Re: CArchive & Nested Objects - C / C++ / MFC Discussion Boards

gamitech16-Jun-04 0:07

16-Jun-04 0:07

how can I make the windows taskbar dissapear and then make it appear again.
And please tell me if you know how can I make the start button dissapear and then appear again Smile | :)

Thank you

gabby

Re: appear<-> dissapear

User 665816-Jun-04 1:15

User 6658

16-Jun-04 1:15

http://www.codeproject.com/w2k/AntonioWinLock.asp

regards

modified 12-Sep-18 21:01pm.

finding mail server

gamitech16-Jun-04 0:05

gamitech

16-Jun-04 0:05

how can I get the mail server and port of a certain host.
I know there is a way but I don't k now how I can do this Smile | :)

Please help.

gabby

Re: finding mail server

Henry miller16-Jun-04 3:40

Henry miller

16-Jun-04 3:40

lookup the MX records in DNS. If this isn't what you want you have to ask the user in general. You will have to search a little more to find out how to do this (and if this really gets what you want)

CArchive & Nested Objects

Anonymous15-Jun-04 23:44

Anonymous

15-Jun-04 23:44

Hi!

I have an object which is a container for one or more other objects. I want to serialize my container to disk and serialize the contained objects along with it.

This is what I have:

class CBook;

class CSubject
{
public:
CSubject(){}
~CSubject(){}
protected:
CList <CBook, CBook> m_Books
};

Can someone tell me the best way of doing this?

Must I want to make my CSubject and CBook classes inherit from CObject and then write a serialisation function for each?

Should I just write all my CBooks and index them to the CSubject or is there a proper way to serialize a CSubject object which then will serialize all the CBook objects contained by the CSubject object. Must I want to store pointers to the CBook objects in my list or do I store objects? I think it must be the objects.

Re: CArchive & Nested Objects

Weiye Chen15-Jun-04 23:51

Weiye Chen

15-Jun-04 23:51

Inherit CBook from CObject. Then create a similar Serialize(..) function for your CSubject. Call m_oBooks.Serialize(...) in it. If you have pointers in CBook class, i think you need to implement an override for CBook::Serialize(...) too.

<font=arial>Weiye Chen
When pursuing your dreams, don't forget to enjoy your life...

Re: CArchive & Nested Objects

Anonymous16-Jun-04 0:10

Anonymous

16-Jun-04 0:10

OK but I have one or more CSubject objects and I wish to serialize them all to disk.

So I have a data file which is called library.dat and I want to serialize to this file all my CSubject objects with all the CBook objects each CSubject object contains.

Is this something that CObject will do for me if all my object data members are simple?

Re: CArchive & Nested Objects

Weiye Chen16-Jun-04 3:04

Weiye Chen

16-Jun-04 3:04

Anonymous wrote:
OK but I have one or more CSubject objects and I wish to serialize them all to disk.

Method 1
- Inherit your CSubject from CObject
- Put all your CSubject objects into an array like CObArray
- To save them, call m_oMyObArray.Serialize(...)

Method 2
Assume you have implemented a save function of your CSubject as below:

void CSubject::Save(CArchive& ar)
{
   // Save or load data to or from file
   m_Books.Serialize(ar);
}

Just call Save(...) for each of your CSubject objects, passing in your CArchive object. For example,

void SomeFunction()
{
   CFile oFile;
   if(oFile.Open("C:\\library.dat", CFile::modeCreate | CFile:modeWrite) != FALSE)
   {
      CArchive oArchive(&oFile, CArchive::store);
      oMySubject1.Save(oArchive);
      oMySubject2.Save(oArchive);
      oMySubject3.Save(oArchive);
 
      oArchive.Close();
   }
}

Anonymous wrote:
Is this something that CObject will do for me if all my object data members are simple?

You need to override Serialize for your CBook class. e.g.

void CBook::Serialize(CArchive& oArchive)
{
   if(oArchive.IsStoring() != FALSE)
      oArchive << m_iMyInteger << m_dMyDouble;
 
   else
      oArchive >> m_iMyInteger >> m_dMyDouble;
}

<font=arial>Weiye Chen
When pursuing your dreams, don't forget to enjoy your life...

Re: CArchive & Nested Objects

Anonymous16-Jun-04 4:08

Anonymous

16-Jun-04 4:08

Thank you! I will try to do what you have suggested. I think I understand now Smile | :)

Can I protect my process from the task manager's kill signal?

kelkava15-Jun-04 23:25

kelkava

15-Jun-04 23:25

Dear guys,
Some MFC program runs well.
Someone uses the task manager(by cntl + alt + del) and selects my mfc.
And than, kill my program.

Can I protect my process from the task manager's kill signal?
Additionaly, i don't wanna use the windows's service mechanism(a.k.a daemon)

Thanks,

Re: Can I protect my process from the task manager's kill signal?

toxcct15-Jun-04 23:52

toxcct

15-Jun-04 23:52

nop

protective philosophy...

TOXCCT >>> GEII power

Re: Can I protect my process from the task manager's kill signal?

gamitech16-Jun-04 0:04

gamitech

16-Jun-04 0:04

I think there is a way you can do it but you will need windows hooks.
The cbtroc call back function monitorises when windows are destroyed and get the handle,module filename.
Read More about this in my article about the simple fireawall. There I explain more about windows process hooks.
If you can't handle please contact.

gabby

Re: Can I protect my process from the task manager's kill signal?

toxcct16-Jun-04 0:12

toxcct

16-Jun-04 0:12

SIG_KILL (or another name like that) cannot be catch. this is to prevent any restive process to stay in memory wastefully.

