C / C++ / MFC

9-May-07 4:58

Take a look at this article.

Best wishes,
Hans

Re: GDI - DC questions

Mark Salsbery9-May-07 6:19

Mark Salsbery

9-May-07 6:19

Nelek wrote:
But... what is exactly this parameter for?

I've never found any documentation on LOGPALETTE.palVersion. I've always used 0x0300 Smile | :)

Nelek wrote:
As those .rc Bitmaps are made in 20-Colors... Do I really need the Palette?

This depends on the format of the DDB. If it's 1, 4, or 8 bitsperpixel then the data for each
pixel is an index into the palette associated with the device that the bitmap is dependent on.
For 16+ bits-per-pixel bitmaps, the color info is stored in each pixels data so no mapping to
a palette is necessary when converting to a DIB.

Since resource bitmaps are meant for display devices, the default system palette should work fine
if you need it for conversion.

If you use GetDIBits to do the conversion, GetDIBits will use the palette associated with the
DC passed to the function.

Here's another article: How To Convert Between Device-Dependent Bitmaps and DIBs[^]

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Thanks

Nelek9-May-07 22:12

Nelek

9-May-07 22:12

Hi,

Thanks a lot for your answers. I have successfully printed using the function DDBToDIB (...) that I found in one Roger Allen's article with some modifications. I have used no CPalette so it doesn't matter the question about the palVersion.

Anyways, although it is not needed anymore because it already works... I would like to understand the first question (about GlobalLock / GlobalUnlock and the other method) that I make the other post "Printing Problems" (Link above in the first message of this thread). I will be very thankfull if someone can answer it.

Another time, thanks. I was desperated, I can now continue working Smile | :)

--------
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?

Service Host

tom groezer9-May-07 3:52

tom groezer

9-May-07 3:52

What is meant by a servicehost and what is the necessity of the same? Why does in XP service run under network and user privilege. One reason which I know a a bit is that microsoft does not want third party services to run under the same privileges.

Mark Salsbery9-May-07 4:29

Mark Salsbery

9-May-07 4:29

I'm not sure about servicehost - I don't see any reference to it related to Windows services.
The Service Control Manager (SCM) provides control over services.

XP service applications run under whatever user account that you set it up to use. They run
in the context of a user account, which can be a built-in account, an account that has been set
up specifically for the service, or any user account.

You can run a service in the context of an account with any priveledges you want.
For safety, the account should have only the priveledges it needs to function.

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Hans Dietrich9-May-07 4:30

9-May-07 4:30

Svchost.exe is the file name for the generic Windows process called Service Host which resides in Windows\System32\. Since it acts as a host, it can collect multiple services together and run them in a common environment. This results in a more efficient arrangement since it reduces boot time and system overhead by eliminating the need to run dozens of separate services, each in their own memory spaces. Different groups of Windows services have different requirements in terms of system access (privilege) and security, which is why separate instances of svchost.exe are needed.

To show just the instances of svchost.exe and the process running under each instance, type this in a CMD window exactly as shown:

tasklist /svc /fi "imagename eq svchost.exe"

Best wishes,
Hans

Roger Stoltz9-May-07 4:42

Roger Stoltz

9-May-07 4:42

I think tasklist requires "WinXP Pro" or "Win 2003 Server".
Perhaps Vista has got it in some standard edition.

An alternative way would be to use Russinovich's Process Explorer[^] to get the same information.

"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown

Hans Dietrich9-May-07 4:46

9-May-07 4:46

Roger Stoltz wrote:
I think tasklist requires "WinXP Pro" or "Win 2003 Server".

You're probably right.

Best wishes,
Hans

Linker error:?

$uresh $hanmugam9-May-07 3:36

$uresh $hanmugam

9-May-07 3:36

Hi all,
I has been created one MFC extension dll called SRecordset.dll that is

my .h file..

#pragma once<br />
#include <afxwin.h><br />
#include <afxdb.h><br />
<br />
class AFX_EXT_CLASS SRecordset : public CObject<br />
{<br />
	DECLARE_SERIAL(SRecordset)<br />
<br />
<br />
public:<br />
	SRecordset(void);<br />
		<br />
public:<br />
	~SRecordset(void);<br />
<br />
protected:<br />
	CStringArray saDataContainer; <br />
    short iNumFldCount; <br />
	long iNumRec; <br />
	int iRecCount; <br />
	int iTotalSize; <br />
	int iRecordState; <br />
	int iLocalIndex; <br />
public:<br />
	BOOL SSOpen(CDatabase &dbConnectedObj,CString sQuery); <br />
	BOOL SSIsOpen(void); <br />
	void SSClose(void);  <br />
public:<br />
	BOOL SSIsBOF(void); <br />
	BOOL SSIsEOF(void); <br />
public:<br />
	void SSGetFieldValue(int iIndex,CString &FldValue); <br />
	short SSGetFieldCount(void); <br />
	long SSGetRecordCount(void); <br />
	long SSGetCurrentRecordCount(void); <br />
public:<br />
	void SSMoveNext(void); <br />
	void SSMovePrevious(void); <br />
	void SSMoveFirst(void); <br />
	void SSMoveLast(void); <br />
public:<br />
	virtual void Serialize(CArchive& ar); <br />
};<br />

I could create dll successfully. But, it won't support to the client application meanwhile that will be thrown linker error only when i call the SSOpen(CDatabase &dbConnectedObj,CString sQuery) function during runtime

part of code of my client app...

