C / C++ / MFC Discussion Boards

Anurag Gandhi1-Aug-07 22:25

1-Aug-07 22:25

You are right toxcct.

Well, no one (I am talking about non-stupid guy) is editing the Registry information unless it is clearly known to him that what exactly he is doing. Or they are taking the backup of the registry before editing.
About readability, configuration setting is not a NASA project that needs to be so secure.

Anurag Gandhi.
http://www.softgandhi.co.nr

Re: Avoid using .ini files

Anurag Gandhi1-Aug-07 22:17

Anurag Gandhi

1-Aug-07 22:17

Whatever you are doing, ultimately you are saving the information in the hard disk in one way or the other.

I may be a Registry Database, Sql server database, an XML file, a text file format or ini file.
I will suggest use windows registry because it is very easy to use. Don't waste your time and energy in thinking about these logics unless your requirement is completely different and registry can't serve the purpose.

Anurag Gandhi.
http://www.softgandhi.co.nr

Re: Avoid using .ini files

#realJSOP1-Aug-07 23:48

#realJSOP

1-Aug-07 23:48

You could encrypt the ini file after it's written, and decrypt it before it's read.

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

Re: Avoid using .ini files

Mark Salsbery2-Aug-07 8:49

Mark Salsbery

2-Aug-07 8:49

There's nothing necessarily wrong with INI files.

Where you put the file is an issue these days.

With a secure system, your app's directory should not be accessible to a non-administrator
user. Same with the registry, particularly the HKEY_LOCAL_MACHINE tree where you'd put
configuration settings for all users.

The recommended method these days is to use a configuration file (INI is fine, XML is fashionable)
and store it in an appdata/common appdata folder

(e.g. C:\Documents and Settings\All Users\Application Data\<company name>\<product name>\<product version>\)

There are Shell APIs available to retrieve paths of these common directories.
Your app's data folder can be set to allow access by all users at install time.

This is detailed in the Windows Logo requirements.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

how to rebuild scilexer.dll after adding new language

mirraa1-Aug-07 20:39

mirraa

1-Aug-07 20:39

hi...

i have developed a MFC application of syntax colorising editor from the procedure given here(by using scintillawnd class and from dll SciLexer.dll),but i want to use it for my own language for which lexer is not available.
so have added a new cpp file(Lexxxx.cxx) to scitilla/src directory.

now..problem is how i have to link with this SciLexer so that it work for my own language,and how i have to rebuild SciLexer.dll .

plase any one help to solve out this problem..

i have gone through the documentation ...but i cant understand the procedure given there...please help me..

please help...thanx in advance

assembly question

samira forooghi1-Aug-07 19:50

samira forooghi

1-Aug-07 19:50

hi every one
do you know how can emplement interrupts in windows whit assembly?

Re: assembly question

Hamid_RT1-Aug-07 20:24

Hamid_RT

1-Aug-07 20:24

Do you want to use assembly on c++ like this:
__asm
{
move al,2
}

WhiteSky

Re: assembly question

Peter Weyzen1-Aug-07 21:04

Peter Weyzen

1-Aug-07 21:04

__asm int 3;

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<A HREF="http://www.soonr.com">SoonR Inc -- PC Power delivered to your phone</A>

template [modified]

nitin31-Aug-07 19:42

nitin3

1-Aug-07 19:42

template<typename V>
class num
{
IMP_EXP __stdcall num() ;
IMP_EXP __stdcall ~num() ;

IMP_EXP __stdcall Print( V Val ) ;
}

template< typename V> IMP_EXP __stdcall num< V >::num()
{
}

template< typename V> IMP_EXP __stdcall num< V >::~num()
{
}

template< typename V> IMP_EXP __stdcall num< V >::Print( V Val )
{
printf( "%d" , Val ) ;
}

//// dll
i put the following code on a dll that exprts this class members.

/////exe

void main()
{
num <long> obj ;
obj.Print( 10 ) ;
}
////
i tried to import it from exe then the compiler displays error 2019 : unresolved external symbol.. this is my first template program.
one more question is this syntax are correct ?

how to solve this problem ?
plz help me

-- modified at 1:50 Thursday 2nd August, 2007

Re: template

mandanani1-Aug-07 20:40

mandanani

1-Aug-07 20:40

Seems like the template code is right.
executable can not identify the functions of dll. Did you added respective lib file Projects > Settings > Link > Object/Library modules. And include the header file and place the dll in the same path as exe.

Hope this might help Smile | :)

Re: template

nitin31-Aug-07 20:59

nitin3

1-Aug-07 20:59

ive included the header file and ilb correctly. other classes imported from that dll are working .. i think the problem is exporting ..

Re: template

mandanani1-Aug-07 21:23

mandanani

1-Aug-07 21:23

I think the problem is including the template in the dll itself Smile | :)

A template generates code when it is instantiated. So, how are you going to put that inside the DLL?
If you are distrubuting template, write both declaration and definition in one header file, and just share it across projects. No need of dll and lib Smile | :)

Hope I make sense here!!!

Re: template

Michael Dunn2-Aug-07 8:22

Michael Dunn

2-Aug-07 8:22

See [35.15] How can I avoid linker errors with my template classes?[^]

--Mike--
Visual C++ MVP Cool | :cool:

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Hungarian notation FTW

CFileDialog Double Click Problem

listechtony1-Aug-07 19:27

listechtony

1-Aug-07 19:27

When the CFileDialog class is created for a File Open operation, the user can double click in the list view to either select a file or change directories. Before the class processes the double click to perform one of these functions, how can I intercept this double click event?