TOXCCT >>> GEII power

Re: Can I protect my process from the task manager's kill signal?

David Crow16-Jun-04 3:19

David Crow

16-Jun-04 3:19

If this was possible, no rogue process could ever be killed. We'd have viruses running rampant!

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

Debugging the spawned process.

Anthony_Yio15-Jun-04 23:15

Anthony_Yio

15-Jun-04 23:15

Hello,

I have two program call it A.EXE and B.EXE . B.EXE will actually invoke the A.EXE through CreateProcess API and establish some piping. If you familiar with wsinetd - Windows Simple inetd daemon or inetd. That is exactly what B.exe does. B.EXE listen to a port number and spawn process based on port number it accept from client which in this case the process been spawned is A.EXE. The communication between A.EXE and B.EXE is through piping. I can get the thing up but the problem now is I need to debug A.EXE in the IDE (meaning I can set break point and etc) cause basically there is where the logics lie.

I have generated the debug info for A.EXE and B.EXE and it is denifitely in debug mode. The compiler setting is /MTd /W3 /DWIN32 /ZI /Od. The PDB file for A.EXE and B.EXE are created and stored in the same directory as A.EXE and B.EXE. I have step into B.EXE no problem but I could not step into the spawned process A.EXE. Any remedies. I have thought of using remote debugging but no luck. Any debugging gurus out there that could shed me light?

thank you.

Sonork 100.41263:Anthony_Yio

Re: Debugging the spawned process.

valikac16-Jun-04 3:29

valikac

16-Jun-04 3:29

Check out Olly Debugger and SoftICE.

Kuphryn

Re: Debugging the spawned process.

Blake Miller16-Jun-04 13:48

Blake Miller

16-Jun-04 13:48

Maybe this would work for you:

DebugBreakProcess

The DebugBreakProcess function causes a breakpoint exception to occur in the specified process. This allows the calling thread to signal the debugger to handle the exception.

BOOL DebugBreakProcess(HANDLE Process);

Have B call this soon after it launches A...

Re: Debugging the spawned process.

Anthony_Yio16-Jun-04 18:38

Anthony_Yio

16-Jun-04 18:38

Actually, your answer is the same as my colleague but my colleague mentioned DebugBreak instead. I have tested it. It doesn't work on DebugBreakProcess but DebugBreak. I think DebugBreakProcess will only work on another process.

thanks by the way. A 5 for your quality reply.

Sonork 100.41263:Anthony_Yio

String conversion

Cedric Moonen15-Jun-04 23:13

Cedric Moonen

15-Jun-04 23:13

Hello !
I have a dll written in C++ that is used in a VB application. In one function, I send a string (BSTR type, so it has the VB format), and I want to convert it into a char* string. How can I do that easily ?

Thank you.

Re: String conversion

Anthony_Yio15-Jun-04 23:37

Anthony_Yio

15-Jun-04 23:37

I think you can do this

<br />
BSTR temp;<br />
char* str = (char*)_bstr_t(temp);<br />

Sonork 100.41263:Anthony_Yio

Re: String conversion

Cedric Moonen15-Jun-04 23:49

Cedric Moonen

15-Jun-04 23:49

Ok thanks, I will try this

Re: String conversion

Rodrigo Pinto Pereira de Souza16-Jun-04 7:11

Rodrigo Pinto Pereira de Souza

16-Jun-04 7:11

The BSTR Value is UNICODE Value, you should use a routine to convert from Unicode to ANSI.

Using cast method, you can lose data, and you can have memory leaks.

The best way to do it is :

USES_CONVERSION
char* a = W2A(bstrvalue);

IMHO you should use UNICODE type, like wchar ao rather than char.

To prevent to have 2 types, you can use TCHAR.

regards

Rodrigo Pinho Pereira de Souza

CEdit.SetWindowText(...);

V.15-Jun-04 22:36

15-Jun-04 22:36

I do this:
m_valueSearchBox.SetWindowText(initValue);
if I do this the initValue string (CString) wil be selected, but I need the cursor behind the text so you can type an appending text.
SetSeldoesn't seem to work?

tnx.

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimmy Hendrix

Re: CEdit.SetWindowText(...);

Dominik Reichl15-Jun-04 22:49

Dominik Reichl

15-Jun-04 22:49

Why shouldn't it? Try this:

CString str;<br />
m_valueSearchBox.GetWindowText(str);<br />
int nPos = str.GetLength();<br />
m_valueSearchBox.SetSel(nPos, nPos, TRUE);

Best regards,
Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

Re: CEdit.SetWindowText(...);

V.15-Jun-04 22:57

15-Jun-04 22:57

tnx for the reply, but I'm afraid I must dissapoint you.
I do this:

<br />
int pos = initValue.GetLength();<br />
m_valueSearchBox.SetWindowText(initValue);<br />
m_valueSearchBox.SetSel(pos, pos, TRUE);<br />

(it's SET not GET, but not important).
What happens is that the cursor is behind the text, BUT the text is selected, so if you start typing ... Frown | :(

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimmy Hendrix

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