Re: error C2664 - C / C++ / MFC Discussion Boards

Re: error C2664

KingsGambit30-Mar-10 22:27

KingsGambit

30-Mar-10 22:27

Forgot to mention CALLBACK in TimerProc declaration?

Re: error C2664

002comp30-Mar-10 23:16

002comp

30-Mar-10 23:16

That I am using CALLBACK in Declaration.

But I got it to work after casting fourth parameter to TIMERPROC.
IS this the right way?

Thanks
Yogesh

Re: error C2664 [modified]

CPallini30-Mar-10 23:28

CPallini

30-Mar-10 23:28

Nope.

However, as Rejeesh suggested, even in Microsoft samples there is the 'cast-hack'.

Anyway, at least on my system, the following declaration:

void CALLBACK myTimerFun(HWND , UINT , UINT_PTR , DWORD );

compiles fine, without the need of casting.
Smile | :)

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

[My articles]

modified on Wednesday, March 31, 2010 5:47 AM

Re: error C2664

Eugen Podsypalnikov31-Mar-10 0:00

Eugen Podsypalnikov

31-Mar-10 0:00

Right

The third parameter may not be a UINT under x64,
it must be UINT_PTR Smile | :)

virtual void BeHappy() = 0;

Re: error C2664 [modified]

002comp31-Mar-10 1:54

002comp

31-Mar-10 1:54

I got it the way u defined and without casting.
thanks

Yogesh

modified on Wednesday, March 31, 2010 8:14 AM

Re: error C2664

KingsGambit30-Mar-10 23:34

KingsGambit

30-Mar-10 23:34

It is always better to avoid type casting if possible. But you can see the MSDN samples for SetTimer() uses type casting Smile | :)

http://msdn.microsoft.com/en-us/library/ms644901(v=VS.85).aspx#creating_timer[^]

Re: error C2664

002comp31-Mar-10 1:35

002comp

31-Mar-10 1:35

So Rajneesh without Type casting ,Is there any other way to solve my prob?
As In my case I am using CALLBACK in declaration.

Thanks
Yogesh

Re: error C2664

KingsGambit31-Mar-10 2:03

KingsGambit

31-Mar-10 2:03

As CPallini suggested change the function signature of Timer proc as follows:

VOID CALLBACK TimerProc(HWND hwnd,
UINT uMsg,
UINT_PTR idEvent,
DWORD dwTime
);

I hope, that would compile without casting.

Re: error C2664

002comp31-Mar-10 2:14

002comp

31-Mar-10 2:14

Yeah,that CPallini method works.
THanks

Re: error C2664

KingsGambit31-Mar-10 2:18

KingsGambit

31-Mar-10 2:18

In fact, if you look at the TIMERPROC definition in winuser.h it is as follows:

typedef VOID (CALLBACK* TIMERPROC)(HWND, UINT, UINT_PTR, DWORD);

Re: error C2664

002comp31-Mar-10 2:28

002comp

31-Mar-10 2:28

Fine, thanks buddy.

Re: error C2664

Emilio Garavaglia30-Mar-10 23:57

Emilio Garavaglia

30-Mar-10 23:57

CALLBACK should be present either in declaration (.h file) and definition (.cpp file).

Otherwise they are two different functions.

In your case the compiler knows about a CALLBACK prototype, by supply a __cdecl function to the linker (it wold have been __stdcall instead).

casting a __cdecl into a __stdcall is dangerous, since the stack is managed differently (you can overwrite some caller / callee local variables ... that could lead to very nasty bugs!

2 bugs found.
> recompile ...
65534 bugs found.
D'Oh! | :doh:

Re: error C2664

arun_pk30-Mar-10 23:26

arun_pk

30-Mar-10 23:26

try giving 4th param as 0

Can the OnSelchange event of the combo box be accessed in any other page

hansrajlal30-Mar-10 21:00

hansrajlal

30-Mar-10 21:00

Hello everyone, I wanted to know if the OnSelChange event of the combo box can be accessed outside of the dialog file, as i need to access and change the code in a different file within the same project.

