Serialization and BSTRs - C / C++ / MFC Discussion Boards

Re: Coding time comparisons across languages

jspano10-Feb-04 1:41

10-Feb-04 1:41

Java is probably the language I know least about. I only need it to run on Linux right now. Is java capable of doing a high volumn call center app? Will it be fast enough? Most of it won't be web based, but client based with a sql server or db2 backend.

TIA

Re: Coding time comparisons across languages

antlers10-Feb-04 4:52

antlers

10-Feb-04 4:52

This type of application is very typical of what people have been using Java to do. IBM's whole Linux push is based on Java applications.

how to send array through Socket

Anonymous6-Feb-04 2:28

Anonymous

6-Feb-04 2:28

hi,

i have created an array
UCHAR * data;
data = new UNCHAR [size]

i saved data in it ,, that PCM data (pulse code modulation)

now i want to send this (array) throught socket.
how can i

CSocket->send ( ...... , .. , ...);

Plz reply me

thanx

Re: how to send array through Socket

RobJones6-Feb-04 3:46

RobJones

6-Feb-04 3:46

I dont know the exact syntax for CSocket but I use something like the following for sending a struct through a SOCKET..

// where sSend is a struct containing CHAR's and INT's
send(sock,(char FAR*)&sSend, sizeof(sSend), 0);

Rob

Whoever said nothing's impossible never tried slamming a revolving door!

how to load a small Icon and a text string in a combo box ???

skpanda6-Feb-04 1:48

skpanda

6-Feb-04 1:48

hello ,

i want to load icon & text string in a combo box, like the following...

-------------------------------
icon1 "text string"
icon2 "text string"
icon3 "text string"
;;;;;;;;
;;;;;;;
like that
------------------------------------

how to do that in run time in a dialog based application and form based application projects ....where these r frequent ?
waiting for reply.....

skpanda

Re: how to load a small Icon and a text string in a combo box ???

David Crow6-Feb-04 2:35

David Crow

6-Feb-04 2:35

Can you use CComboBoxEx?

A rich person is not the one who has the most, but the one that needs the least.

MFC

Member 8665696-Feb-04 1:28

Member 866569

6-Feb-04 1:28

When creating a standatd multidoc MFC application with class wizard there is a menu that enables the user to hide the toolbar or statusbar i wish to implement something similar in my application however, with multiple toolbars.

i went through the class wizard's code sample and i could not find the implementation of the menu - the MSDN sais that in order to implement the menu one shold override their imlementation but the don't say how.

please help me.

Serialization and BSTRs

Anonymous6-Feb-04 1:24

Anonymous

6-Feb-04 1:24

Hello!

I want to write an object to CArchive. My object is:

typedef struct tMyStructTag
{
  long index;
  BSTR data;
  BSTR description;
} tMyStruct;

To write data to archive I do this:

1. Open the (CFile) file in r/w mode
2. Create an archive using the open file
3. Write the data

tMyStruct myStruct; 
// Add data to myStruct
pFile->Open(...
pArchive = new CArchive(pFile, CArchive::store);
(*pArchive) << (CString)(myStruct.index);
(*pArchive) << (CString)(myStruct.data);
(*pArchive) << (CString)(myStruct.description);

Is it correct so far?

When I come to read data back, I do the same but call SeekToBegin() function for CFile class, then I read data like this:

tMyStruct myStruct; 
CString strData, strDescription;
(*pArchive) >> myStruct.index; 
(*pArchive) >> strData; 
(*pArchive) >> strDescription;
myStruct.bstrData = strData.AllocSysString();
myStruct.bstrDescription = strDescription.AllocSysString();
// ...do something with myStruct
::SysFreeString(myStruct.bstrData);
::SysFreeString(myStruct.bstrDescription);

When I do this for more than one object, I get data in wrong fields. I look at resulting file and it looks OK. I just cannot read data back correctly. Any help please?

Help - Additional Segments Need to be defined ???

alien0016-Feb-04 1:00

alien001

6-Feb-04 1:00

Please help ..

I am receiving the following Fatal Linker error on Borland Builder 5 .. "Additional Segments Need To Be Defined in a .def File"

This error has only started to appear since adding some new files to an existing project, prior to that everything was fine.

I have searched the web to no avail regarding this problem ... any help that can be offered would be gratefully received .. Sigh | :sigh:

Re: Help - Additional Segments Need to be defined ???

David Crow6-Feb-04 2:41

David Crow

6-Feb-04 2:41

alien001 wrote:
I am receiving the following Fatal Linker error on Borland Builder 5...I have searched the web to no avail

Have you tried a Borland Builder 5 newsgroup or forum?

What is the linker error number? Have you consulted the docs for that number?

A rich person is not the one who has the most, but the one that needs the least.

Re: Help - Additional Segments Need to be defined ???

alien0016-Feb-04 3:33

alien001

6-Feb-04 3:33

There is no linker error number .. the full statement reads ..

[Linker Fatal Error] Fatal: 'E:\views\view1\Myfolder\base\customer\a\base.C': Additional segments need to be defined in a .def file

Re: Help - Additional Segments Need to be defined ???

David Crow6-Feb-04 4:12

David Crow

6-Feb-04 4:12

Ok, so have you added additional segments to the .def file?

A rich person is not the one who has the most, but the one that needs the least.

Re: Help - Additional Segments Need to be defined ???

Anonymous6-Feb-04 4:17

Anonymous

6-Feb-04 4:17

I have not added any new segments to the .def file .. In fact until the emergence of this problem I was unaware of the existence of the def file and segments .. any explanation would be helpful ..