void CtestingDlg::OnBnClickedOk()<br />
{<br />
	// TODO: Add your control notification handler code here<br />
<br />
<br />
	CDatabase db;<br />
	CString sIp,sDb,sPwd,sConn,sPort,sUn;<br />
	sIp="192.168.2.17";<br />
	sPort="5432";<br />
	sPwd="fasp";<br />
	<br />
<br />
	try<br />
	{		<br />
	 sConn = "DRIVER={PostgreSQL ANSI};SERVER=" + sIp + ";port=" +          <br />
          sPort + ";DATABASE=" + sPwd + ";UID=" + sPwd + ";PWD=" + sPwd + ";";<br />
	 db.OpenEx(sConn);<br />
	 AfxMessageBox("Success");<br />
	}<br />
	catch(CDBException *e)<br />
	{<br />
	 MessageBox("Database Connection Refused."+e->m_strError,"DataBase  <br />
          Connection Error",MB_OK|MB_ICONERROR);<br />
	 e->Delete();<br />
		<br />
	}<br />
<br />
<br />
	SRecordset set1;<br />
<br />
	set1.SSOpen(db,"select name from master;");<br />
        set1.SSGetFieldCount();<br />
	set1.SSGetRecordCount();<br />
	set1.SSClose();<br />
<br />
	OnOK();<br />
}<br />

Error is.....

testingDlg.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: int __thiscall SRecordset::SSOpen(class CDatabase &,class ATL::CStringT<char,class strtraitmfc_dll<char,class="" atl::chtraitscrt<char=""> > >)" (__imp_?SSOpen@SRecordset@@QAEHAAVCDatabase@@V?$CStringT@DV?$StrTraitMFC_DLL@DV?$ChTraitsCRT@D@ATL@@@@@ATL@@@Z) referenced in function __catch$?OnBnClickedOk@CtestingDlg@@QAEXXZ$0

could you help me please?

Re: Linker error:?

Hans Dietrich9-May-07 3:45

Re: Linker error:? [modified]

9-May-07 3:45

Are you linking with SRecordset.lib?

Best wishes,
Hans

$uresh $hanmugam9-May-07 20:43

$uresh $hanmugam

9-May-07 20:43

yah i already done,but there is an error raised, when i calld only SSOpen() function not other function calls...

void CtestingDlg::OnBnClickedOk()<br />
{<br />
// TODO: Add your control notification handler code here<br />
<br />
<br />
CDatabase db;<br />
CString sIp,sDb,sPwd,sConn,sPort,sUn;<br />
sIp="192.168.2.17";<br />
sPort="5432";<br />
sPwd="fasp";<br />
<br />
<br />
try<br />
{<br />
sConn = "DRIVER={PostgreSQL ANSI};SERVER=" + sIp + ";port=" +<br />
sPort + ";DATABASE=" + sPwd + ";UID=" + sPwd + "WD=" + sPwd + ";";<br />
db.OpenEx(sConn);<br />
AfxMessageBox("Success");<br />
}<br />
catch(CDBException *e)<br />
{<br />
MessageBox("Database Connection Refused."+e->m_strError,"DataBase<br />
Connection Error",MB_OK|MB_ICONERROR);<br />
e->Delete();<br />
<br />
}<br />
<br />
<br />
SRecordset set1;<br />
<br />
set1.SSOpen(db,"select name from master;");<br />
set1.SSGetFieldCount();<br />
set1.SSGetRecordCount();<br />
set1.SSClose();<br />
<br />
OnOK();<br />
}<br />

above the code thrown only one linker error for SSOpen() function...
please help me..

-- modified at 3:22 Thursday 10th May, 2007

Re: Linker error:?

Cedric Moonen9-May-07 3:46

Cedric Moonen

9-May-07 3:46

You need to link to the lib file that is generated with your dll.

Cédric Moonen
Software developer

Charting control [v1.2]

start menu

prathuraj9-May-07 3:31

prathuraj

9-May-07 3:31

how to hide start menu.that was appeared when windows key is pressed.

Hans Dietrich9-May-07 3:35

9-May-07 3:35

Try a global hook.

Best wishes,
Hans

prathuraj9-May-07 6:05

prathuraj

9-May-07 6:05

how to perform global hook.

Hans Dietrich9-May-07 6:56

9-May-07 6:56

First, take a look at this article.

Next, replace the msghook function with code similar to this:

static LRESULT CALLBACK msghook(int nCode, WPARAM wParam, LPARAM lParam)
{
    KBDLLHOOKSTRUCT *pkbhs = (KBDLLHOOKSTRUCT *) lParam;
    BOOL bControlKeyDown = 0;
    switch (nCode)
    {
        case HC_ACTION:
        {
            // Disable the WINDOWS key
            if (pkbhs->vkCode == VK_LWIN || pkbhs->vkCode == VK_RWIN)
                return 1;
            break;
        }
        default:
            break;
    }
    return CallNextHookEx (hHook, nCode, wParam, lParam);
} // msghook

Best wishes,
Hans

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[How not to ask a question]

Rajesh R Subramanian9-May-07 4:43

Rajesh R Subramanian

9-May-07 4:43

Do you want to hide the start menu or disable the windows key on your keyboard?

prathuraj9-May-07 6:04

prathuraj

9-May-07 6:04

hide the popup menu when i press window key

[How not to ask a question]

Rajesh R Subramanian9-May-07 6:48

Rajesh R Subramanian

9-May-07 6:48

You want to hide the menu or do you want the menu to not appear? I am assuming the later is your query. Install a keyboard hook, as Hans Dietrich already said. Look at MSDN for SetWindowsHookEx() function. Remember that your hook procedure code has to reside in a DLL and then you need to load it from an executable.