C / C++ / MFC

7-Jun-08 0:41

Hi all,

Esc Button use for Close the Dialog Box.i want to remove the funcnality how can i do this.

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

Gary R. Wheeler7-Jun-08 1:05

Gary R. Wheeler

7-Jun-08 1:05

If you are using MFC, add an OnCancel() handler to your CDialog-derived class.

Software Zen: delete this;
Fold With Us![^]

Nelek7-Jun-08 2:13

7-Jun-08 2:13

He wants to remove the OnCancel, not to call it :P

Regards.
--------
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Gary R. Wheeler7-Jun-08 2:18

Gary R. Wheeler

7-Jun-08 2:18

It sounded like he wanted to prevent the ESC key from closing the dialog. To do that in an MFC application with a CDialog-derived dialog class, you add an empty OnCancel member function.

You can't "remove" OnCancel in any case. The CDialog window procedure is going to call it, either in your class or the base class.

Software Zen: delete this;
Fold With Us![^]

Nelek7-Jun-08 2:22

7-Jun-08 2:22

Gary R. Wheeler wrote:
It sounded like he wanted to prevent the ESC key from closing the dialog

Yes, but if you add the OnCancel () in MFC it usually comes with the return CDialog::OnCancel ()... you just said to add the OnCancel but nothing about an empty OnCancel (what you do have said now Wink | ;)

)

EDIT:

Gary R. Wheeler wrote:
add an OnCancel() handler

Sorry I missread the word handler Roll eyes | :rolleyes:

, so actually the dialog has the function in header but no code in definition, isn't it?

Regards.
--------
M.D.V. Wink | ;)

Rajesh R Subramanian7-Jun-08 6:16

Rajesh R Subramanian

7-Jun-08 6:16

Nelek wrote:
so actually the dialog has the function in header but no code in definition, isn't it?

No, it is not like that. In that case, the linker will issue an unresolved external symbol error.

The OnCancel() function is a virtual function, which can be over-ridden in order to customize its behavior.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Nelek7-Jun-08 2:11

7-Jun-08 2:11

You can add the OnCancel and insteads of return CDialog::OnCancel (); just use an empty return;

Maybe is not the best option but it should work. Other possibility should be to intercept the message loop, but I don't know for sure how to do it correctly, sorry.

Regards.
--------
M.D.V. Wink | ;)

Le@rner7-Jun-08 2:44

7-Jun-08 2:44

now it is not close even with close button or close option from system menu.

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

Jijo.Raj7-Jun-08 3:48

Jijo.Raj

7-Jun-08 3:48

If you just want to disable the Escape button, then do it in the PreTranslateMessage(). See sample below. Now your escape keydown will not be processed. So it won't affect the behavior of cancel and close buttons.

BOOL CDialogDlg::PreTranslateMessage(MSG* pMsg) 
{
    if (pMsg->message == WM_KEYDOWN && (pMsg->wParam == VK_ESCAPE ))
    {
        return TRUE;
    }
	
    return CDialog::PreTranslateMessage(pMsg);
}

Regards,
Jijo.

_____________________________________________________

http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

Nelek7-Jun-08 7:05

7-Jun-08 7:05

Thats what I meant. Thanks for the answer.

Regards.
--------
M.D.V. Wink | ;)

Re: Encryption/Decryption

Michael Schubert7-Jun-08 3:38

Michael Schubert

7-Jun-08 3:38

Have a look here:
http://www.flounder.com/dialogapp.htm#Avoiding%20early%20termination[^]

Encryption/Decryption

H4u327-Jun-08 0:07

H4u32

7-Jun-08 0:07

Hello all,
I have requirement of encrypting a string in VC++ and decrypting it in ASP. so how could i accomplish this task.??

Please help me out in this situation.

Thanks & Regards,
Hemang

Saurabh.Garg7-Jun-08 3:03

Saurabh.Garg

7-Jun-08 3:03

You can use crypto++ for encryption in C++. For decrypting in ASP...well ask in ASP forum Poke tongue | ;-P

-Saurabh

Re: Encryption/Decryption

Hamid_RT7-Jun-08 21:15

Hamid_RT

7-Jun-08 21:15

Does http://www.codeproject.com/KB/security/RSAEncryption.aspx[^] helpful?

Column Count ?

kk.tvm6-Jun-08 23:59

kk.tvm

6-Jun-08 23:59

Hi Friends

How to get count of columns in a CListCtrl

-RisKhan-

Re: Column Count ?

Mukesh Kumar7-Jun-08 1:00

Mukesh Kumar

7-Jun-08 1:00

Use Header Control of CListCtrl.
For Example:

CListCtrl* pmyListCtrl;
int nColumnCount = pmyListCtrl->GetHeaderCtrl()->GetItemCount();

Mukesh Kumar
Software Engineer

Re: Column Count ?

kk.tvm7-Jun-08 3:17

kk.tvm

7-Jun-08 3:17

thanks

-RisKhan-

Re: Column Count ?

Hamid_RT7-Jun-08 21:17

Hamid_RT

7-Jun-08 21:17

And see Using the List Control[^] Matt Weagle wrote:"Everything you need to know about using the standard list control in your applications".

Focus on ListCtrl.

Le@rner6-Jun-08 23:36

6-Jun-08 23:36

Hi all,

How can focused on ListCtrl at the time of Tabstop.

Thanks

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

Re: Focus on ListCtrl.

Hamid_RT7-Jun-08 21:16

Hamid_RT

7-Jun-08 21:16

Can be more specific.

Re: Focus on ListCtrl.

Le@rner8-Jun-08 18:31