C / C++ / MFC

How to access properties of ActiveX control in atl

11-Oct-07 18:00

You should avoid IsBadReadPtr and IsBadWrite pointer like the plague. See here[^] and here[^]. If you get a bad pointer the best thing that you can do is ***NOT*** attempt to validate it and let the application crash so it can be debugged.

Steve

Rajesh_Yadav_8011-Oct-07 2:40

Rajesh_Yadav_80

11-Oct-07 2:40

hello friends,

i trying to access properties of activeX control throught atl dialog, but unable to access, also unable to create a control variable of activeX control, which can be create in mfc.

thnx...

Rajesh

Re: How to access properties of ActiveX control in atl

Matthew Faithfull11-Oct-07 2:52

Matthew Faithfull

11-Oct-07 2:52

Have a look at the ActiveX Control Test Container tool which Microsoft ship with VC6. If you hunt around on the Web the source for it is available. It's ATL and does just about everything with ActiveX controls that you can imagine and some stuff that I still can't even after I read it.

Nothing is exactly what it seems but everything with seems can be unpicked.

How to send hex data to TCP socket using Winsock

alofang11-Oct-07 2:35

alofang

11-Oct-07 2:35

I need to send some raw data from a packet sniffed by Ethereal. Someone knows how?

Re: How to send hex data to TCP socket using Winsock

ThatsAlok11-Oct-07 2:55

ThatsAlok

11-Oct-07 2:55

alofang wrote:
I need to send some raw data from a packet sniffed by Ethereal. Someone knows how?

just convert that to char and send it TCP via socket!

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Re: How to send hex data to TCP socket using Winsock

alofang11-Oct-07 4:13

alofang

11-Oct-07 4:13

Thx so much

Background color

ArielR11-Oct-07 2:33

ArielR

11-Oct-07 2:33

Does exist a simple way to change the background color of edit and button ctrls when has the focus? thanks VC6++

Nelek11-Oct-07 2:41

Nelek

11-Oct-07 2:41

Take a look in SetBkColor ()

Greetings.

--------
M.D.V.

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?

Help me to understand what I'm saying, and I'll explain it better to you

Wink | ;)

ThatsAlok11-Oct-07 3:55

ThatsAlok

11-Oct-07 3:55

Nelek wrote:
Take a look in SetBkColor ()

it will not work.. you have to subclass

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Stephen Hewitt11-Oct-07 18:42

11-Oct-07 18:42

Not true. Consider this code (dots are code that's been omitted):
=================================================================

In ".h" file.
-------------
class CFocusColourDlg : public CDialog
{
.
.
.
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CFocusColourDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
virtual BOOL OnCommand(WPARAM wParam, LPARAM lParam);
//}}AFX_VIRTUAL

// Implementation
protected:
HICON m_hIcon;
CBrush m_RedBrush;

// Generated message map functions
//{{AFX_MSG(CFocusColourDlg)
virtual BOOL OnInitDialog();
afx_msg void OnPaint();
afx_msg HCURSOR OnQueryDragIcon();
afx_msg HBRUSH OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor);
afx_msg void OnDestroy();
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};

In ".cpp" file.
---------------
.
.
.
BEGIN_MESSAGE_MAP(CFocusColourDlg, CDialog)
//{{AFX_MSG_MAP(CFocusColourDlg)
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_WM_CTLCOLOR()
ON_WM_DESTROY()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CFocusColourDlg message handlers

BOOL CFocusColourDlg::OnInitDialog()
{
CDialog::OnInitDialog();

// Set the icon for this dialog. The framework does this automatically
// when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon

// TODO: Add extra initialization here
m_RedBrush.CreateSolidBrush(RGB(255, 0, 0));

return TRUE; // return TRUE unless you set the focus to a control
}
.
.
.
BOOL CFocusColourDlg::OnCommand(WPARAM wParam, LPARAM lParam)
{
WORD NotifyCode = HIWORD(wParam);
WORD Id = LOWORD(wParam);
HWND hWnd = reinterpret_cast<HWND>(lParam);

if (NotifyCode==EN_SETFOCUS || NotifyCode==EN_KILLFOCUS)
{
::InvalidateRect(hWnd, NULL, TRUE);
}

return CDialog::OnCommand(wParam, lParam);
}

HBRUSH CFocusColourDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);

if (pWnd->GetSafeHwnd() == ::GetFocus())
{
pDC->SetBkColor(RGB(255, 0, 0));
return m_RedBrush;
}

return hbr;
}

void CFocusColourDlg::OnDestroy()
{
CDialog::OnDestroy();

m_RedBrush.DeleteObject();
}

Steve

ThatsAlok11-Oct-07 19:15

ThatsAlok

11-Oct-07 19:15

but according to OPPs principal.. i am just abstracting that thing from outer world i.e. Dialog!

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Stephen Hewitt11-Oct-07 19:18

11-Oct-07 19:18

This approach doesn't necessarily break OOP principles; there's nothing wrong with an edit control asking its parent what colour it should use.

Steve

ThatsAlok11-Oct-07 3:54

ThatsAlok

11-Oct-07 3:54

ArielR wrote:
Does exist a simple way to change the background color of edit and button ctrls when has the focus? thanks VC6++

you need to SUBCLASS that control to achieve same.. search SUBCLASS by mr Chris!

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

ArielR11-Oct-07 5:52

ArielR

11-Oct-07 5:52

Thank for your reply. The SUBCLASS change the background color by the mouse movement. I need to change the color when it was focused by mouse or tab order. Could you help me? Thanks

Stephen Hewitt11-Oct-07 18:49

11-Oct-07 18:49

Not so. See here[^]

Steve

ThatsAlok11-Oct-07 19:14

ThatsAlok

11-Oct-07 19:14

he he he.. good one.. i already got your answer Smile | :)

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Stephen Hewitt11-Oct-07 18:50

Only digits in CRichEditCtrl

11-Oct-07 18:50

You could subclass it or use this[^] approach.

Steve

prithaa11-Oct-07 1:50

prithaa

11-Oct-07 1:50

Hello,

I want only digits in CRichEditCtrl then what type of edit styles should I use or there is no such edit style and I will have to write code for it .

Regards,
Prithaa

Nishad S11-Oct-07 2:04

Nishad S

11-Oct-07 2:04

ES_NUMBER style.

You can set it from resource editor also if you are placing it in the dialog resource.

- NS -

prithaa11-Oct-07 2:55

prithaa

11-Oct-07 2:55

Hello,

No I am not using resource editor.I am placing it on a window derived from CMDIChildWnd.

Is there anything else?

Thanks,
Prithaa

David Crow11-Oct-07 3:56

David Crow

11-Oct-07 3:56

The style still applies whether you add it at design time or run time.

You can also derive a class from CRichEditCtrl, and override the OnChar() method.

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