Re: Getting the sender on button click in MFC

From:

"AliR $VC++ MVP$" <AliR@online.nospam>

Newsgroups:

microsoft.public.vc.mfc

Date:

Mon, 16 Mar 2009 10:33:11 -0500

Message-ID:

<Qjuvl.22335$Ws1.1980@nlpi064.nbdc.sbc.com>

You can also use ON_CONTROL_RANGE.

BEGIN_MESSAGE_MAP(CTesterDlg, CDialog)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
//}}AFX_MSG_MAP
ON_CONTROL_RANGE(BN_CLICKED,IDC_BUTTON1, IDC_BUTTON3,OnBnClickedButton)
END_MESSAGE_MAP()

void CTesterDlg::OnBnClickedButton(UINT nID)
{
//the id of the button is passed to this method.
}

You just have to make sure that there isn't anything that sends a BN_CLICKED
in the ids between IDC_BUTTON1 and IDC_BUTTON3, otherwise you will get those
clicks also.

AliR.

"Ergodyne" <Ergodyne@discussions.microsoft.com> wrote in message
news:6B8DF2E7-AAA3-42B8-A8D0-77FE32780759@microsoft.com...

I'm wondering how you can find out which control that sent a message in
MFC.

For example, I have a dialog with 3 buttons that basically whil to the
same
stuff so I want to use only one event handler to all of them. Is that
possible?

I have
[Code]

BEGIN_MESSAGE_MAP(CTesterDlg, CDialog)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
//}}AFX_MSG_MAP
ON_BN_CLICKED(IDC_BUTTON1, &CTesterDlg::OnBnClickedButton)
ON_BN_CLICKED(IDC_BUTTON2, &CTesterDlg::OnBnClickedButton)
ON_BN_CLICKED(IDC_BUTTON3, &CTesterDlg::OnBnClickedButton)

END_MESSAGE_MAP()

[/Code]

And so in the OnBnClickedButton I would like to be able to find out which
button called it. The problem is that this function does not take any
parameters.

[Code]

void CTesterDlg::OnBnClickedButton()
{
// TODO: Add your control notification handler code here

}

[/Code]

I'm using VS 2008