Re: Dialog in a DLL - C / C++ / MFC Discussion Boards

Blake Miller22-Dec-05 5:37

22-Dec-05 5:37

Just a couple tips.

I have always seen the PAGE_GUARD on something like an 8K block at exactly a 64K boundary of virtual memory.

So, your virtual alloc must occur on a 64K boundary and request an 8K memory block. Try that and then see if you can guard it.

I have not actually tried to ever guard memory, however, I am only reporting what my virtual memory spy utility has always displayed.

No shirt, no shoes, no brains, no service.

Re: Help with VirtualProtectEx()

simkincoder22-Dec-05 16:10

simkincoder

22-Dec-05 16:10

Solved, as in most of the cases is a misunderstanding problem
i used PAGE_GUARD as the flNewProtect parameter of VirtualProtectEx but
msdn says PAGE_GUARD is a modifier for one of the other memory protection
constants like MEMORY_EXECUTE_READWRITE. This actually works:

if(!(VirtualProtect(
meminf.BaseAddress,
meminf.RegionSize,
PAGE_EXECUTE_READWRITE|PAGE_GUARD,
&oldprotect)))

all product of lazzyness.. [zzz]
thanks 4 the help anyway. mmm im interested on that virtual memory spy utility, can you tell me the name? Smile | :)

Re: Help with VirtualProtectEx()

Blake Miller23-Dec-05 5:17

Blake Miller

23-Dec-05 5:17

I wrote the utiity which I have not posted to CP yet. I still need to enumerate the selected process heaps and correlate them with the virtual memory allocations. It will be called AppMemUse once it is posted here.

No shirt, no shoes, no brains, no service.

I need help on a VC++ 2005 express problem!

Mr.Indestructible22-Dec-05 3:26

Mr.Indestructible

22-Dec-05 3:26

Hi all,

I installed the VC++ 2005 Express and started with a very simple program. It compiles but can not be executed: "MSVCP80D.dll can not be found". I re-installed the Express Edition but the problem persists.

Help me please!

Thanks a lot and wish you a Merry Christmas!

Mr. Indestructible

Re: I need help on a VC++ 2005 express problem!

Klerik8222-Dec-05 8:17

Klerik82

22-Dec-05 8:17

I found some links that might help you with your issue... hope this helps:

http://www.codecomments.com/archive292-2005-11-692791.html

http://blogs.msdn.com/michkap/articles/category/8354.aspx

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=142382&SiteID=1

Good luck!

Re: I need help on a VC++ 2005 express problem!

Mr.Indestructible1-Jan-06 5:32

Mr.Indestructible

1-Jan-06 5:32

Thanks Lenny P,

I was not able to tell you earlier that it's kind for helping me. I will go to the links that you gave me.

Happy new year!

M. Indestructible

Save the world!

Dialog in a DLL

Ger Hayden22-Dec-05 2:45

Ger Hayden

22-Dec-05 2:45

When I define a dialog in a dll (MFC) the compiler refuses to recognise the resource ID. Do I have to use COM?

GER

Ger

Re: Dialog in a DLL

Miles Davies22-Dec-05 3:08

Miles Davies

22-Dec-05 3:08

more complicated than you may think.

If you are using a MFC extension DLL then you will need to link the resources of your DLL into the clients resource chain.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_MFCNOTES_TN033.asp[^]

If you are using a bog standard DLL you need to switch the context to that of the DLL using a call to
AFX_MANAGE_STATE(AfxGetStaticModuleState());

before constructing the dialog class. I do this by having a manager class do all the dialog construction/domodal e.t.c. from within the DLL so I can make the manage state call.

This will lead to all sorts of other issues if your dialog is modeless though.

Not the view of my employer

Wrinting as xml

FarPointer22-Dec-05 1:55

FarPointer

22-Dec-05 1:55

Hi All ,
i have some data(raw data) and i want to save those as xml in to hardisk , how do i do it in vc++,can any one help me sending the link or give an idea .

