I put it at the foreground(using linux), but when put it at background, error happens, it will stop and wait for getchar() input, and m doesnot count down. As long as I use shell command "fg" to bring it back to foreground, the count down resumes, but that is not what I want.

what I want is just: put the program execution at background, while waiting for a 'y' input during 5 seconds count down time.

void *countdown(  );<br />
void *waitinput(  );<br />
static int m=5;<br />
static int k=1;<br />
<br />
int main(int argc, char **argv)<br />
{ 	<br />
<br />
	pthread_t thread1=0, thread2=0;<br />
	int  iret1=0, iret2=0;<br />
	<br />
    /* Create independent threads each of which will execute function */<br />
<br />
     iret1 = pthread_create( &thread1, NULL, countdown, NULL);<br />
     iret2 = pthread_create( &thread2, NULL, waitinput, NULL);<br />
<br />
     /* Wait till threads are complete before main continues. Unless we  */<br />
     /* wait we run the risk of executing an exit which will terminate   */<br />
     /* the process and all threads before the threads have completed.   */<br />
<br />
     pthread_join( thread1, NULL);<br />
//   pthread_join( thread2, NULL); <br />
	     <br />
     pthread_cancel(thread1);<br />
     pthread_cancel(thread2);<br />
     printf("pthread been cancelled\n\n");<br />
<br />
     if(k=1){...}<br />
     else {...}<br />
 <br />
     <br />
     return 0;<br />
}<br />
<br />
void *countdown()<br />
{<br />
     while(m>0)<br />
     {<br />
     	printf("%d seconds left\n",m--);<br />
     	sleep(1);<br />
        printf("m is %d\n",m);<br />
     }<br />
<br />
}<br />
<br />
void *waitinput()<br />
{<br />
     char c='n';<br />
     while(m)  <br />
     {<br />
     	if((c=getchar())=='y')<br />
     	{<br />
     	    printf("congratulations. you entered y\n");<br />
     	    sleep(1);<br />
     	    m=0;k=0;<br />
    	}<br />
     	else ;<br />
     }<br />
}

Re: how to keep on this program executing when I put it at the backgound?

Christian Graus10-Jul-07 1:35

Re: Matlab/C communication

10-Jul-07 1:35

This is the C++/CLI forum. .NET threads are much easier, if you're using C++/CLI, use those. Otherwise, try the Visual C++ forum.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Matlab/C communication

gregdachs9-Jul-07 15:09

gregdachs

9-Jul-07 15:09

Hello all

I have a C program that basically functions as a control loop for a DC motor. Right now, the program is two threads, one that forms a user interface where I can change parameters, and the other runs a loop to update the command to the motor. Parameters are stored in global variables accessable to both threads.

I would like now to make MATLAB able to modify these global variables or otherwise communicate with the control loop thread. Does anyone have an idea of how to open a communication channel like this? The first thing that came to my mind was just using a simple UDP socket, but I lack the proper toolbox to implement that.

Thanks in advance,
Greg

Christian Graus9-Jul-07 15:14

Re: Keyboard send Message

9-Jul-07 15:14

Your program is in C. C is not OO. There is no such thing as C/CLI. You are in the C++/CLI forum, for MANAGED C++ questions.

Try the visual C++ forum.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Keyboard send Message

WonYG9-Jul-07 14:43

WonYG

9-Jul-07 14:43

LRESULT OnTest(HWND hMetin, WPARAM wParam, LPARAM lParam)
{
hMetin = FindWindow(NULL, "metin");
Sleep(5000);
//Mouse move
SetCursorPos(100, 200);
Sleep(500);
mouse_event(MOUSEEVENTF_LEFTDOWN, 0, 0, 0, GetMessageExtraInfo());
Sleep(500);
mouse_event(MOUSEEVENTF_LEFTUP, 0, 0, 0, GetMessageExtraInfo());
Sleep(500);

//This code is Keybd source of send Message
SendMessage(hMetin, WM_CHAR, 'd', 0); Sleep(100);

SendMessage(hMetin, WM_KEYDOWN, 'd', 0); Sleep(100);
SendMessage(hMetin, WM_KEYUP, 'd', 0); Sleep(100);

SendMessage(hMetin, WM_KEYDOWN, 'd', 0); Sleep(100);
SendMessage(hMetin, WM_CHAR, 'd', 0); Sleep(100);
SendMessage(hMetin, WM_KEYUP, 'd', 0); Sleep(100);

return 0;
}

------
Hi..
I am working Macro-Program of a online game.all function is success,but keymessage can't.But Text type is possible.In the online game is impossible to send the keyboard message.It maybe different the keymessage that send a device
and C++.
Ah..and To work the Network game,It's very a difficult problem.
Thanks in advance

and Now i am living in Korea ^^

Hi..
I like a C++

Christian Graus9-Jul-07 15:36

Re: Keyboard send Message

9-Jul-07 15:36

Doesn't look like C++/CLI to me....

