USING FormatMessage - C / C++ / MFC Discussion Boards

Re: VC++ Linking error to do with += Operator

Rage16-Aug-06 1:42

Rage

16-Aug-06 1:42

What is CStrTemp ? Is it derived from something ?

~RaGE();

I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus

Re: VC++ Linking error to do with += Operator

David Crow16-Aug-06 2:47

David Crow

16-Aug-06 2:47

ajisthekingofpop wrote:
unresolved external symbol...referenced in function "class CString __cdecl operator+(

What does the operator+ method look like?

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Re: VC++ Linking error to do with += Operator

Zac Howland16-Aug-06 4:17

Zac Howland

16-Aug-06 4:17

There are a few problems here.

First, depending on your compiler, some versions of MFC's CString have a hidden class called CStrTemp. Thus, defining your own class with the same name can cause problems (one of the reasons MFC should have put its stuff in a namespace, and the reason you should do the same).

Second, you defined the function as: friend CStrTemp& operator += ( CStrTemp& i, const CStrTemp& s );, but implemented it as template CStrTemp& operator += ( CStrTemp& i, const CStrTemp& s ) (I'm assuming you just mistyped the <> signs and that the template declaration should actually read template<class T>). If you defined the class as a template, that will work, but you will need to declare it similar to the following:

friend CStrTemp<T> operator+=(CStrTemp<T>& i, const CStrTemp<T>& s)

and implement it as

template<class T><br />
CStrTemp<T>& operator+=(CStrTemp<T>& i, const CStrTemp<T>& s) {...}

Put your code in a namespace and fix your template declarations and this should clear some things up.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Re: VC++ Linking error to do with += Operator

Rage16-Aug-06 5:29

Rage

16-Aug-06 5:29

Zac Howland wrote:
some versions of MFC's CString have a hidden class called CStrTemp

Now this is interesting. Thanks for sharing it. Cool | :cool:

~RaGE();

I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus

vbAccelerator Explorer Bar Control

Hesham Desouky15-Aug-06 23:22

Hesham Desouky

15-Aug-06 23:22

hello all
I am searching for MFC XP Explorer Bar like.
I found an OCX control called vbAccelerator Explorer Bar Control

I tried to use this control inside my MFC application but visual studio 2003 didn't extracted all the required interfaces to deal with the control.

I added the control to the project by adding new class from activeX control.

I would like to know how to add this OCX to my MFC project right
Confused | :confused:

your help is so much appreciated

Hesham

DRM question

shadow0115-Aug-06 23:03

shadow01

15-Aug-06 23:03

Hi,

does anyone knows how to or if it is possible to realize an offline DRM?
I mean I would like to give someone the file with limited permission to playback or copy,
but he has limited access to the internet so he isn't always able to connect to license server.
I want to give him the opportunity to use the file even if he is offline, but also keep the file rights(so if he has permission to play for 1 time, he won't be able to play it more then 1 time Smile | :)

).

PS Sorry if this board isn't appropriate for this kind of question.....

Re: DRM question

Mircea Puiu16-Aug-06 23:13

Mircea Puiu

16-Aug-06 23:13

Visit this forum: http://www.gamedev.net/community/forums/topic.asp?topic_id=332216&whichpage=1�[^]

SkyWalker

USING FormatMessage

fx920015-Aug-06 22:57

fx9200

15-Aug-06 22:57

Hello;
in order to get full description of an event located in eventViewer
i used ReadEvetLog to obtain event id and source name ;
i can after read the dll which contains the message description
example for security center is xpsp2res.dll ;

1. i used load library to load the file
2. i used findRessource to find message N° 1800

the second operation fils always ;
i don't know why???

CODE
HMODULE handle;
HANDLE Res;
DWORD dwLongBuff;
char Buffer[MAX_BUFFER_SIZE];
va_list list[10];

handle=LoadLibrary("c:\\windows\\system32\\xpsp2res.dll");
if (handle==NULL) printf("failure to load"); else printf ("loading ok");

HRSRC hrsrc=FindResource(handle,"#1800",RT_MESSAGETABLE);
if (hrsrc==NULL) printf("failure to load2"); else printf ("loading ok2");

dwLongBuff=FormatMessage(FORMAT_MESSAGE_FROM_HMODULE,handle,
1036,4,Buffer,MAX_BUFFER_SIZE,list);

Re: USING FormatMessage

Rage16-Aug-06 1:31

Rage

16-Aug-06 1:31

fx9200 wrote:
the second operation fils always

Does FindResource or FormatMessage fail ?

