C / C++ / MFC Discussion Boards

Re: Hook ?

Hamid_RT11-Jun-08 1:15

Hamid_RT

11-Jun-08 1:15

I gald it was helpful for you. Big Grin | :-D

Re: Hook ?

york52811-Jun-08 4:22

york528

11-Jun-08 4:22

i still have a question

i wanna rewrite a Dialog project and try to use those funtions

when i use CCriticalSection and i include the <afxmt.h>

some functions and variables can't be seen in a Thread function

it shows that

error C2065: 'USES_CONVERSION' : undeclared identifier
error C2065: 'ReadDirectoryChangesW' : undeclared identifier
error C2065: 'm_list' : undeclared identifier
error C2227: left of '->InsertItem' must point to class/struct/union
error C2227: left of '->GetItemCount' must point to class/struct/union
error C2227: left of '->SetItemText' must point to class/struct/union

How can i deal with it ??

And why ??

Re: Hook ?

Hamid_RT11-Jun-08 5:44

Hamid_RT

11-Jun-08 5:44

Did you include Header files WinBase.h Windows.h ?

Re: Hook ?

york52811-Jun-08 6:51

york528

11-Jun-08 6:51

no

but i tried include windows.h and winbase.h

still have two error

error C2065: 'USES_CONVERSION' : undeclared identifier
error C2065: 'ReadDirectoryChangesW' : undeclared identifier

should i include other head file or something??

thank you

Re: Hook ?

Hamid_RT11-Jun-08 7:51

Hamid_RT

11-Jun-08 7:51

I can use of these files without any header file (Im using of Visual Sudio 2008) but what was your application type and whats your IDE?

Re: Hook ?

york52811-Jun-08 8:00

york528

11-Jun-08 8:00

Dialog-Based project

IDE is VC 6.0

if i don't include <afxmt.h>

that part is all right

but there is other error

error : missing ';' before identifier 'm_Sec'
error C2501: 'CCriticalSection' : missing storage-class or type specifiers
fatal error C1004: unexpected end of file found

so that makes me confused

Re: Hook ?

york52811-Jun-08 8:12

york528

11-Jun-08 8:12

last reply

i miss something
it's if i don't include afxmt.h

Re: Hook ?

Hamid_RT12-Jun-08 6:17

Hamid_RT

12-Jun-08 6:17

search on the header files of VC(ctrl+shift+F) and see is it existing on Winbase.h or windows.h?

C++ objects persistance and serialization over network

Ahmed Charfeddine10-Jun-08 5:48

Ahmed Charfeddine

10-Jun-08 5:48

I succeded to convince my boss to give me some time to implement somesort of code in order to facilitate my future job of persisting multiple types of C++ objects into database, as well as the automatic transmittion of objects through the network.

For the time being I have some ideas to start with creating something like CArchive, and play with multiple implementation/overriding of the >> operator.
I already developed somthing that easily trasmits a line of different types of primitive objects.Now I think I need an XML parser to the job of hiearchically representing a complex object into a stream of data that will be sent. The same way I need something that eases the persistance of objects into database and their reconstruction from database records ?

Please help me, and I know you always do.
Thank you in advance.

Our Philosophy, Mohammed Baqir Al Sadr

Re: C++ objects persistance and serialization over network

Mark Salsbery10-Jun-08 6:00

Mark Salsbery

10-Jun-08 6:00

That's a pretty open-ended topic Smile | :)

The .NET framework can help a lot, especially if you go the XML route.
Generally, very little work is required to serialize managed objects.

For native C++, this article may help with some ideas:
Roll Your Own Persistence Implementations to Go Beyond the MFC Frontier[^]

Just my 2 cents,
Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: C++ objects persistance and serialization over network

Ahmed Charfeddine10-Jun-08 22:21

Ahmed Charfeddine

10-Jun-08 22:21

Thank you, thank you very much for that link indeed.

Our Philosophy, Mohammed Baqir Al Sadr

Re: C++ objects persistance and serialization over network

Nemanja Trifunovic10-Jun-08 6:16

Nemanja Trifunovic

10-Jun-08 6:16

Have a look at Boost Serialization[^] library. It does pretty much what you are trying to implement.

