Re: Asynch Serial Comms - C / C++ / MFC Discussion Boards

Michael P Butler12-Jul-04 2:33

12-Jul-04 2:33

Well when I want an idea of something to develop, I hit sites like download.com and other shareware sites and that usual gives me some inspiration. Of course there are places like http://www.rentacoder.com[^] which have hundreds of project ideas.

Michael

CP Blog [^]

Re: New Project Ideas

Leyu12-Jul-04 5:12

Leyu

12-Jul-04 5:12

Thanks a lot

How to trap file reading and writing in Shared Folder over Network?

wangdave12-Jul-04 0:15

wangdave

12-Jul-04 0:15

Hi,
How to trap file reading and writing in Shared Folder over a Network for Workgroups in Windows? Further more, may I trap browsing event in Shared Folder?
Thanks. Laugh | :laugh:

Re: How to trap file reading and writing in Shared Folder over Network?

David Crow12-Jul-04 2:41

David Crow

12-Jul-04 2:41

Is this to run on a Windows For Workgroups machine? If so, you'll be needing a 16-bit solution. Dead | X|

Otherwise, if the machine is NT-based, check out ReadDirectoryChangesW() and FindFirstChangeNotification().

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

CoCreateInstanceEx Fails

Member 11790412-Jul-04 0:10

Member 117904

12-Jul-04 0:10

I have created a .net C# service and i am calling the service in COM.
Code below fails on CoCreateInstanceEx returns
hresult = 0x80040154,Class Not Registered.

CoInitialize(NULL);
CoInitializeSecurity(NULL, -1, NULL, NULL, RPC_C_AUTHN_LEVEL_NONE,
RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE, NULL);
COSERVERINFO serverInfo;
ZeroMemory(&serverInfo, sizeof(COSERVERINFO));

COAUTHINFO athn;
ZeroMemory(&athn, sizeof(COAUTHINFO));

// Set up the NULL security information
athn.dwAuthnLevel = RPC_C_AUTHN_LEVEL_NONE;
athn.dwAuthnSvc = RPC_C_AUTHN_WINNT;
athn.dwAuthzSvc = RPC_C_AUTHZ_NONE;
athn.dwCapabilities = EOAC_NONE;
athn.dwImpersonationLevel = RPC_C_IMP_LEVEL_IMPERSONATE;
athn.pAuthIdentityData = NULL;
athn.pwszServerPrincName = NULL;

char *HostName = GetHostName();
//char *IP = GetHostIP();
USES_CONVERSION;

serverInfo.pwszName = A2W(HostName);
//serverInfo.pwszName = A2W(IP);
serverInfo.pAuthInfo = &athn;
serverInfo.dwReserved1 = 0;
serverInfo.dwReserved2 = 0;

MULTI_QI qi = {&__uuidof(IMyInterface), NULL, S_OK};

IMyInterfacePtr* m_pIPtr;
try
{
m_pIPtr = new IAEMMainPtr;
}
catch(...)
{
::MessageBox(NULL,"Object Fails","MyClass",MB_OK);
return;
}

HRESULT hResult = CoCreateInstanceEx(__uuidof(_MyClass), NULL,
CLSCTX_LOCAL_SERVER | CLSCTX_REMOTE_SERVER, &serverInfo, 1, &qi);

if (FAILED(hResult))
{
delete m_pIPtr;
m_pIPtr = NULL;
::MessageBox(NULL,"CoCreateInstanceEx Fails","MyClass",MB_OK);
return;
}
m_pIPtr->Attach((IMyInterface*)qi.pItf);
(*m_pIPtr)->GetString(pRetVal);
CoUninitialize();

Sathish

Asynch Serial Comms

louis11-Jul-04 23:59

louis

11-Jul-04 23:59

Hi there,
Is there any other way of implementing asynchronous serial communication in Visual C++ than the MFC way. The MFC way is too time consuming.
I so far have seen that _inp and _outp are only for WIN95 platform.

Any suggestions will help.

Thanks.

Re: Asynch Serial Comms

palbano12-Jul-04 5:00

palbano

12-Jul-04 5:00

You can use CreateFile and the Win32 Communications API which contains functions like BuildCommDCB(...) etc.

Re: Asynch Serial Comms

louis12-Jul-04 21:42

louis

12-Jul-04 21:42

Thanks for the reply.

Yes, you're right CreateFile() and the WIN32 Comms API can be used.
My problem is that I receive data that is between 40 and 45 bytes in length far too late. The instrument on the other side sends the data at 9600 baud every 100ms. My program must receive it by 65ms.
At the moment the data is received it at approximately 80ms, which is way too late. I have used the CreateFile() and ReadFile() with the necessary time-out, threads and event operations to read the data.
I also wrote a utility in Delphi which seem to work fine (54ms). Unfortunately the code must be in C++ as it fits into a bigger Visual C++ program.

Any ideas.

Thank again.

File delete dialog

Anonymous11-Jul-04 23:25

Anonymous

11-Jul-04 23:25

My application have to offer a dialog to select a file to be deleted.

I've tought to CFileDialog but it is useful only to open or to save a file.
Is there a way to have a dialog to browse files in order to select a file to be deleted ?

Thank you very much !

Re: File delete dialog

Anonymous11-Jul-04 23:33

Anonymous

11-Jul-04 23:33

You can just use CFileDialog to select the file, by just display the "Open" dialog and with the filter flags OFN_HIDEREADONLY | OFN_FILEMUSTEXIST and just change the title of the dialog (I think there is a member function to do that) or that a look at m_ofn member data.

Re: File delete dialog

Mike Dimmick11-Jul-04 23:44

Mike Dimmick

11-Jul-04 23:44

You can still use a File Open dialog to ask for a file name to be deleted; you'll need to change the title and the caption on the action button to Delete.

