C / C++ / MFC

Re: Vc++ hardware control classes?

14-Jun-06 20:43

Seehttp://www.wotsit.org[^]
http://www.codeproject.com/system/[^]
maybe it is some helpful to you

whitesky

John R. Shaw15-Jun-06 1:34

John R. Shaw

15-Jun-06 1:34

You are dealing with a security problem. I say this because you are talking about accessing the hardware and I assume that you mean directly. If you want to access the hardware then you need to call a driver to do it for you. On systems like Win2000 and XP you can not access the hardware directly (even in assembly) without it getting upset with you. It does not matter whether or not you are using VC++ or not, it is an OS thing. There is a public domain diver out there some where that will allow you to access hardware ports directly, I used it a couple of years ago and forget its name (so keep looking).

If you post a small example of the problem (in code) or explane what exactly you are trying to do, then someone here will probably be able to help you.

Good Luck,

INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra

Using ShellExecute

<color>Aljechin 14-Jun-06 20:14

<color>Aljechin

14-Jun-06 20:14

I have two questions.

1. How do I use ShellExecute inside my MFC program to register an activex control, say MyControl.ocx located at D:\MyFolder?

2. I do not want it to be in the hard disk, but would like to include the activex control within my program as a resource and then I want to register it. I imported it as a resource. How can I proceed?

Regards,
Aljechin Alexander

Rose | [Rose]

NiceNaidu14-Jun-06 20:33

NiceNaidu

14-Jun-06 20:33

Use DllRegisterServer

Check this article for some help.

http://www.codeproject.com/macro/openvc.asp?df=100&forumid=1254&exp=0&select=809393[^]

Appu..
"If you judge people, you have no time to love them."

David Crow15-Jun-06 3:00

David Crow

15-Jun-06 3:00

NiceNaiduUse DllRegisterServer

Exactly how is this of any help outside of the ActiveX file?

"The largest fire starts but with the smallest spark." - David Crow

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

Milton Karimbekallil14-Jun-06 21:36

Milton Karimbekallil

14-Jun-06 21:36

1) u can use ShellExecute(NULL, NULL, "regsvr32.exe", <path to="" ocx="">, NULL, SW_HIDE);

2) you cant keep an ocx in the resourse and use it if you are doing static linking. if u are doing only dynamic lnking then, one thing you can do is to store the binaries from reourse into the harddisk and register from there.

cheers..milton kb

Hamid_RT14-Jun-06 21:49

14-Jun-06 21:49

See ShellExecute[^]

whitesky

David Crow15-Jun-06 3:05

David Crow

15-Jun-06 3:05

Aljechin wrote:

1. How do I use ShellExecute inside my MFC program to register an activex control, say MyControl.ocx located at D:\MyFolder?

While you can use ShellExecute() or CreateProcess() for this, you could also use LoadLibrary() and GetProcAddress() to call the exported DllRegisterServer() function.

"The largest fire starts but with the smallest spark." - David Crow

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

<color>Aljechin 15-Jun-06 20:06

<color>Aljechin

15-Jun-06 20:06

Halo sir,

I went through your article which demonstrates the usage of UpdateResource(). Nice one. But from that I am unable to understand how do I do the same when I have imported it as a Binary resource into my MFC app. Its like I have an activeX DLL imported as a binary resource and it is a part of my executable now. I need to register the control to any machine on which the executable is run. I have understood that I could do it with ShellExecute() But I do not know how to use this resource!! Is copying this data to a file on the machine and registering it the only possible way? Can I not register it from within my program itself without copying this binary and creating a replica of the actual file?

Thanks for your help.
Aljechin.

Rose | [Rose]

how to type cast from CString to int [modified]

David Crow16-Jun-06 2:37

David Crow

16-Jun-06 2:37

Aljechin wrote:
Is copying this data to a file on the machine and registering it the only possible way?

It's the only way that I am familar with.

"The largest fire starts but with the smallest spark." - David Crow

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

yogendra kaushik14-Jun-06 19:58

yogendra kaushik

14-Jun-06 19:58

please any ont tell me how to type cast from CString to int
actually i receive the value from user and the value is int type but
i used its datatype CString now for futhure operation i want to typecast it
to int .
so plz tell me how i convert it.