Programming Blog

utf8-cpp

Re: C++ objects persistance and serialization over network

Ahmed Charfeddine10-Jun-08 22:23

Ahmed Charfeddine

10-Jun-08 22:23

Thank you,too,Nemanja.

Our Philosophy, Mohammed Baqir Al Sadr

MDI child windows maximize

followait10-Jun-08 3:31

followait

10-Jun-08 3:31

//maximized, but the system menu(max,min,restore disappeares), how to let them appear?
BOOL CChildFrame::PreCreateWindow(CREATESTRUCT& cs)
{
	 cs.style=WS_CHILD|WS_MAXIMIZE;  

	if( !CMDIChildWndEx::PreCreateWindow(cs) )
		return FALSE;

	return TRUE;
}
//not maximized,why?
BOOL CChildFrame::PreCreateWindow(CREATESTRUCT& cs)
{
	 cs.style|=WS_CHILD|WS_MAXIMIZE;  

	if( !CMDIChildWndEx::PreCreateWindow(cs) )
		return FALSE;

	return TRUE;
}

code in MFC

followait10-Jun-08 3:12

followait

10-Jun-08 3:12

BOOL CChildFrame::PreCreateWindow(CREATESTRUCT& cs)
{
	if( !CMDIChildWndEx::PreCreateWindow(cs) )
		return FALSE;

	return TRUE;
}

why not like below?

BOOL CChildFrame::PreCreateWindow(CREATESTRUCT& cs)
{
	return CMDIChildWndEx::PreCreateWindow(cs)
}

Re: code in MFC

toxcct10-Jun-08 3:17

toxcct

10-Jun-08 3:17

coded in the dark maybe ? ^^

seriously, I see no reasons at first sight...

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

Re: code in MFC

David Crow10-Jun-08 3:19

David Crow

10-Jun-08 3:19

The former may have been what was left after some code was removed. For example:

BOOL CChildFrame::PreCreateWindow(CREATESTRUCT& cs)
{	
    if( !CMDIChildWndEx::PreCreateWindow(cs) )		
    {
        // do some other things here before returning
        return FALSE;	
    }
 
    return TRUE;
}

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: code in MFC

Mark Salsbery10-Jun-08 6:04

Mark Salsbery

10-Jun-08 6:04

It looks like code the wizard would create, so you can insert your code before
the return TRUE;

If you're just going to call the base class, why override it?

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: code in MFC

Joe Woodbury10-Jun-08 6:04

Joe Woodbury

10-Jun-08 6:04

David Crow's mostly right, except you will likely add code before the TRUE (or before the PreCreateWindow.)

I was going to add that if you don't add code, the compiler will optimize the construct away. Out of curiosity, I tested this on VS 2005 and VC++ 6 and the result was a horror. For those curious, here's the resulting code with optimizations on:

mov    eax, DWORD PTR _cs$[esp-4]
push   eax
call   ?PreCreateWindow@CView@@MAEHAAUtagCREATESTRUCTA@@@Z
neg    eax
sbb    eax, eax
neg    eax
ret    4

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Re: code in MFC

sudhir_Kumar10-Jun-08 20:06

sudhir_Kumar

10-Jun-08 20:06

NO difference.

-@SuDhIrKuMaR@-

How can find Feburary is Leap year or not?

Le@rner10-Jun-08 2:52

Le@rner

10-Jun-08 2:52

Hi all,

Please tell me how can find the Feburary is Leap Year or not.

How can Check the number of days of Feburary,it is 28 or 29.

please help me for this.

I m waiting for your Valuable suggestions.

Thanks in Advance.

IN A DAY, WHEN YOU DON'T COME ACROSS ANY PROBLEMS - YOU CAN BE SURE THAT YOU ARE TRAVELLING IN A WRONG PATH

Re: How can find Feburary is Leap year or not?

CPallini10-Jun-08 3:04

CPallini

10-Jun-08 3:04

Well it is simple:

bool isLeapYear(int year )
{
  return  year % 400 ? year % 100 ? year % 4 ? false : true : false : true;
}

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.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

Re: How can find Feburary is Leap year or not?

Jijo.Raj10-Jun-08 4:34

Jijo.Raj

10-Jun-08 4:34