Re: C++ and HTML - C / C++ / MFC Discussion Boards

Using a MFC dll from ordinary win32 console application

gixxi8-Nov-04 23:01

8-Nov-04 23:01

I coded a MFC DLL that acts itself as client for some COM server. When I use this MFC DLL within a
MFC application all is running fine. But when using the DLL from within an win32 (with MFC support) console application, I face the runtime error "CoInitialize not called". After that i added a "CoInitialized" call at the start of the win32 application. But then I face a memory access error.

-section of MFC DLL function to call
TaiPanClient* TaiPanClient::create(){
AFX_MANAGE_STATE(AfxGetStaticModuleState( ));
COleException *e = new COleException();

TaiPanClient *_client = NULL;
//do initialized ole support
if(!isOleInitialized){
if(!AfxOleInit()){
cerr << "[error] " << "OLE 2.0 Automation Initilization failed" << endl;
return _client;
}
isOleInitialized = true;
}

//check whether we can get an application handle
try{
ITaiPan *app = new ITaiPan();
if( app->CreateDispatch( APPLICATION_HANDLE ,e ) == TRUE ) {
_client = new TaiPanClient((void*) app);
} else {
cerr << "[error] " << "Cannot attach to COM Server, Version Independent Prog ID TaiPan.Anwendung" << endl;
throw e;
}
} catch(COleException *e){
char str[1000];
e->GetErrorMessage(&str[0], 1000);

cout << "exception thrown " << &str[0] <

Some Introduction About Encode and Decode

Guoguor8-Nov-04 21:59

Guoguor

8-Nov-04 21:59

I want to understand the knowledge of Encode amd Decode,
could you give me some?
Thanks !

Re: Some Introduction About Encode and Decode

Phil J Pearson8-Nov-04 23:55

Phil J Pearson

8-Nov-04 23:55

Encode goes from A to B. Decode comes back.

The opinions expressed in this communication do not necessarily represent those of the author (especially if you find them impolite, discourteous or inflammatory).

Re: Some Introduction About Encode and Decode

David Crow9-Nov-04 3:10

David Crow

9-Nov-04 3:10

Encode, or encrypt, means to convert data or some physical quantity into a given format (e.g., ROT-13). Decode, or decrypt, means to convert code into ordinary language.

For example, before you send a password to someone via e-mail, you would first encrypt it so that it is not easily readable. When the recipient opens your e-mail, they would need to decrypt the password before being able to use it. If my password was saturday and I encrypted it using ROT-13, the result would be fngheqnl.

Make sense?

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

C++ and HTML

bjcee8-Nov-04 21:26

bjcee

8-Nov-04 21:26

How to implement a C++ application on my website?

Re: C++ and HTML

ThatsAlok8-Nov-04 22:28

ThatsAlok

8-Nov-04 22:28

Can you explain your question little more??

what do u want use c++ to write webpages or C++ application run on your webpages to perform some task

Re: C++ and HTML

ThatsAlok8-Nov-04 22:28

ThatsAlok

8-Nov-04 22:28

Can you explain your question little more??

what do u want use c++ to write webpages or C++ application run on your webpages to perform some task

Re: C++ and HTML

BlackDice9-Nov-04 3:11

BlackDice

9-Nov-04 3:11

You can use C++ to write ISAPI extension DLL's which can dynamically write out HTML code for you. You have to change some settings in your IIS, but after you get the hang of it, I think it'll be pretty easy. I did a couple of examples from a book published by SAMS called 'Visual C++ 6 Unleashed'. there's some good examples in there that show you just what to do so that you can just about do your whole website in C++.

If I write code in my sleep, does that make me brilliant, or just a lazy programmer?

My articles

www.stillwaterexpress.com

BlackDice - the programmer formerly known as bdiamond

Private dial-up connection

mickeg8-Nov-04 21:15

mickeg

8-Nov-04 21:15

Hi,
I'm writing an application that helps the user create dial up
connection with some special settings. The problem is that I am using
my own wizard and I need to make it possible for the user to make the
connection private, i.e. setting the owner of the connection to the
user in question. This function should behave in the same way as when
setting "For my use only" in the standard windows wizard. Which API
should I use? Is it the Authorization API, or is there a function in
the RAS API?

How can I Distribute N rectangles into one rectangle in most appropriate manner?

mfc_surfer8-Nov-04 19:59

mfc_surfer

8-Nov-04 19:59

Hi all,

I'm having a frame in a dialog box and I'd like to distribute N rectangles within it in most approprate manner. I'm looking for an algorithm to help me calculate the positions where I should draw the N rectangles.

Any suggestion would be appreciated.

Re: How can I Distribute N rectangles into one rectangle in most appropriate manner?

BlackDice9-Nov-04 3:13

BlackDice

9-Nov-04 3:13

I think you'll have to elaborate a little more. Smile | :)

If I write code in my sleep, does that make me brilliant, or just a lazy programmer?

My articles

www.stillwaterexpress.com

BlackDice - the programmer formerly known as bdiamond

Re: How can I Distribute N rectangles into one rectangle in most appropriate manner?

mfc_surfer9-Nov-04 18:33

mfc_surfer

9-Nov-04 18:33

Sorry! I had forgotten to include the description Smile | :)

I have a frame in a dialog box and I'd like to distribute N rectangles within it in most approprate manner. I mean in a way that it look like they've been put around some circles not just one circle.

Re: How can I Distribute N rectangles into one rectangle in most appropriate manner?

mfc_surfer9-Nov-04 18:33

mfc_surfer

9-Nov-04 18:33

Sorry! I had forgotten to include the description Smile | :)

I have a frame in a dialog box and I'd like to distribute N rectangles within it in most approprate manner. I mean in a way that it look like they'ven been put around some circles not just one circle.