Regards
Farpointer

Re: Writing xml

Sebastian Schneider22-Dec-05 2:18

Sebastian Schneider

22-Dec-05 2:18

I suggest that you read up on MSXML. You still need to read the "raw" data yourself, though - either by reading it into a datastructure or - if its "human readable" - by parsing it into one.

MSXML provides loads of functions to read and write XML files.

There are some other XML libs out there that might be more advanced or sophisticated, but until now, I only had to read a few setting from a file that held some configuration options.

MSXML should be available on most win-boxes, though I am not sure about the relation between windows-version/SP and msxml-release.

With VC7, you could also use the tools provided by the .NET-Runtime, which handles XML pretty well, but would require the .NET Redistributable to be installed on the target system.

If you need further information on XML per se: I think a saw a free EBook on the O'Reilly-Website dealing with XML in general.

Cheers,
Sebastian

--
Contra vim mortem non est medicamen in hortem.

Re: Wrinting as xml

ThatsAlok22-Dec-05 2:20

ThatsAlok

22-Dec-05 2:20

farpointer wrote:
one help me sending the link or give an idea

http://www.codeproject.com/soap/markupclass.asp[^]

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Linker problem

ThatsAlok22-Dec-05 1:44

ThatsAlok

22-Dec-05 1:44

HI EveryBody,
I am facing a problem... i am not able to compile this code.. could any body suggest me work around for following code :-

#include <iostream.h>
typedef int wxCoord ;

template <class T>
class CTextDropTarget
{
private:
     bool (T::*m_pt2CallbackFunc)(wxCoord x, wxCoord y);
public:
     CTextDropTarget(bool (T::*pt2Func)(wxCoord x, wxCoord y));
     virtual ~CTextDropTarget(void);
     virtual bool OnDropText(wxCoord x, wxCoord y);

};

template <class T>
CTextDropTarget<T>::CTextDropTarget(bool ( T::*pt2Func)(wxCoord x, wxCoord y))
{
	m_pt2CallbackFunc=pt2Func;
	
}


template <class T>
CTextDropTarget<T::~CTextDropTarget(void)
{
}


template <class T>
bool CTextDropTarget<T>::OnDropText(wxCoord x, wxCoord y)
{
     return false;
}


class CSACAddressListCtrl
{
	public:
     CTextDropTarget<CSACAddressListCtrl> *m_pDropTarget;
    static  bool OnTextDropTarget(wxCoord x, wxCoord y)
	{
		return x+y;
	}
};

 
void main()
{
    CTextDropTarget* m_pDropTarget = new CTextDropTarget<CSACAddressListCtrl>( &CSACAddressListCtrl::OnTextDropTarget);
 
}

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

-- modified at 8:01 Thursday 22nd December, 2005

Re: Linker problem

toxcct22-Dec-05 2:18

toxcct

22-Dec-05 2:18

dear alok what does the compiler or the linker say ?

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VisualCalc 3.0]

Re: Linker problem

ThatsAlok22-Dec-05 2:22

ThatsAlok

22-Dec-05 2:22

toxcct wrote:
dear alok what does the compiler or the linker say ?

Ohh Sorry!, here is what compiler/linker says Smile | :)

D:\Alok\Test Project\cpp\11.cpp(70) : warning C4800: 'int' : forcing value to bool 'true' or 'false' (performance warning)

D:\Alok\Test Project\cpp\11.cpp(78) : error C2664: '__thiscall 
CTextDropTarget<class CSACAddressListCtrl>::CTextDropTarget<class 
CSACAddressListCtrl>(bool (__thiscall CSACAddressListCtrl::*)
(int,int))' : 
cannot convert parameter 1 from 'bool (__cdecl *)(int,int)' to 'bool (__thiscall CSACAddressListCtrl::*)(int,int)'
There is no context in which this conversion is possible
Error executing cl.exe.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

-- modified at 8:23 Thursday 22nd December, 2005

Re: Linker problem

David Crow22-Dec-05 2:38

David Crow

22-Dec-05 2:38

ThatsAlok wrote:
D:\Alok\Test Project\cpp\11.cpp(70)

I don't see 70 lines in your code snippet. Confused | :confused:

"Take only what you need and leave the land as you found it." - Native American Proverb

Re: Linker problem

ThatsAlok22-Dec-05 2:40

ThatsAlok

22-Dec-05 2:40

DavidCrow wrote:
I don't see 70 lines in your code snippet.

