C / C++ / MFC Discussion Boards

Michael P Butler24-Jun-03 3:50

24-Jun-03 3:50

It has been a while since I've done anything like this but,

I don't think you need your _kbhit loop. _getch() will wait for a character to be pressed before executing the next statement.

This is the MSDN example

// crt_getch.c
// compile with: /c
/* This program reads characters from
 * the keyboard until it receives a 'Y' or 'y'.
 */

   int ch;

   _cputs( "Type 'Y' when finished typing keys: " );
   do
   {
      ch = _getch();
      ch = toupper( ch );
   } while( ch != 'Y' );

   _putch( ch );
   _putch( '\r' );    /* Carriage return */
   _putch( '\n' );    /* Line feed       */
}

Michael

'War is at best barbarism...Its glory is all moonshine. It is only those who have neither fired a shot nor heard the shrieks and groans of the wounded who cry aloud for blood, more vengeance, more desolation. War is hell.' - General William Sherman, 1879

Re: Console app - how to "keep alive" ?

MrBean24-Jun-03 3:55

MrBean

24-Jun-03 3:55

Thanks... that seems to do the trick Smile | :)

However I need to do some processing in my _kbhit loop, but maybe I can find a workaround for this.

Re: Console app - how to "keep alive" ?

nfactorial24-Jun-03 5:36

nfactorial

24-Jun-03 5:36

If you need to do some processing inside the loop, call Sleep( 1 ) at the end of each loop. That should prevent starving windows of cpu time.

n!

Re: Console app - how to "keep alive" ?

MrBean24-Jun-03 22:56

MrBean

24-Jun-03 22:56

Thanks, the Sleep worked for me Smile | :)

Re: Console app - how to "keep alive" ?

David Crow24-Jun-03 3:58

David Crow

24-Jun-03 3:58

I think _getch() has a built-in wait so you might try removing the call to _kbhit().

Re: Console app - how to "keep alive" ?

MrBean24-Jun-03 22:57

MrBean

24-Jun-03 22:57

I needed some processing in the _kbhit loop but using Sleep in the loop solved the problem, thanks Smile | :)

Re: Console app - how to "keep alive" ?

peterchen24-Jun-03 9:35

peterchen

24-Jun-03 9:35

a) you can lower the thread priority while you wait for input
b) a Sleep(20) won't hurt

c) you can *try* if MsgWaitForMultipleObjects "wakes" your thread when you input a kjey (I doubt that, though)

"Der Geist des Kriegers ist erwacht / Ich hab die Macht" StS

sighist | Agile Programming | doxygen

Re: Console app - how to "keep alive" ?

MrBean24-Jun-03 22:56

MrBean

24-Jun-03 22:56

Thanks

I simply added a Sleep which did the trick Smile | :)

ISO-8601 Date Format and COleDateTime

Braulio Dez24-Jun-03 0:40

Braulio Dez

24-Jun-03 0:40

Hi,

Is there any method, function or way... to convert from ISO-8601 Date Format (yyyy-mm-ddThh:mm:ss), to COleDateTime ?

I'm tempted to make my own sh*tty function... but reinventing the wheel it's not a good idea... ( at least reinvent a bad wheel Smile | :)

).

Thanks in advance, Greetings
Braulio

Re: ISO-8601 Date Format and COleDateTime

Rage24-Jun-03 1:09

Rage

24-Jun-03 1:09

BOOL ParseDateTime( LPCTSTR lpszDate, DWORD dwFlags = 0, LCID lcid = LANG_USER_DEFAULT );
throw( CMemoryException );
throw( COleException );

should do the job (see MSDN for more). This parses your string and sets the COleDateTime.

~RaGE();

C# DLL and MFC app

vikramlinux24-Jun-03 0:30

vikramlinux

24-Jun-03 0:30

Dear all,
How to access a C# DLL function from a MFC app? Is it possible?

VikramS

Re: C# DLL and MFC app

Kannan Kalyanaraman24-Jun-03 1:13

Kannan Kalyanaraman

24-Jun-03 1:13

Yes it is possible.
You can do this in two ways.

1. By adding the /CLR compiler option and after that you can use the "#using" keyword to get your dll into MFC. for ex. #using <mycsharpassembly.dll>
You can instantiate the class or type inside your c# dll and call the methods.
Also note that with this your application now compiles to IL instead of x86 code,so unless you intend to compile the entire app to .net, this is not required.

2. Through COM Interop.
By decorating the c# class with COM attributes(mostly GUID) and then using the regasm tool to register the C# dll. Now you got a proper COM component in .net and you can use this MFC like how you access normal COM components.

