Re: Socket Programming - C / C++ / MFC Discussion Boards

Re: What's wrong....

Astricks12-Jan-07 0:04

Astricks

12-Jan-07 0:04

Thanks

Re: What's wrong....

neilsolent11-Jan-07 2:12

neilsolent

11-Jan-07 2:12

In these lines:

if (j-1 > 0 && i+1 <=5 )
{ if (A[i][j] < A[i+1][j-])

"i" can be as large as 4. Which means elements A[5][j] are being accessed - but the declaration was int A[5][5] - i.e. the maximum element is A[4][j]

So array out of bounds ..

cheers,
Neil

Socket Programming

SrikanthVinayak Ram11-Jan-07 1:48

SrikanthVinayak Ram

11-Jan-07 1:48

Hi Jobin,

I have created a simple example to simulate TCP using MFC CSocket. The purpose of the code is Server Listens at port number 6000. Once client gets connects to 6000, client sends a message to Server and the server should display the received message. The server code is running correctly in the Application generated by AppWizardExe (include windows sockets check box Yes)but not at console based program.

The code is as follows

s.Create (6000);
s.Listen ();
s.Accept (t);
n = t.Receive ((void*)l,20);
l[n] = 0;
cout<

Re: Socket Programming

Mark Salsbery11-Jan-07 5:13

Mark Salsbery

11-Jan-07 5:13

The problem is using MFC in a console application. By default, the MFC socket classes need a
window to process socket events. You could get it to work with the proper MFC initialization in a console app but I'm not sure it's worth the trouble unless you're using other MFC classes.

You could try using direct calls to WinSock instead of using the MFC classes.

If you must use MFC then can you post the code used to initialize MFC?

Mark

Re: Socket Programming

David Leyva11-Jan-07 10:31

David Leyva

11-Jan-07 10:31

Hi
I think your code have to work. Only a question, Have you create the console app with MFC options?

David Leyva

Re: Socket Programming

SrikanthVinayak Ram11-Jan-07 18:40

SrikanthVinayak Ram

11-Jan-07 18:40

Clarification for David's question - Have you create the console app with MFC options?

MFC options mean In the preferences I set the option "Use MFC as a shared DLL". Is that you mean or some thing else? Alse the variable s is of type CSocket. Other than the above mentioned code I did not write any thing extra (Except declarations). l is a character array of size 20 and n is an int type. s,t are variables of type CSocket.

For Mark:
---------
I did not write any code related to MFC initialization. Please tell me what is that code to initialize MFC in a console based application. Also, Please mail me how to attach my code to a window in a console based application without that window to be displayed. I did not understand the statement "MFC socket classes need a window to process socket events". Did not understand means How to simulate that is thing I did not understand.

Srikanth K

Re: Socket Programming

Mark Salsbery12-Jan-07 6:37

Mark Salsbery

12-Jan-07 6:37

Does your app have a main() function or WinMain()?

If so, get rid of that and set the programs entry point (in linker options) to
wWinMainCRTStartup.

If you are using MFC then MFC handles the entry point for you and initializes itself.

As with any normal MFC app you'll need ONE global static object of a class dervived from CWinApp.
Override InitInstance() in this class and perform initialization there, including initializing
Windows Sockets with WSAStartup(). You don't need to create a main window for the app since it's
a console app.

Re: Socket Programming

Mark Salsbery12-Jan-07 6:39

Mark Salsbery

12-Jan-07 6:39

Hi Srikanth,

Also make sure you hit reply on my messages if you want me to see your replies.
It was just by chance I looked this far into old messages and saw that you had replied Smile | :)

Mark

CDateTimeCtrl ideal size

Watz11-Jan-07 1:02

Watz

11-Jan-07 1:02

Hi,

does anyone know a trick how to get the ideal size for the CDateTimeCtrl to display all of its content in all formats it supports?

It doesn't resize itself to a proper size for its content and it seems it has alot of internal logic for sizing the various internal edit fields.

A simple GetWindowText() and GetOutputTextExent() doesn't work in all cases (i.e. when there are date/time formats set without leading zeros).

I know there is a special window message available on vista to fetch the ideal size of the CDateTimeCtrl, but what to do in previous windows versions ?

Many thanks,
Watz

Simplest way to display data in table form

ldsdbomber11-Jan-07 0:33

ldsdbomber

11-Jan-07 0:33

You see, I'm not sure I really need a fully featured tabular control. I'm doing a fairly simple dialog based application using the AppWizard in VC++, which will load some ascii text files and display them in a table format. At some point in the future RS232 will read in new values but for now, it will be a case of editing a few edit controls and clicking a button to "push" a line of data into the table, comparing and doing some calculations on the way. I don't see that there'll be much need for the users to interact with the table other than I'd like at some point to be able to push that out to a print option

Is there an easy way to do this? I probably only need pointing in the right direction to start with.

t.i.a
Lee

Re: Simplest way to display data in table form

Rage11-Jan-07 1:17

Rage

11-Jan-07 1:17

Use a CListCtrl ?

Re: Simplest way to display data in table form

ldsdbomber11-Jan-07 1:38

ldsdbomber

11-Jan-07 1:38

thanks. I've not done a lot with VC++ for a while, and didn't correlate "List control" with "tabular data" when I saw that in the controls palette

How to add rich edit control ??