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Hamid_RT10-Jul-07 9:09

Hamid_RT

10-Jul-07 9:09

It seems that your code isnt C++/CLI maybe better you ask on the Visual C++.;)

WhiteSky

CxImage library

Bieras9-Jul-07 7:50

Bieras

9-Jul-07 7:50

Hi!
My problem is how to properly create and load a static library of CxImage.
I work with Borland C++ Builder 6.
I think I don't fully understand instruction connected with files I've downloaded from www.xdp.it .
This is the first time I'm working with DLL libraries so I'm very confused Unsure | :~

I would be very grateful for any assistance Smile | :)

Bieras

Re: CxImage library

Mark Salsbery9-Jul-07 8:51

9-Jul-07 8:51

This doesn't look like a managed C++ question so you should post it on the Visual C++/MFC board.

I took a look at the site - It appears to be a c++ library so the author probably includes
header file(s) to use in your source code and lib file(s) to link with your project.

The author also appears to be a CPian, so if you go to the article(s) that he wrote about the
library, you can leave a message for him directly. See here[^] for an example.

Mark

Mark Salsbery
Microsoft MVP - Visual C++

This episode brought to you by the letter Z

Re: CxImage library

Bieras9-Jul-07 10:59

Bieras

9-Jul-07 10:59

Thank you for answer Mark Smile | :)

,
but that was not exactly what I asked about. I have already read this article, but I don't understand if I have to Built given .cpp files one by one and then add them to my project or make one library file? And one more. Should I built all the files in the library or only that which contains information of the kind of

// To add a file to the library use the Project menu 'Add to Project'
and with header
#define Library
at the end ?

Bieras

PS. Sorry for my poor English, and for my questions but I'm just the beginner in that kind of programming. Smile | :)

Re: CxImage library

Mark Salsbery9-Jul-07 11:10

What's the equivalent to C# static classes?

9-Jul-07 11:10

There's a section in the article I linked to that explains it better than I ever could (I didn't write the library Smile | :)

) - "Using CxImage in your projects".

It looks like you need to build the libraries (with the supplied workspace/projects) and then
link to the resulting libraries.

Mark

Mark Salsbery
Microsoft MVP - Visual C++

This episode brought to you by the letter Z

mid=57417-Jul-07 6:36

mid=5741

7-Jul-07 6:36

Is it possible to define static classes as in C#? If not, is the following sufficient:

public ref class MyStaticClass
{
public:

   /* a bunch of static methods */

private:

   MyStaticClass() {};
   ~MyStaticClass() {};
   MyStaticClass( const MyStaticClass% ) {};
};

If I enable code analysis, I get warnings on the copy constructor and the destructor:

warning: CA1811 : Microsoft.Performance : 'MyStaticClass.MyStaticClass(MyStaticClass)' appears to have no upstream public or protected callers.
warning: CA1801 : Microsoft.Usage : Parameter '' of MyStaticClass.MyStaticClass(MyStaticClass) is never used. Remove the parameter or use it in the method body.
warning: CA1822 : Microsoft.Performance : The 'this' parameter (or 'Me' in VB) of MyStaticClass.~MyStaticClass():Void is never used. Mark the member as static (or Shared in VB) or use 'this'/'Me' in the method body or at least one property accessor, if appropriate.

Mark Salsbery7-Jul-07 7:27

7-Jul-07 7:27

You can't declare the class static but yes, static methods and member variables will give the
same behavior.

Mark

Mark Salsbery
Microsoft MVP - Visual C++

This episode brought to you by the letter N

mid=57417-Jul-07 7:34

mid=5741

7-Jul-07 7:34

I also want to ensure that MyStaticClass cannot be instantiated. Do you think I should make the class sealed in addition to what I've listed above? And do I need to worry about operator=()?

Mark Salsbery7-Jul-07 8:04

7-Jul-07 8:04

sealed is good to ensure no derived classes.

Off the top of my head, I'd say just having a private default constructor is sufficient.
Without being able to instantiate any objects of the class, the destructor, assignment operator,
and copy constructor are irrelevant.

If, after some more caffeine, I change my mind about that, I'll let you know Smile | :)

Mark

This episode brought to you by the letter N

mid=57417-Jul-07 8:08

mid=5741

7-Jul-07 8:08

OK. Thanks for the input. This is what I'm going with:

public ref class MyStaticClass sealed
{
public:

   /* a bunch of static properties and methods */

private:

   MyStaticClass() {};
};

Mark Salsbery7-Jul-07 9:07