Cheers,
Kannan

Re: C# DLL and MFC app

vikramlinux24-Jun-03 1:31

vikramlinux

24-Jun-03 1:31

Ya.. I got it..that is really nice soln. Now I want to pass a safearray of strings to that C# DLL. how to do this? Frown | :(

Re: C# DLL and MFC app

Kannan Kalyanaraman24-Jun-03 1:52

Kannan Kalyanaraman

24-Jun-03 1:52

I think you need to change your mail id for the ms programs to work Smile | :)

, okay just kidding.
I have never tried this, but start looking into
MarshalAsAttribute.SafeArraySubType or UnmanagedType.SafeArray
as function parameters in c#

Cheers,
Kannan

Re: C# DLL and MFC app

vikramlinux24-Jun-03 1:56

vikramlinux

24-Jun-03 1:56

Thank you..MarshalAsAttribute.SafeArraySubType works nicely.Anyway I love linux and windows both Smile | :)

Vikram

Re: C# DLL and MFC app

Kannan Kalyanaraman24-Jun-03 2:07

Kannan Kalyanaraman

24-Jun-03 2:07

vikrams wrote:
Anyway I love linux and windows both

Smile | :)

Cheers,
Kannan

Thread

BengCésar23-Jun-03 23:54

BengCésar

23-Jun-03 23:54

I use a thread like
http://www.codeproject.com/useritems/memberthread.asp?target=threadstruct
and I want it begins automatically after the display of the dialog Box

Where I have to place AfxBeginThread(...) ?

Excuse my poor english, I'm antartician

My uncle is a swindler and then?

Re: Thread

Rage24-Jun-03 1:06

Rage

24-Jun-03 1:06

Caïra wrote:
and I want it begins automatically after the display of the dialog Box

Where I have to place AfxBeginThread(...) ?

Right before the dialog box call (so before AfxMessageBox in this case).

~RaGE();

Re: Thread

Jonathan Craig24-Jun-03 5:15

Jonathan Craig

24-Jun-03 5:15

Set the dwCreateFlags parameter to CREATE_SUSPENDED.

CWinThread* pThread = AfxBeginThread(pfnThreadProc, pParam, THREAD_PRIORITY_NORMAL, 0, CREATE_SUSPENDED);

When you are ready for the thread to start execution call this:

pThread->ResumeThread();

Smile | :)

Jonathan Craig
www.mcw-tech.com

Serial Port Communication

DeepakSharma23-Jun-03 23:44

DeepakSharma

23-Jun-03 23:44

Hi friends,

i have an application which takes some inputs from a [B]SERIAL PORT RS232[/B] , so for using that application which is installed on some other system i need to desgin a mediator which will send command to that aaplication through my [B]SERAIL PORT[/B] so friend s please provide me some help how to start with such module which interacts with Serial port.

Also i have one query if i install both software my [B]HOST(WHICH PUSH COMMANDS TO CONTROL SYSTEM)[/B] AND [B]CONTROL SYSTEM(WHICH ACCEPTS COMMANDS AND SENDS BACK ACKNOWLEDGEMENT TO HOST)[/B] then will they be able to interact fine or i need to install them on diffrent machine and connect them through SERAIL CABLE.

waiting for a reply

deepak

Re: Serial Port Communication

Ted Ferenc24-Jun-03 4:57

Ted Ferenc

24-Jun-03 4:57

The simplest method is use

<code>hPort = CreateFile ("COM1",
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
0,
NULL);</code>

Look in the MSDN for "Programming Serial Connections", this should be OK unless you need something more advanced, but I don't think you do.

<HR SIZE=1 /HR>
<i>If I have seen further it is by standing on the shoulders of Giants.</i> - Isaac Newton 1676

Re: Serial Port Communication

DeepakSharma24-Jun-03 19:22

DeepakSharma

24-Jun-03 19:22

Thanks Ted,

I have written code, there is no problem in this.Now the problem is that i have my applictaion will talk to another application which is on another machine.Both machine are connected by NULL MODEM SERIAL RS232 cable.So i need to write and read from my COM port.So i have to desgin my program in such a way that whwenver any data comes from another machine to my port i raed it and similteanosly i can also write to it for the second application.

Hope u will help me

Deepak

https authentication

Tarundeep Singh Kalra23-Jun-03 23:43

Tarundeep Singh Kalra

23-Jun-03 23:43

hi all,
i want to do https authentication programatically , i mean without the use of browser.
is there any way to do.
any libraries.
TIA
regards
tarun

Re: https authentication

Ryan Binns24-Jun-03 1:09

Ryan Binns

24-Jun-03 1:09

Try the OpenSSL library (www.openssl.org[^]). It's complex, but so is SSL. It's probably the best SSL library around.

Ryan

Being little and getting pushed around by big guys all my life I guess I compensate by pushing electrons and holes around. What a bully I am, but I do enjoy making subatomic particles hop at my bidding - Roger Wright (2^nd April 2003, The Lounge)

Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late - John Nichol "Point Of Impact"

Re: https authentication

Tarundeep Singh Kalra24-Jun-03 3:03

Tarundeep Singh Kalra

24-Jun-03 3:03

thanks a lot for pointer
-regards
tarun

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