C / C++ / MFC

Naveen19-Sep-06 23:31

Naveen

19-Sep-06 23:31

For a hook to be globel, u must write the hook procedure in a dll. Paste the code here so that we can check whats wrong with it..

nave

_anil_19-Sep-06 23:40

_anil_

19-Sep-06 23:40

Thanks for your quick response
I have not done much but still you can check the code

This is the code from the dll Just have 3 function now
Install Uninstall and the global Keyboar procedure.

<br />
LRESULT CKeyHook::InstallKeyHook()<br />
{ <br />
	g_hHook = ::SetWindowsHookEx(WH_KEYBOARD, KeyboardProc, AfxGetInstanceHandle(), 0);<br />
	return( KH_OK );<br />
}<br />
<br />
LRESULT CKeyHook::UninstallKeyHook()<br />
{<br />
	::UnhookWindowsHookEx(g_hHook);<br />
	return( KH_OK );<br />
}<br />
<br />
LRESULT CALLBACK KeyboardProc(INT nCode, WPARAM wParam, LPARAM lParam)<br />
{	<br />
        switch (nCode)<br />
	{<br />
	case HC_ACTION:<br />
		{<br />
			// Disable All<br />
			return 1;<br />
		}<br />
	}<br />
	return ::CallNextHookEx(g_hHook, nCode, wParam, lParam);	<br />
}<br />

The test application just call InstallKeyHookin InitDialog
and UnInstallKeyHook in OnClose.

Regards
Anil

Naveen19-Sep-06 23:55

Naveen

19-Sep-06 23:55

_anil_ wrote:
g_hHook = ::SetWindowsHookEx(WH_KEYBOARD, KeyboardProc, AfxGetInstanceHandle(), 0);

i think the problem is with the AfxGetInstanceHandle() used here. What i suggest is create a globel variable of HINSTANCE and set this parameter with the HINSTACE coming in the dll main. If ur using an MFC dll, set this variable as follows

BOOL CDllApp::InitInstance()
{
AFX_MANAGE_STATE(AfxGetStaticModuleState());
hins=AfxGetInstanceHandle();
return CWinApp::InitInstance();
}

now pass this variable in the SetWindowsHookEx function

nave

_anil_20-Sep-06 0:02

_anil_

20-Sep-06 0:02

Superb Its worked. Big Grin | :-D

Now please tell me what is the difference beteewn the two? D'Oh! | :doh:

Why did you think that that should be the error place.

Regards
Anil

edit control how to get deleted text

Naveen20-Sep-06 2:11

Naveen

20-Sep-06 2:11

sorry it wasn't the problem of taking the hinstance value in InitInstance. It was the problem of not calling AFX_MANAGE_STATE(AfxGetStaticModuleState());

i tried calling AfxGetInstanceHandle() from a dll as follow.

HINSTANCE h2 = AfxGetInstanceHandle();// Returns the instance of the exe
AFX_MANAGE_STATE(AfxGetStaticModuleState());
HINSTANCE h = AfxGetInstanceHandle();// Returns the instance of the dll

now i think u understood the problem.

nave

harsha_123419-Sep-06 22:37

harsha_1234

19-Sep-06 22:37

hi,

in an edit control if multiple characters are selected and user presses delete button how we can deleted text that is "selected text" in WM_KEYDOWN or
OnKeyDown handler??

same thing with OnChar also for backspace!!

Thanks and regards
Harshal

Rinu_Raj19-Sep-06 22:46

19-Sep-06 22:46

Call the CWnd::OnkeyDown() in the overrided Onkeydown()

Rinu Raj

harsha_123419-Sep-06 22:55

harsha_1234

19-Sep-06 22:55

hi rinu,
thanks for replying.
but what i want to do is something different

suppose "abcd" is the selected text and the caret is
positioned before 'a' and if someone presses delete
whole text will delete so i want to retrieve that text before it gets deleted.
means i want abcd to be stored in some buffer or CString variable

thank's
Harshal

Rinu_Raj19-Sep-06 23:08

19-Sep-06 23:08

You may check whether the DEL key is pressed in the OnKeydown() If it is pressed then store the edit box content in a string variable. After that call the CWnd::OnKeydown()

Rinu Raj

toxcct19-Sep-06 22:48

toxcct

19-Sep-06 22:48

use CEdit::ReplaceSel("")[^]

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

How to display CStatic

gomez_a19-Sep-06 22:33

19-Sep-06 22:33

I have an MFC application (VS 2003 Std). There is a dialog window with CStaticText. For example:
CStatic lblRecno;

I want to change the colour of the CStaticText.
I am using the OnCtlColor function:

HBRUSH DlgBackup::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
HBRUSH hbr = NULL;
/*
if(pWnd->GetDlgCtrlID() == IDC_STATIC_LP)
or
*/
if( nCtlColor == CTLCOLOR_STATIC )
{
pDC->SetTextColor(clBlack);
pDC->SetBkMode(TRANSPARENT);
hbr = (HBRUSH) GetStockObject( NULL_BRUSH );
}
else
{
hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
}

return hbr;
}
To this place is OK.