I have tried to use a message map of ON_WM_LBUTTONDBLCLK(), but the code still never hits the CMyFileInputDlg::OnLButtonDblClk(UINT nFlags, CPoint pt) function. What am I missing?

Re: CFileDialog Double Click Problem

Anurag Gandhi1-Aug-07 20:40

Anurag Gandhi

1-Aug-07 20:40

To catch the event of CFileDialog, you need to create your own Class with the base class of CFileDialog.

There, you can override the event handlers or functions and can do whatever you want.

Creating your own Dialog is also a solution if your purpose is very specific.

Anurag Gandhi.
http://www.softgandhi.co.nr

Re: CFileDialog Double Click Problem

listechtony1-Aug-07 20:47

listechtony

1-Aug-07 20:47

I have actually done that, but it still does not trigger the double click event.

CMyFileInputDlg::CMyFileInputDlg(CWnd* pParent/* = NULL*/)
: CFileDialog(TRUE, NULL, NULL, OFN_EXPLORER | OFN_ENABLEHOOK | OFN_HIDEREADONLY | OFN_ENABLEINCLUDENOTIFY | OFN_SHOWHELP , NULL, pParent)

I still wish to use the base CFileDialog class.

Re: CFileDialog Double Click Problem

Roger Broomfield1-Aug-07 22:11

Roger Broomfield

1-Aug-07 22:11

from the MSDN Library "The hook procedure does not receive messages intended for the standard controls of the default dialog box. You can subclass the standard controls, but this is discouraged because it may make your application incompatible with future versions."
This means you can't do any processing in response to the double click event, without jumping through hoops that are not recommended. What you can do is provide handlers for :-
CMyFileInputDlg::OnLBSelChangedNotify
CMyFileInputDlg::OnFileNameChange
CMyFileInputDlg::OnFolderChange
CMyFileInputDlg::OnFileNameOK

Re: CFileDialog Double Click Problem

listechtony2-Aug-07 15:49

listechtony

2-Aug-07 15:49

Roger,

Thanks for this. The evidence suggests that this is what is happening. If I use the Old Style rather than Explorer style, I may catch the double click event? It still doesn't seem to work though.

Re: CFileDialog Double Click Problem

Hamid_RT1-Aug-07 21:18

Hamid_RT

1-Aug-07 21:18

Did you use of OFN_ENABLEHOOK and did you set lpfnHook ?
From the MSDN:
"If the OFN_EXPLORER flag is not set in the Flags member, lpfnHook is a pointer to an OFNHookProcOldStyle hook procedure that receives messages intended for the dialog box"

WhiteSky

Re: CFileDialog Double Click Problem

listechtony2-Aug-07 15:47

listechtony

2-Aug-07 15:47

Yes, I did. I have the OFN_EXPLORER flag set, but all I was getting was the WM_NOTIFY message. This message doesn't notify of a double click, rather whether a file was selected, or a folder. I need the double click event.

Re: CFileDialog Double Click Problem

Hamid_RT2-Aug-07 22:40

Hamid_RT

2-Aug-07 22:40

I was working and searching for your question but I couldnt find an answer for it for example on this[^] thread someone asked like your question and it seems that he got an answer but I couldnt work with that answer.

WhiteSky

How to expose BYTE pointer in ActiveX Control

yaminisridaran1-Aug-07 17:51

yaminisridaran

1-Aug-07 17:51

I have to expose a BYTE pointer from activex control to exe. but I am not able to do that .can anyone help me.

S.Yamini

Re: How to expose BYTE pointer in ActiveX Control

Randor 1-Aug-07 21:14

Randor

1-Aug-07 21:14

How many BYTES does the host executable need to access? The safe 'COM way' of doing this (if there are only a few bytes) might look something like this:

						SAFEARRAY *pArrayVal = pdispparams->rgvarg[0].parray;<br />
<br />
						if(NULL != pArrayVal && 0 < pArrayVal->rgsabound[0].cElements)<br />
						{<br />
							BYTE *pBytes = new BYTE[pArrayVal->rgsabound[0].cElements];<br />
<br />
							if(NULL != pBytes)<br />
							{<br />
								char HUGEP *pArray = NULL;<br />
								HRESULT hr = SafeArrayAccessData(pArrayVal, (void HUGEP * FAR *)&pArray );<br />
<br />
								if (SUCCEEDED(hr))<br />
								{<br />
									memcpy(pBytes, pArray, pArrayVal->rgsabound[0].cElements);<br />
									SafeArrayUnaccessData(pArrayVal);<br />
									m_owner->FireEvent(pdispparams->rgvarg[1].lVal,pBytes,pdispparams->rgvarg[1].lVal,pArrayVal->rgsabound[0].cElements,1);<br />
								}<br />
							}<br />
							delete[] pBytes;<br />
						}

Essentially, you would send a copy of the bytes. If there is a very large amount of bytes to be copied or high performance was required then this method would be inferior.

Hope this helps,
-Randor (David Delaune)

PCH files the answer fo Mixing C++ and C

ForNow1-Aug-07 16:52

ForNow

1-Aug-07 16:52

Is creating a PCH file out of C header the answer to including a C header in C++ code?????

thankx

Re: PCH files the answer fo Mixing C++ and C

Mark Salsbery1-Aug-07 17:09

Mark Salsbery

1-Aug-07 17:09

You can include a "C header" the same way you include any header file.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

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