Suresh H11-Jan-07 0:10

Suresh H

11-Jan-07 0:10

Hello All,

I added a Rich Edit Box to my dialog and executed the dialog now the problem is dialog is not getting displayed & no action is performed or any error is displaed.

Guys can u please tell me hw to add a Rich Edit Control to my Dialog using Win32 App. ???

Thanking you,
Suresh HC

Re: How to add rich edit control ??

prasad_som11-Jan-07 0:25

prasad_som

11-Jan-07 0:25

You need to call AfxInitRichEdit to initialize rich edit control for app.
Call this function in your application.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: How to add rich edit control ??

Suresh H11-Jan-07 0:45

Suresh H

11-Jan-07 0:45

Hi Prasad,

Thansk for the responce.

I called AfxInitRichEdit(); in my Dialog,
I am getting error C2065: 'AfxInitRichEdit' : undeclared identifier

Dialog which I have created is from win32 Application and not from MFC.

Can u please tell me hw use rich edit box in win 32 application.

Re: How to add rich edit control ??

prasad_som11-Jan-07 1:08

prasad_som

11-Jan-07 1:08

Use LoadLibrary for initializing rich edit control.
You main window procedure would look like this,

LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
     switch(Message)
	 {
	 case WM_CREATE:
		  hLib = LoadLibrary("RICHED32.DLL");
                  break;   
         case WM_CLOSE:
		  DestroyWindow(hwnd);
		  FreeLibrary(hLib);
        	  break;
          ..

}

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: How to add rich edit control ??

Suresh H11-Jan-07 1:22

Suresh H

11-Jan-07 1:22

Hi Prasad,

what shd be the hlib variable type ??? and where we have to declare that variable??

error C2065: 'hLib' : undeclared identifier

Re: How to add rich edit control ??

prasad_som11-Jan-07 1:26

prasad_som

11-Jan-07 1:26

Its HMODULE. You can declare it as

HMODULE hLib;//of course you can decide how you want to manage it

I've just given example.
Only thing important, you need to load dll before invoking dialog.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: How to add rich edit control ??

Suresh H11-Jan-07 1:43

Suresh H

11-Jan-07 1:43

Hi Prasad,

I did changes as u have mentioned.

But still no changes , still the dialog is not getting displayed which contains rich edit box.If i remove the Rich edit control Dialog is getting displayed.

I have 3 dialogs one main another sub dialogs , in the sub dialog I have the rich edit control.

The main MainDlgProc

<br />
BOOL CALLBACK MainDlgProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)<br />
{<br />
	HMODULE hLib;<br />
	switch(Message)<br />
	{<br />
<br />
		case WM_CREATE:<br />
		  hLib = LoadLibrary("RICHED32.DLL");<br />
            break;

and the sub dialog DlgProc

<br />
BOOL CALLBACK SearchDlgProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)<br />
{<br />
	HMODULE hLib;<br />
	switch(Message)<br />
	{<br />
		case WM_CREATE:<br />
		  hLib = LoadLibrary("RICHED32.DLL");<br />
            break;   <br />

I am using windows 2000 OS with VC6.

Re: How to add rich edit control ??

prasad_som11-Jan-07 1:55

prasad_som

11-Jan-07 1:55

Dear ! dear !
I mentioned in earlier reply, you need to load library before invoking dilaog. I'd assumed , you main application window is not dialog window in question, and window procedure I mentioned is of main window. So use given procedure with main window.
You should get idea from this snippet,

 hLib = LoadLibrary("RICHED32.DLL");
 ret = DialogBox(GetModuleHandle(NULL), 
  MAKEINTRESOURCE(IDD_MYDLG), hwnd, MyDlgProc);
  if(ret == -1)
  {
     MessageBox(hwnd, "Dialog failed!", "Error",
						MB_OK | MB_ICONINFORMATION);
   }
FreeLibrary(hLib );

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: How to add rich edit control ??

Suresh H11-Jan-07 2:02

Suresh H

11-Jan-07 2:02

At last ………Its working ……

Thanks a lot Prasad …. I actually adding the dll file load in DlgProc after dialog load that my mistake which I did … now I have added in the WinMain ..now the dialog is getting displayed with the rich control.

Thanks a lot Prasad once again …

Re: How to add rich edit control ??

Hamid_RT11-Jan-07 20:57

Hamid_RT

11-Jan-07 20:57

If you want to use of functions on a dll you need first to load it dll and then use of functions

WhiteSky

uint16_t

ikbahrian10-Jan-07 23:47

ikbahrian

10-Jan-07 23:47

How to get value in 16 bit interger from buffer..thanks in advance.

uint16_t value;

buffer->buf[buffer->buf_end++] = 0x03; //1 byte
buffer->buf[buffer->buf_end++] = 0xe8; //1 byte

Now I want to get like

value= 0x3e8

thanks.

Re: uint16_t

CPallini11-Jan-07 0:05

CPallini

11-Jan-07 0:05

Play it again, Sam?

value = (buffer->buf[buffer->buf_end-2]) << 8 | (buffer->buf[buffer->buf_end-1]);

Note that if yoou load the buffer in reverse order the you can do the quick and dirty:

value = *((unsigned short *)& buffer[buffer->buf_end-2] );

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Re: uint16_t

ikbahrian11-Jan-07 6:10

ikbahrian

11-Jan-07 6:10

thanks ---i manage to do that by ur help

value=(buffer->buf[buffer->buf_ptr+1] << 8 | (buffer->buf[buffer->buf_ptr+2]));

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