Please mail me

-- modified at 2:04 Thursday 15th June, 2006

Laxman Auti14-Jun-06 20:02

Laxman Auti

14-Jun-06 20:02

yogendra kaushik wrote:
please any ont tell me how to typa cast from CString to int
i get the CString type value from user now i want to convert it in to int
for any use so plz tell me how i convert it.

here is one way

int i=atoi(str.GetBuffer());<br />
str.ReleaseBuffer();

Knock out 't' from can't,
You can if you think you can
Cool | :cool:

Stephen Hewitt14-Jun-06 20:54

Stephen Hewitt

14-Jun-06 20:54

Calling GetBuffer and ReleaseBuffer is completely unnecessary. The following will work:

CString FName = "10";
int n = atoi(FName);

It works because CString has an operator LPCTSTR.

Steve

Laxman Auti14-Jun-06 22:43

Laxman Auti

14-Jun-06 22:43

Stephen Hewitt wrote:
Calling GetBuffer and ReleaseBuffer is completely unnecessary

Ohh...
GetBuffer and ReleaseBuffer is mostly used where you want to modify data of the CString instead of Format.

Knock out 't' from can't,
You can if you think you can
Cool | :cool:

Amar Sutar14-Jun-06 20:03

Amar Sutar

14-Jun-06 20:03

Use _ttoi() function

Amar Smile | :)

NiceNaidu14-Jun-06 20:10

NiceNaidu

14-Jun-06 20:10

Try this way.

CString strInteger(_T("302"));<br />
int iValue = _ttoi(strInteger);

i value will be 302

Appu..
"If you judge people, you have no time to love them."

Hamid_RT14-Jun-06 20:28

14-Jun-06 20:28

of course you find your answer in atoi and... but see this link i think its goodConverting numeric types to strings and strings to numeric types[^]

whitesky

Windows Service & CDatabase

John R. Shaw15-Jun-06 1:56

John R. Shaw

15-Jun-06 1:56

You have recieved several answers to your question and they all show you how to convert a string to integer. Take note that this is not type casting, it is conversion from one form to another. This is important because you could type cast a string to an integer value but the value would not be the value entered in the string. It would take the individule byes and assume they are parts of the final number you are seeking.

char str = "AB"; // 'A' = 0x41, 'B' = 0x42
short n = (short*)(str); // n = 0x4241 = 16961

If you are wondering about the reversal of the numbers durring the type casting, then you need to go look up big endian and little endian on the Web.

INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra

vikramlinux14-Jun-06 19:44

vikramlinux

14-Jun-06 19:44

Hi guys !
In windows service code
I have following code in function void CServiceModule::Run()

CDatabase DB;
try
{
if( !DB.IsOpen() )
DB.Open("PrinterDB");

}
catch( CDBException* e )
{
char Buffer[256]="";
AfxMessageBox(e->m_strError);
}

DB.Close();

here PrinterDB is the name of my DSN pointing to an MDB file.
Now when I run it as normal executable it works properly.
but When I run it as service (from MMC start service) connect to DB fails.
Please help me...

Re: Windows Service & CDatabase

NiceNaidu14-Jun-06 20:18

NiceNaidu

14-Jun-06 20:18

vikrams wrote:
from MMC start service) connect to DB fails

Check this link..This should help you.

http://support.microsoft.com/default.aspx?scid=kb;en-us;288129[^]

Appu..
"If you judge people, you have no time to love them."

Re: Windows Service & CDatabase

Milton Karimbekallil14-Jun-06 21:42

Milton Karimbekallil

14-Jun-06 21:42

this is a security related issue.
what rdbms u r connecting to?
what kind of authentication you used in ur dsn?

cheers..milton kb

Re: Windows Service & CDatabase

vikramlinux14-Jun-06 22:55

vikramlinux

14-Jun-06 22:55

I am connecting to Microsoft MS acess database (mdb file.) . It says
try
{
// My code
}

catch( CDBException* e )
{
::OutputDebugString("CDatabase incorrect");
char Buffer[256]="";
AfxMessageBox(e->m_strError);
}

Error

"Data source name not found and no default driver specified"

flex and bison with visual c++ [modified]

c0714-Jun-06 19:37

c07

14-Jun-06 19:37

how can we use flex and bison with visual c++
any tutorial and documentation....

-- modified at 1:41 Thursday 15th June, 2006

Re: flex and bison with visual c++

Hamid_RT14-Jun-06 19:44