To change the title, set the m_ofn.lpstrTitle member. Changing the action button's caption is harder: I think you'll have to create a hook procedure which handles WM_INITDIALOG; in the handler, call SetWindowText for the button with the IDOK control ID (which you can get with GetDlgItem).

Stability. What an interesting concept. -- Chris Maunder

Re: File delete dialog

V.11-Jul-04 23:52

11-Jul-04 23:52

I would use CFileDialog to select the file, show the path in an editbox and let the user press delete.
This way the user can rethink his/her decision.

so my advice would be:browse button to select (show path in editbox)
delete button for the obvious action of deleting the selected file;)
MessageBox to confirm.

hope it helps.

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix

Re: File delete dialog

ThatsAlok12-Jul-04 0:28

ThatsAlok

12-Jul-04 0:28

here your solution->

Use this little Piece of code

 CFileDialog a(TRUE);//open file dialog<br />
 a.DoModol();<br />
///get the name of file to be deleted<br />
CString sr=a.GetPathName();<br />
//delete the file<br />
::Unlink(sr);

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

PropertySheet dissappearing

emmatty11-Jul-04 22:45

emmatty

11-Jul-04 22:45

I created a MFC dll in which I created a dialog and i placed a OCX over it.But when i domodal that dialog from a exe the dialog is not displaying but when i remove the ocx control the dialog is displaying properly.what will be the problem?

thanks,
john

Re: PropertySheet dissappearing

David Crow12-Jul-04 2:46

David Crow

12-Jul-04 2:46

Sounds like AfxEnableControlContainer() has not been called?

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

include any animated images(.gif) into richedit box....

mvnevis11-Jul-04 22:44

mvnevis

11-Jul-04 22:44

hi,

i want to include any animated images(.gif) into richedit box. Is it possible or not.if, tell me how it can be done.

thank you.

wt DLL are Required

Zeeshan Bilal11-Jul-04 21:16

Zeeshan Bilal

11-Jul-04 21:16

I m building my own installer,
and want to install my application at client machine . where VC++ is not installed .. wt dll's r required or files required to sent with my EXE ... ,, that build was using static Link library n Release mode configuration. r they ( files/dll)differ with operating system version Win 98 / XP /2000

or any other way

thanx

Re: wt DLL are Required

Antony M Kancidrowski11-Jul-04 22:42

Antony M Kancidrowski

11-Jul-04 22:42

The easiest way to find which DLLs are required by your program is to use the application Depends.exe

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)

How to change the font size and background of static text?

Rajesh_K_Sharma11-Jul-04 20:25

Rajesh_K_Sharma

11-Jul-04 20:25

Hi I have created three property-page(Page1,Page2 and page3)on a property sheet.Now I want to set the font to the arial 24 of static text on page1 and I want to change the background colour of static text box on page 1.
How do I write code on page1 to have arial 24 font?

rajesh

Re: How to change the font size and background of static text?

P-Rex11-Jul-04 20:46

P-Rex

11-Jul-04 20:46

Look at:
CFontStatic[^]

Which function will add outside External Hardware to our Computer

zahoor ahmed11-Jul-04 20:02

zahoor ahmed

11-Jul-04 20:02

Hi,
I want to do one project based on interface between external hardware and system. for that i need one API ( system function) which will connect to the port. Through that requesting to the hardware and getting respond from it.

Re: Which function will add outside External Hardware to our Computer

Antti Keskinen11-Jul-04 20:59

Antti Keskinen

11-Jul-04 20:59

The key question is WHAT is the interface you plan to use ? COM port ? Printer port ? USB port ? PCI bus ? IrDA port ?

APIs and system functions are not the same thing. Win32 API (application programming interface) offers access to a limited set of Win32 platform functions (functions that can command the operating system).

Be more specific on the project if you want us to help. We can't help you unless we know what you wish to do Smile | :)

-Antti Keskinen

----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.

Sysutil from Alok killed my computer dead

quzi11-Jul-04 19:35

quzi

11-Jul-04 19:35

Hi,

I isn't know what it done, but I runned sysutil from Alok and is desktop now blank, and things not work. Was this program a trojan? What is done? I way to fix what broke?

Re: Sysutil from Alok killed my computer dead

Antti Keskinen11-Jul-04 21:08

Antti Keskinen

11-Jul-04 21:08

Based solely on the context and professionality of the article in question, I decided not to even download/run this application on my computer. Basically, it seems you have locked yourself out from your own computer by using a software incorrectly. I believe, however that it is not a virus. It's just a software that locks/disables features from your computer and you've used it incorrectly.

For an attempt to fix it, run your computer in Safe Mode, then run the Sysutil again. This time, enable ALL options, and allow access to ALL hard drives. Then reboot. If this fixes the problem, then DELETE the Sysutil program, run a virus scanner on your machine, and NEVER install or run a software that you don't know, or can't find a proper manual/details to.

All in all, all you can blame now is yourself. 99% of viruses loose out there spread because of actions taken by the users. If every people suddendly knew how to use a computer properly and what files/file extensions/web sites should be avoided, then the virus writers would have a much harder time indeed...

-Antti Keskinen

----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.

Re: Sysutil from Alok killed my computer dead

quzi11-Jul-04 21:39

quzi

11-Jul-04 21:39

Thanks for your advises on what is need to do.

Antti Keskinen wrote:
All in all, all you can blame now is yourself.

I know. But is meaning that should never be run any programs from CodeProject? When is OK to try, and when is not OK?

I wanted to seeing how is works this program, and I realized too later that is not seeming to be OK. Now, I is afraid to be trying programs.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.