Hai Sir,
while posting code.. I removed blank lines from source code.. actually problem is at this line :-

CTextDropTarget* m_pDropTarget = 
new CTextDropTarget<CSACAddressListCtrl>
( &CSACAddressListCtrl::OnTextDropTarget);

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: Linker problem

toxcct22-Dec-05 2:40

toxcct

22-Dec-05 2:40

this is a compiler error (not a linker one.

it says that it cannot convert a __cdecl function pointer to a __thiscall one...
i don't know why it does happen, but you might try to call a global function thinking it is a class member.

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VisualCalc 3.0]

Re: Linker problem

ThatsAlok22-Dec-05 2:42

ThatsAlok

22-Dec-05 2:42

toxcct wrote:
i don't know why it does happen, but you might try to call a global function thinking it is a class member.

Any other solution!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: Linker problem

Cedric Moonen22-Dec-05 2:54

Cedric Moonen

22-Dec-05 2:54

toxcct wrote:
i don't know why it does happen

It is because the prototypes for a normal function (__cdecl) and a member function of a class (__thiscall) are different. For the class function, an extra parameter is passed implicitely which is the this parameter (in order for the function to be able to know which instance of the class called her).

Two solution: change the function to a global function (which is not really appropriate) or change it into a static function. A static function (member of a class) is shared among all instances of that class thus, it doesn't require the implicit this parameter but this also implies that you cannot use non-static members (functions or variables) of the class.

Re: Linker problem

Cedric Moonen22-Dec-05 3:00

Cedric Moonen

22-Dec-05 3:00

Remove the static keyword from the OnTextDropTarget function in your CSACAddressListCtrl class.

The constructor of your template class expects a member function of your class (template) thus if this function is static, the prototype is different ( see my other post in response to toxcct).

Re: Linker problem

ThatsAlok22-Dec-05 18:59

ThatsAlok

22-Dec-05 18:59

Cedric Moonen wrote:
Remove the static keyword from the OnTextDropTarget function in your CSACAddressListCtrl class.

Hai Cedric,
I know that way... but i am looking for templatized solution... which i believe not that simple Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: Linker problem

Eytukan22-Dec-05 3:19

Eytukan

22-Dec-05 3:19

a question from ALOK??? Unsure | :~

, that should be a real question. Smile | :)

"But your mind is very complex, very tricky. It makes simple things complicated. -- that's its work. And for centuries it has been trained for only one thing: to make things so complicated that your life becomes impossible."- Osho

<marquee scrollamount="1" scrolldelay="1" direction="up" height="10" step="1">
--[V]--

Re: Linker problem

ThatsAlok22-Dec-05 19:37

ThatsAlok

22-Dec-05 19:37

VivekuniQ wrote:
a question from ALOK???, that should be a real question

Why! Isn't I am human being... I have problems too..

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: Linker problem

ThatsAlok22-Dec-05 21:39

ThatsAlok

22-Dec-05 21:39

VivekuniQ wrote:
that should be a real question.

and real answer :-
http://www.codeproject.com/script/comments/forums.asp?msg=1315456&forumid=1647#xx1315456xx[^]

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: Linker problem

S. Senthil Kumar22-Dec-05 3:48

S. Senthil Kumar

22-Dec-05 3:48

Basically what Cedric said. For static functions, the declaration of the pointer to the function does include the classname. So if you had

bool (*m_pt2CallbackFunc)(wxCoord x, wxCoord y);

instead of

bool (T::*m_pt2CallbackFunc)(wxCoord x, wxCoord y);

your code would have worked. If you do have the classname prefixed, you can only pass non-static member functions of T.

Regards
Senthil
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