Re: Can the OnSelchange event of the combo box be accessed in any other page

CPallini30-Mar-10 21:23

CPallini

30-Mar-10 21:23

You may 'forward' the notification: inside the OnSelChange method, nothing prevents you to call any (public) method of any object you may reference.
Smile | :)

Tree View control - Coloum rearrange

arun_pk30-Mar-10 20:18

arun_pk

30-Mar-10 20:18

Hi

I am using a tree view control . there are three columns in my tree view control . is there any way to re arrange the coloumns of tree view control.like if i click on first coloumn and drag to second coloumn second coloumn should be at first coloumns position and first coloumn should be at second coloumns position

Re: Tree View control - Coloum rearrange

Eugen Podsypalnikov30-Mar-10 22:53

Eugen Podsypalnikov

30-Mar-10 22:53

(Wow !) Could you post a screenshot please ? Smile | :)

virtual void BeHappy() = 0;

Re: Tree View control - Coloum rearrange

arun_pk30-Mar-10 23:14

arun_pk

30-Mar-10 23:14

Good to see u again Eugen

Smile | :)

I changed my mind I m using a List view control now
will be great if i get the same functionally of coloumn swaping.......
how do i post an image..?

Re: Tree View control - Coloum rearrange

Eugen Podsypalnikov30-Mar-10 23:25

Eugen Podsypalnikov

30-Mar-10 23:25

No screenshot needed, thank you ! Smile | :)

Try something like it:

.. CYourView::OnInitialUpdate(..)
{
  CBaseOfYourView::OnInitialUpdate(..);
 
  CListCtrl* pcList = GetListCtrl();
  if (pcList) {
    pcList->ModifyStyleEx(0, LVS_EX_HEADERDRAGDROP);
  }
...
}

..or, when your usage of CListCtrl is in a dialog:

BOOL CYourDialog::OnInitDialog()
{
  CYourDialogBase::OnInitDialog();
  CListCtrl* pcList = (CListCtrl*) GetDlgItem(IDC_LIST1); // IDC_LIST1 is resource ID for the list
  if (pcList) {
    pcList->ModifyStyleEx(0, LVS_EX_HEADERDRAGDROP);
  }
...
}

virtual void BeHappy() = 0;

Re: Tree View control - Coloum rearrange

arun_pk30-Mar-10 23:36

arun_pk

30-Mar-10 23:36

Eugen my aplication is win32
so how can i achieve ModifyStyleEx

Re: Tree View control - Coloum rearrange

Eugen Podsypalnikov30-Mar-10 23:40

Eugen Podsypalnikov

30-Mar-10 23:40

Try it, after the list has been created Smile | :)

SendMessage(hWndList, // handle to your list
            LVM_SETEXTENDEDLISTVIEWSTYLE,
            LVS_EX_HEADERDRAGDROP,
            LVS_EX_HEADERDRAGDROP);

virtual void BeHappy() = 0;

Re: Tree View control - Coloum rearrange

arun_pk30-Mar-10 23:46

arun_pk

30-Mar-10 23:46

Thanks a loooot Eugen
again you helped me ...
its working great....

thanks a lot

How I can make my MFC dialoge application workable online?

moh.hijjawi30-Mar-10 7:55

moh.hijjawi

30-Mar-10 7:55

I built an system using MFC dialuge and you can considre it like question answering system take its knowledge from Access DB and the system is just one interface like any chatting interface(msn,yahoo,...) one box for entering text and a nother box for displaying the system answer or text and one send button.

My problem is I need to put my system online So I need your suggestions in this issue?

What are the techniques should I use to make this happen?

I searched about CGI with VC++ and its looks useful and some links told me to convert my system to dll files after that link it to HTML page but I have no experince in both of them so please any one have an ideas thats will be so appreciated because I don't want to read and waste my time in the wrong direction?

Please note: What about the DB because many users should use the system at the same time.

Thanks alot

Re: How I can make my MFC dialoge application workable online?

LunaticFringe30-Mar-10 9:08

LunaticFringe

30-Mar-10 9:08

Write an ASP.NET or Java front end. A CGI implementation would be ugly in the extreme by comparison.

IMHO, of course.

L u n a t i c F r i n g e

Re: How I can make my MFC dialoge application workable online?

moh.hijjawi30-Mar-10 9:28

moh.hijjawi

30-Mar-10 9:28

thanks for your reply but VC++ doesn't support ASP.net and I have no idea about how i can connect the java with MFC.

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