~RaGE();

I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus

Covert char array to unsined char array

Tuscon15-Aug-06 22:54

Tuscon

15-Aug-06 22:54

Hi Guys,

Can anyone pls tell me how to convert char to unsigned char unstr[1000];

i am trying to do the following,

strcpy(unstr,(unsigned char *)"TESTING");

But i get an comilation error : cannot convert parameter 1 from 'unsigned char [100]' to 'char *'

Pls kindly adivse me

Thanks
Cheers Smile | :)

)

Thank you guys.....
Tuscon.....

Re: Covert char array to unsined char array

Rage15-Aug-06 23:03

Rage

15-Aug-06 23:03

strcpy((char *)unstr,"TESTING");

~RaGE();

I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus

Re: Covert char array to unsined char array

Eytukan16-Aug-06 0:57

Eytukan

16-Aug-06 0:57

_mbsncpy ? Unsure | :~

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

]--

[My Current Status]

Re: Covert char array to unsined char array

Zac Howland16-Aug-06 4:22

Zac Howland

16-Aug-06 4:22

You can also use memcpy instead of strcpy.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

callback in windows service

_tasleem15-Aug-06 22:18

_tasleem

15-Aug-06 22:18

hi all i want to implement windows hooks in service.i had implemented the hooks at the standard application(as DLL) it works fine.but the problem is that it did not worked for the service. i mean callback function is not called when service executed.
tell me what i do. any help is welcomed.

Tasleem Arif

Re: callback in windows service

Milton Karimbekallil15-Aug-06 23:36

Milton Karimbekallil

15-Aug-06 23:36

Nt services are running in a difrent window station and desktop called -Service0x0-3e7$\default. All our applications are under Winsta0\default. So there may not be any applications running with an associated window object to invoke the hooked WindoProc.

Try by changing the service type to SERVICE_INTERACTIVE_PROCESS so that the service will run under Winsta0\default desktop.

cheers...Milton KB

Re: callback in windows service [modified]

_tasleem15-Aug-06 23:56

_tasleem

15-Aug-06 23:56

i think u did not understand my question.
i had implemented hooks as dll and used in desktop application and it works fine.when i use the same dll from service then it did not work i mean setwidows hooks is called and the callback function in response to hook is not called.
and my service is controlled by the SCM and present in services list in the controll panel->admntool->services.
how to do that in i mean changing service type.

-- modified at 6:05 Wednesday 16th August, 2006

Tasleem Arif

Re: callback in windows service

Milton Karimbekallil16-Aug-06 0:43

Milton Karimbekallil

16-Aug-06 0:43

I had understood what exactly u meant. Ur windows hook is not working in a service app while it works fine in a desktop application. This is what I understood before and now as well. The answer is same as before.

Hope you are aware of the fact that the Desktop window is the parent window of all other windows we create using Createwindow() API. Actually this desktop what we are seeing is just one among a number of other desktops which Windows OS keeps invisible(some of them are visible as well. eg: logon desktop). This is a mystery to most of us. Actually there is something called a window station and a window station can have n number of desktops in it. A window station is a secure kernel object that contains a clipboard, a private atom table, a set of desktops, and a set of windows.
see the info http://www.pluralsight.com/wiki/default.aspx/Keith.GuideBook/WhatIsAWindowStation.html[^]

All our applications (including your desktop application what you were talking about) are running under a desktop called Winsta0\default.

But NT Services are running in a different window station and desktop called Service0x0-3e7$\default.