Now I am changeing the lblRecno value in the while loop:
int lp = 0;
CString newTxt = "";
while(...)
{
++lp;
bewTxt.Format("%d", lp);
lblRecno.SetWindowText(newTxt);
}
But the new value lblRecno is displaying in the place of the previous value, an so on.
I think I should to use the WM_ERASEBKGND, but I don't know how to do it.

Can you help me.

Regards
mwgomez
Poland

Rinu_Raj19-Sep-06 22:39

19-Sep-06 22:39

What you want actually to show the static text one after another.
If you just place a while loop you can see that last value only.
Try with a timer updating the window text in regular intervals say 1 sec

Rinu Raj

gomez_a19-Sep-06 23:58

19-Sep-06 23:58

No it doesn't work. Please try it.

I don't create CStatic it my sorce code, it is on the dialog window.
I am setting the new Value by lblRecno.SetWindowText(...)
I am setting the CStatic colour by OnCtlColor(...)
and the TIMER

void CDemoDlg::OnTimer(UINT nIDEvent)
{
lblLP.Invalidate();
CDialog::OnTimer(nIDEvent);
}

Regards
mwgomez

Rinu_Raj20-Sep-06 0:03

20-Sep-06 0:03

inside the timer do

void CDemoDlg::OnTimer(UINT nIDEvent)
{
static int lp = 0;
CString newTxt = "";
++lp;
newTxt.Format("%d", lp);
lblRecno.SetWindowText(newTxt);
}

then Start the timer in the initdialog

Rinu Raj

gomez_a20-Sep-06 1:19

20-Sep-06 1:19

I think there is steel something wrong.

Please look at my source code. My dialog window is MOkno.h

public:
CStatic lblRecno; // for displaying recno
CButton btnStart; // button Start
int iLicznik; // increment variable
CString newTxt; // new value of the text = iLicznik as a Text

MOkno.cpp:

BOOL MOkno::OnInitDialog()
{
CDialog::OnInitDialog();
// TODO:
SetTimer(ID_TIMER1, 1000, NULL); // my Timer is running every 1 s
return TRUE;
}

HBRUSH MOkno::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
HBRUSH hbr;
if(nCtlColor == CTLCOLOR_STATIC )
{
pDC->SetBkMode(TRANSPARENT);
pDC->SetTextColor(clBlue);

hbr = (HBRUSH) GetStockObject( NULL_BRUSH );
}
else
{
hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
}

return hbr;
}

void MOkno::OnClose()
{
KillTimer(ID_TIMER1);
CDialog::OnClose();
}

On the dialog window tehre is a Start button. When user click on the button:
void MOkno::OnBnClickedButtonStart()
{
iLicznik = 0;
newTxt = "";
// suppose: It is a database, and I am reading records
// and display the current recno number
for(iLicznik = 1; iLicznik <= 1000; iLicznik++)
{
newTxt.Format("%d", iLicznik);
}
}

void MOkno::OnTimer(UINT nIDEvent)
{
CDialog::OnTimer(nIDEvent);
lblRecno.SetWindowText(newTxt);
}

Regards
mwgomez

Rinu_Raj20-Sep-06 1:49

20-Sep-06 1:49

There are some problems in your code

You may modify code like this

void MOkno::OnBnClickedButtonStart()
{
SetTimer( ...) // Set the timer here not in the oninitdialog
}

void MOkno::OnTimer(UINT nIDEvent)
{
static int i =0;
newTxt.Format( "%d", ++i );
lblRecno.SetWindowText(csTex);
CDialog::OnTimer(nIDEvent);
}

Rinu Raj

gomez_a20-Sep-06 2:34

20-Sep-06 2:34

Thank you for yuour help, I must find the reason...

Regards
mwgomez

David Crow20-Sep-06 2:53

David Crow

20-Sep-06 2:53

Your code is doing exactly what it is supposed to do. Paint-related messages are low priority so they do not get handled if other, high-priority messages are in the queue. This is why you do not see the lblRecno control being updated until the end. Lose the timer stuff and try:

void MOkno::OnBnClickedButtonStart()
{
    for(int iLicznik = 1; iLicznik <= 1000; iLicznik++)
    {
        CString newTxt;
        newTxt.Format("%d", iLicznik);
        lblRecno.SetWindowText(newTxt);
    }
}

I just tried this (using 10000) and it worked fine.

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