I simply added some new c files to an existing project .. the project was fine prior to that. The files added have no compilation issues and are used on other projects without any problems ..

Re: Help - Additional Segments Need to be defined ???

David Crow6-Feb-04 4:32

David Crow

6-Feb-04 4:32

There is a good discussion here.

A rich person is not the one who has the most, but the one that needs the least.

MFC

Mohannadfx6-Feb-04 0:43

Mohannadfx

6-Feb-04 0:43

Hi everyone,

Hi everyone

im very new to visual c++ programming, although i worked on borland c++ before.

i have a problem in controlling some controls according to a certain conditions.

for example;
I have two dialogs:
The first one is to ask the user

How many edit boxes he want to see?

The second dialog should show him the number of edit boxes he entered in the first editbox;

So if the user has entered (2) in the editbox in the first dialog,

he must see two editboxes in the second dialog.

It is very important for me to know this
Please just remember that im very new to MFC programming, so write me a clear code as a beginner.

thank you for reading my messege

F.X

Re: MFC

фил6-Feb-04 0:59

фил

6-Feb-04 0:59

void CYourDialog::OnButtonEnterDlgNum(void)
{
char lpBuffer[256];
m_YourEditCtrl.GetWindowText(lpBuffer, 255);

// you could also use this
// GetDlgItem(IDC_YOUREDITCTRL)->GetWindowText(lpBuffer, 255);

int iMax = atoi(lpBuffer);
CEdit *ceEdit;
for(int i = 0; i < m_yourint = iMax; i++)
{
ceEdit = new CEdit;
ceEdit.Create(0/* your styles */, CRect(0, 0, 0, 0) /* your rect */, m_YourSecondDlg /* the CWnd object of your 2 dialog */, IDC_ID + i /* your ID (must be unique!)*/);
}
}

hope this helps

Я люблю русский язикь!

Which recordset to use CRecordset or CDaoRecordset with Ms Access database?

d01530306-Feb-04 0:19

d0153030

6-Feb-04 0:19

Which recordset to use CRecordset or CDaoRecordset with Ms Access database?

I had seens many posts,threads and source code on various forums that uses CDaoRecordset Blush | :O

with MSAccess data baseand some uses CRecordset Hmmm | :|

WHat are pros and cons of using each of them? Confused | :confused:

WHich one is better? D'Oh! | :doh:

Thanking you?

Re: Which recordset to use CRecordset or CDaoRecordset with Ms Access database?

David Crow6-Feb-04 2:49

David Crow

6-Feb-04 2:49

The main difference is that CDaoRecordset accesses data through a Data Access Object (DAO) based on OLE. CRecordset accesses the DBMS through Open Database Connectivity (ODBC) and an ODBC driver for that DBMS. The DAO classes generally offer superior capabilities because they are specific to the Microsoft Jet database engine. So you need to decide if you want to access the data through DAO or ODBC, although the DAO classes can access both types of data sources. That will govern which class to use.

A rich person is not the one who has the most, but the one that needs the least.

SetMenuItemInfo & SysTray

Victor19785-Feb-04 23:56

Victor1978

5-Feb-04 23:56

Such problem. I'm write application(not MFC) with support System Tray Icon. I try to do like this: if I select menu item then he must to set MF_GRAYED, and the other item which was MF_GRAYED must set to MF_ENABLED. For this I'm using SetMenuItemInfo. But this dont work. Though SetMenuDefaultItem is work without problem. Help me, what's the problem? Confused | :confused:

Thanks in advance.

Changing paper size - how???

Anonymous5-Feb-04 23:32

Anonymous

5-Feb-04 23:32

Does anyone know how to change paper size while printing under MFC?
The idea is that page sizes are supposed ti differ from page to page (custom sizes)

Sorry about double post

Anonymous5-Feb-04 23:36

Anonymous

5-Feb-04 23:36

Had slight computer problems.

Re: Changing paper size - how???

CodeBrain6-Feb-04 0:33

CodeBrain

6-Feb-04 0:33

Do you want to change the paper size during a print job or do you want to have different paper sizes for each print job?

If you want to set the paper size for a print job you have to get the printer DC and then you can change the dmPaperSize member of the DEVMODE structure.

But I think you should give some more information what you exactly want to do.

Re: Changing paper size - how???

Anonymous7-Mar-04 21:48

Anonymous

7-Mar-04 21:48

Different paper sizes in one print job, every page different, not standard but custom (arbitrary) paper sizes.

Changing paper size

Anonymous5-Feb-04 23:32

Anonymous

5-Feb-04 23:32

Does anyone know how to change paper size while printing under MFC?
The idea is that page sizes are supposed ti differ from page to page (custom sizes)

Re: Changing paper size

Robert A. T. Káldy7-Feb-04 21:58

Robert A. T. Káldy

7-Feb-04 21:58

You'll need probably different print DC to each page.

CPrintDialog dlg;
HGLOBAL hDevMode = dlg.m_pd.m_hDevMode;
DEVMODE* dm;
CDC dc;

::GlobalAlloc(hDevMode, sizeof(DEVMODE));

for (i = 1; i <= nNumOfPages; i++)
{
	if (dm = (DEVMODE*)::GlobalLock(hDevMode))
	{
		dm->dmPaperLength = 123;  // whatever you want...
		dm->dmPaperHeight = 456;
		::GlobalUnlock(hDevMode);
	}
	dc.Attach(dlg.GetPrinterDC());

	/* Print the page */

	dc.DeleteDC();
}

Robert-Antonio

"I launched Norton Commander and saw, drive C: on the left, drive C: on the right...Damn, why I need two drives C:???So I formatted one..."

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