C / C++ / MFC Discussion Boards

Rickard Andersson²⁰26-Dec-01 10:24

26-Dec-01 10:24

Ok, now I want to know what COM is!!
Or I just want to make it clear, my thought is that a COM -> OBJECT <- is a varible:

CAClass com; // COM object???

No, I don't think so...

What HOW do I make a COM object for example??
I don't realy know how it looks like! Frown | :(

(

------------------------------
©0d3 ©®4©k3® - That's me! Smile | :)

------------------------------

Re: COM?

Nemanja Trifunovic26-Dec-01 10:34

Nemanja Trifunovic

26-Dec-01 10:34

Rickard Andersson wrote:
Or I just want to make it clear, my thought is that a COM -> OBJECT <- is a varible:

CAClass com; // COM object???

No, I don't think so...

VERY simplified:

<br />
class COMInterface<br />
{<br />
public:<br />
virtual method1 = 0;<br />
virtual method2 = 0;<br />
};<br />
<br />
class COMCoClass: public COMInterface<br />
{<br />
method1;<br />
method2;<br />
}<br />
<br />
int main(void)<br />
{<br />
...<br />
COMInterface* pInterface;<br />
// call CoCreateInstance, or something like that<br />
...<br />
pInterface->method1;<br />
...<br />
}<br />
<br />

I vote pro drink Beer | [beer]

Re: COM?

Michael Dunn26-Dec-01 14:36

Michael Dunn

26-Dec-01 14:36

http://www.codeproject.com/com/comintro.asp

--Mike--
My really out-of-date homepage
Buffy's on. Gotta go, bye!
Sonork - 100.10414 AcidHelm
Big fan of Alyson Hannigan.

VB and COM

Mazdak26-Dec-01 8:17

Mazdak

26-Dec-01 8:17

I have general question about COM developing in VB.
Does Visual Basic have something like ATL for COM developing(except ActiveX)?(I mean something like "simple object"in ATL)
VB doesn't have pointers ,so How does it implement interfaces,methods and another things in COM.
Are COMs that design in VB as strong as,as fast as or... COMs that in ATL have?

Re: VB and COM

Carlos Antollini26-Dec-01 8:36

Carlos Antollini

26-Dec-01 8:36

When you make a com object in something named VB, you not write the IDL. The interface is generated by the VB compiler...
In same mode is easy to write com objects in VB, but the problem is that you don't have the control like in ATL projects when you write the IDL file...

Best Regards...

Carlos Antollini.
Sonork ID 100.10529 cantollini

Re: VB and COM

Nemanja Trifunovic26-Dec-01 9:01

Nemanja Trifunovic

26-Dec-01 9:01

Everything in VB 4/5/6 is COM. If you create a new project as an ActiveX DLL or ActiveX EXE, you will have COM servers, and all you need to do is to fill in the methods you want. Everything else is done by the compiler.

However, COM servers created with VB depend on VB runtime, and they can never be lean and fast as ATL created.

I vote pro drink Beer | [beer]

Read/Write Com Port :: C++

valikac26-Dec-01 6:06

valikac

26-Dec-01 6:06

Hi.
Is it easy to read from and write to the com port using C++? Is there a library for it?

Thanks,
Kuphryn

Re: Read/Write Com Port :: C++

Hadi Rezaee26-Dec-01 9:49

Hadi Rezaee

26-Dec-01 9:49

Try CreateFile or OpenFile API functions ...

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Re: Read/Write Com Port :: C++

valikac26-Dec-01 14:16

valikac

26-Dec-01 14:16

Okay. Thanks.

Felix posted a reply at Programmer's Heaven and mentioned functions:

inp();

and

outp();

http://www.programmersheaven.com/msgboard/read.asp?Board=3&MsgID=93124&Setting=A9999F0001

Those functions are from conio.h. What do you think about those functions?

Kuphryn

Re: Read/Write Com Port :: C++

Mattias Wahlberg26-Dec-01 20:20

Mattias Wahlberg

26-Dec-01 20:20

kuphryn wrote:
inp();

and

outp();

http://www.programmersheaven.com/msgboard/read.asp?Board=3&MsgID=93124&Setting=A9999F0001

Those functions are from conio.h. What do you think about those functions?

They are old and you are probably better of using a modern class-library or perhaps an Active-X component like GreenLeaf CommX. I am in no way connected to Green Leaf but I have successfully used thier products for 10 years on all OS:es from DOS, OS/2 to Windows 3.11/95/NT/2000. Their site is at http://www.gleaf.com/

--
Mattias Wahlberg
IDNet

Re: Read/Write Com Port :: C++

Hadi Rezaee27-Dec-01 21:08

Hadi Rezaee

27-Dec-01 21:08

Hi,
Unfortunly, thease functions can't works on Win NT !

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Re: Read/Write Com Port :: C++

Eugene Pustovoyt26-Dec-01 19:21

Eugene Pustovoyt

26-Dec-01 19:21

On this site there are some libraries for work with CommPort.

1. Ramon de Klein's Serial library for C++
2. PJ Naughter's CSerialPort v1.03 - Serial Port Wrapper
(or better on your site, there the newest version).

Personally I use the second!

Best regards,
Eugene Pustovoyt

Sonork ID 100.10002:Yaumen

Diferences: MFC and Non-MFC

valikac28-Dec-01 5:41

valikac

28-Dec-01 5:41

Hey.