Your hook will not get invoked as there are no windows in the service desktop. So try by changing the service type to SERVICE_INTERACTIVE_PROCESS so that the service will run under Winsta0\default desktop and you will start getting the notifications in the windows hook.

cheers Milton KB

Re: callback in windows service

_tasleem16-Aug-06 1:31

_tasleem

16-Aug-06 1:31

thanks for such a descriptive answer, how can i change the service type to SERVICE_INTERFACTIVE_PROCESS only change the create service paramter to this or had to call different api calls for that purpose.
one thing Thank U very Much Again. Smile | :)

Tasleem Arif

Re: callback in windows service

Milton Karimbekallil16-Aug-06 3:18

Milton Karimbekallil

16-Aug-06 3:18

Yes u can use SERVICE_INTERFACTIVE_PROCESS in ur CreateService call.

cheers..Milton KB

Re: callback in windows service

_tasleem17-Aug-06 2:01

_tasleem

17-Aug-06 2:01

it did not work callback function is not called through this technique as well.i had found an article related to the interactive servies at the codeproject.com here is its link
it was showing the icon in the tray what i did is replace the code of showing icons with the method of calling/registering hook's dll. The func of dll that hook the windows.but it did not work 2.Now i had one method use the timer to check whether it will be called or not.
i dont have any thing in mind what to do next.

Tasleem Arif

How to disable USB Enhanced Host Controller by using VC++ code?

momer15-Aug-06 22:16

momer

15-Aug-06 22:16

Hi! Sir,

You know that we can disable USB Enhanced Host Controller by hand.That is,
right click my computer,select property,select hardware,click Device Manager,
click General Serial Bus Controller,right click USB Enhanced Host Controller,
select Disable,so,we disabled this device.

Now my question is: how to disable USB Enhanced Host Controller by VC code?
Couse i wanna my usb device run under usb1.1 but not usb2.0,so i have to disable
USB Enhanced Host Controller in my vc code before attach my usb device to pc.

Thanks for any help!

All the blesses we enjoy are the fruits of labor,toil,study and self-denail.

problem with LoadFrame

sach!!15-Aug-06 22:06

sach!!

15-Aug-06 22:06

Hi!

While executing a code ported from VC6 to VC8, I an getting unhandled exception. When I debugged my code I found that LoadFrame() is causing a probelm saying::

First-chance exception at 0x104817fd (msvcp80d.dll) in KPVault.exe: 0xC0000005: Access violation writing location 0x0000424b.<br />
Unhandled exception at 0x104817fd (msvcp80d.dll) in KPVault.exe: 0xC0000005: Access violation writing location 0x0000424b.

I am calling LoadFrame as

CMainFrame* pFrame = new CMainFrame;<br />
pFrame->LoadFrame(IDR_MAINFRAME,<br />
		WS_OVERLAPPEDWINDOW | FWS_ADDTOTITLE, NULL,<br />
		NULL);

I checked all my resources named as IDR_MAINFRAME. Those are a String, Menu, Acceralator, Icon and a Toolbar.

VC6 build for the same code runs just fine. Then What is causing this problem??

Thx.

Linker Error

tom groezer15-Aug-06 22:02

tom groezer

15-Aug-06 22:02

Hi,
I'm getting the following linker error while building a project on x64| Debug. There is no problem while build on XP|Debug.The definition of HtmlHelp is found in windowsddk folder in XP. Is there anything I need to do in terams of finding the corresponding definition on x64. In case I do need to where I can get the definition.

<classname>.obj : error LNK2019: unresolved external symbol HtmlHelpA referenced in function "public: int __cdecl <classname>::LinkToHTMLHelp(unsigned long)" (?LinkToHTMLHelp@CTapas@@QEAAHK@Z)
1>Debug/hpqtap08.dll : fatal error LNK1120: 1 unresolved externals

Thanks

Re: Linker Error

Rage15-Aug-06 23:05

Rage

15-Aug-06 23:05

You get this because the function is not defined for 64bit, probably the prototype is surrounded by #ifdef WINxx or something like that. Find where the 64b version is located, and include it.

~RaGE();

I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus

Re: Linker Error

tom groezer16-Aug-06 19:57

tom groezer

16-Aug-06 19:57

The prototype of the function is defined as below in the file htmlhelp.h under winxpsdk/include (SDK code) path.

HWND WINAPI HtmlHelp(
HWND hwndCaller,
LPCSTR pszFile,
UINT uCommand,
DWORD_PTR dwData
);
I dont have the cpp file with me and have no idea which extra lib if any is to be included for the x64 platform to execute the build.

Thanks
Ashutosh

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