To get current Login User name from within a service.

e_prabhu8-Nov-04 19:53

e_prabhu

8-Nov-04 19:53

Hi,
I have a service (written in C++), running under Windows NT/2K/XP/2003. I need to get the name of the currently logged in user, but most Windows APIs I have found return the username of the *calling thread*, which when run as a system, is always "SYSTEM".

I have tried these APIs so far:

GetUserName()
GetUserNameEx()

Unfortunately, all of the above return the username "SYSTEM". Any suggestions?

This code needs to run on Windows NT, 2000, XP and 2003.

Confused | :confused:

Advance thanks ,

Re: To get current Login User name from within a service.

vilmer8-Nov-04 21:21

vilmer

8-Nov-04 21:21

Hi,

you can try to access the windows register at
\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
and catch the value of Logon User Name key.

To do this use:

HKEY masterKey = HKEY_CURRENT_USER;
CString SubKey = "\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer";
HKEY hKey;

if (RegOpenKey(masterKey,SubKey,&hKey) == ERROR_SUCCESS)

char ValueName[1024]="";
DWORD dwValueNameSize=sizeof(ValueName);
DWORD dwType=REG_NONE;
BYTE Data[1024]="";
DWORD dwDataSize=sizeof(Data);
while (strcmpi(ValueName,"Logon User Name") != 0)
{
LONG Result=RegEnumValue(hKey, dwIndex, ValueName,
&dwValueNameSize, 0, &dwType, Data, &dwDataSize);
dwIndex++;
}

---

You will get the user logon on ValueName string

For furhter details see also

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/sysinfo/base/regenumvalue.asp

Re: To get current Login User name from within a service.

ThatsAlok8-Nov-04 22:36

ThatsAlok

8-Nov-04 22:36

vilmer wrote:
you can try to access the windows register at
\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
and catch the value of Logon User Name key.

Your Approch is right,but from the service this approach is wrong.if you try to open HKEY_CURRENT_USER from service instead of opening of that it open HKEY_USER/.Default. you can try. because sevices start before logon,on logon OS decide which is current user whihc registry setting he is going to use.

now question arise how to open the current user from service
solution is right there HKEY_USERS\{Current Logon USER SID}\is TRUE replica for HKEY_CURRENT_USER

-----------------------------
"I Think It Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

Re: To get current Login User name from within a service.

ThatsAlok8-Nov-04 22:36

ThatsAlok

8-Nov-04 22:36

Re: To get current Login User name from within a service.

ThatsAlok8-Nov-04 22:39

ThatsAlok

8-Nov-04 22:39

i have a suggestion.
u can write a WinLogon.dll for knwoning this.
to known more about winlogon dll ,there is nicely written article in MFC/C++/System Section over it.

-----------------------------
"I Think It Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

Re: To get current Login User name from within a service.

David Crow9-Nov-04 2:36

David Crow

9-Nov-04 2:36

e_prabhu wrote:
I have a service (written in C++), running under Windows NT/2K/XP/2003. I need to get the name of the currently logged in user

I assume you know that a service can make no assumptions about whether a user is logged in or not.

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

Re: To get current Login User name from within a service.

2249179-Nov-04 4:56

224917

9-Nov-04 4:56

the information returned "SYSTEM" is right since by default a service loggs in as "SYSTEM". This you can change using SCM.

To get information on intractively logged on user information you will have to use a different set of APIs.This is where you have to start for that http://msdn.microsoft.com/library/default.asp?url=/library/en-us/secauthn/security/enumerating_logon_sessions.asp

There is no spoon.

mail

Installation and uninstallation application

Rajesh_K_Sharma8-Nov-04 18:23

Rajesh_K_Sharma

8-Nov-04 18:23

Hi all,
I am sorry if this is a stupid question.
I would like to write a application using vc++.
Can I do some thing in my application which restricts the user to install or uninstall any application/ software from the system . I know about failing a write or create operation . But that I guess will be a disaster.

So could it be some thing like we have some process or thread which is only used for installations and uninstallations- and I fail that.

Any ideas ??

Thanks in advance.

rajesh

Re: Installation and uninstallation application

includeh109-Nov-04 2:06

includeh10

9-Nov-04 2:06

i suggest you learn how to develop Virus first.
or search on the internet for this tech.

aaa

Handling of resizing the view and controls for different screen resolutions

ledallam8-Nov-04 17:23

ledallam

8-Nov-04 17:23

Hello,

I am working with MDI application in VC++. My view is derived from CFormview. I have many controls on the form view. When I resize the form view, all my controls should be resized and this should work for different screen resolutions.

Can anyone please help me in doing this. Thanks in anticipation of information.

Madhavi

Question about random access file.

momer8-Nov-04 16:45

momer

8-Nov-04 16:45

To test different cardreaders,I wrote a program to do the write/read data test.At first,copy a file of certain size form Harddisk to the cards,and then read the file form every card(s) and campare the data with the source file data.According to the capacity of each
card,I should choose comparative file size from a ComboBox,such as 1MB,32MB,64MB,512MB,1GB,ect.Amd what's more,I can not know what the number my user will input to the ComboBox.So,my question is:If there is a way to let me read 1GB(or some other number>1MB) data from a file(size more small and more better.)?
Thanks!

Re: Question about random access file.

David Crow9-Nov-04 2:49

David Crow

9-Nov-04 2:49

momer wrote:
If there is a way to let me read 1GB(or some other number>1MB) data from a file(size more small and more better.)?

Yes, but it's doubtful you can do it all at once (the memory manager is not going to be able to allocate that much contiguous RAM). I would recommend reading it 1MB at a time.

I've not tried it, but I think you can quickly create a file of size N by calling SetFilePointer(..., N, NULL, FILE_END) followed by SetEndOfFile().

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

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