I read Ramon de Klein's description of Serial library for C++. It sounds good.

PJ Naughter's class is a for MFC.

What is the difference between, say, Klein's class and Naughter's class?

What is the advantage of using MFC and not non-MFC?

Kuphryn

Re: Read/Write Com Port :: C++

valikac27-Dec-01 6:57

valikac

27-Dec-01 6:57

Okay. I appreciate it. Thanks everyone.

Kuphryn

Re: Read/Write Com Port :: C++

valikac27-Dec-01 7:02

valikac

27-Dec-01 7:02

C++ Style:

ifstream readCOM;
readCOM.open(com1, ios::in | ios::binary)

char *ptrStore;

try
{
ptrStore = new char[SIZE];
}
catch (bad_alloc error)
{
cerr << error.what();
exit(1);
}

readCOM.read(reinterpret_cast<char *=""> (ptrStore), SIZE);

How do you get the exact size of whatever you're reading from the COM port? It is not a measurable storage container.

Do I have to use an MFC class? What is the major difference if I were to use the ifstream and ofstream instead of an MFC class? I have no experience with MFC or windows programming.

Kuphryn

CFtpConnection...

26-Dec-01 4:35

How can I use the "CInternetFile::Read()" or "CInternetFile::Write()" to copy a file from a FTP server to a local machine ?
Could anybody gives me some code sample ?

Re: CFtpConnection...

Carlos Antollini26-Dec-01 4:55

Carlos Antollini

26-Dec-01 4:55

CInternetFile* pIntFile;

pIntFile 
 = ftpConn.OpenFile("MyFile.txt", GENERIC_WRITE, FTP_TRANSFER_TYPE_ASCII);

pIntFille->WriteString("My Data");
pIntFille->Flush();
.
//Continue writting...
.
pIntFile->Close();

Best Regards...
Green Alien | [Alien]

Chau, and good luck

Carlos Antollini.
Sonork ID 100.10529 cantollini

How to get version of file which i selected

Chanda.com26-Dec-01 3:33

Chanda.com

26-Dec-01 3:33

hello
i want some help...
i have developed an application & used file open dlg box to select a specific file can u please tell me how to get version of that specific file in form of string....
thanking u
chanda.com Confused | :confused:

Problem with refreshing a dialog box

26-Dec-01 3:33

Hello every body,

I implemented a dialog base application, but sometime(when my
application swap), my dialog box do not refreshed itself after another window slides
on it.

Is anybody know how can i correct this problem?

Thanks for help.

S.

Re: Problem with refreshing a dialog box

Prashanth Uppunda26-Dec-01 4:18

Prashanth Uppunda

26-Dec-01 4:18

I hope I understood your problem correctly.
If you are doing a lenghty process in your application, you can write & call the following function in between the lenghty process, so that the window getts refreshed.

void ProcessMessage()
{
MSG msg;
if(::PeekMessage( &msg, NULL, 0, 0, PM_REMOVE ))
{
::TranslateMessage(&msg);
::DispatchMessage(&msg);
}
}

However the best way to avoid these problems, I feel is by creating thread for the lenghty process.

Prashanth

Urgent!!!!!!!!!!!!!!!!!please help how i prevent my vc++ appliaction to kill from taskmanager

Ibrar Ahmad26-Dec-01 3:07

Ibrar Ahmad

26-Dec-01 3:07

please help how i prevent my vc++ appliaction to kill from taskmanager.if it not possible then i have senn application when i killed they again restart how.

Ibrar Ahmad
Softare Engr.
Comcept PVT LTD.
Islamabad
abrar_@yahoo.com

Re: Urgent!!!!!!!!!!!!!!!!!please help how i prevent my vc++ appliaction to kill from taskmanager

Carlos Antollini26-Dec-01 3:37

Carlos Antollini

26-Dec-01 3:37

I had the same problem. For that I made a service, that test the applications that are running. If I detect that one application of my list is killed, I restart again, the application. didn't find another solution...
Best Regards...

Carlos Antollini.
Sonork ID 100.10529 cantollini

Re: Urgent!!!!!!!!!!!!!!!!!please help how i prevent my vc++ appliaction to kill from taskmanager

26-Dec-01 4:18

u can solve it by writing a service and when u r processs is killed by os just create another instance...i think there is some other ways to prevent ur program in the hand of os..

just tr the first one

best luck..
renjith

Dialog based IRC client

Ashman26-Dec-01 0:32

Ashman

26-Dec-01 0:32

Righty I have the source code to a MFC IRC client using the Document architecture....Mainframe() crap etc. I want to do the same thing but have it on a dialog app cos I hate the windowed based programs...here is the link:

http://www.vchelp.net/source/irc_class.zip

if someone can make this into a dialog based app I would be most appreciative and ill give them hosting, email address @ settlers.net...anything (bar my girlfriend Big Grin | :-D

)

Thanks
Ashley 'Ashman' Rowe
www.settlers.net

And no i cannot do it myself as i am incompetant Smile | :)

thanks

App trap a key, even if the App has no the focus

Braulio Dez25-Dec-01 23:46

Braulio Dez

25-Dec-01 23:46

Hi,

I´ve seen that some apps, like Babylon, can trap a key, or combination of events ( shift + right mouse), even if the application has not the focus.

How can be this thing done ?

Thanks, Bye !
Braulio

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