Re: Sockets and Services - C / C++ / MFC Discussion Boards

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Re: [pure C] how to know if a FILE* is opened

Jon Sagara29-Nov-01 14:27

Jon Sagara

29-Nov-01 14:27

From MSDN entry on fopen():

... returns a pointer to the open file. A null pointer value indicates an error.

Jon Sagara

"Ninety percent of baseball is mental, the other half is physical." -- Yogi Bera

Re: [pure C] how to know if a FILE* is opened

Stephane Routelous29-Nov-01 14:44

Stephane Routelous

29-Nov-01 14:44

Thnaks, but it is not exacly what I want.

I assume that the FILE* is already opened, and I don't want to open it if it is already opened.
I've found :
http://www.tek-tips.com/gviewthread.cfm/lev2/4/lev3/32/pid/205/qid/94727

It seems that it is not possible.

Stephane

"It is ridiculous to claim that video games influence children.
For instance, if PacMan affected kids born in the eighties, we
should by now have a bunch of teenagers who run around in darkened
rooms eating pills while listening to monotonous electronic music."

Re: [pure C] how to know if a FILE* is opened

Nish Nishant29-Nov-01 16:15

Nish Nishant

29-Nov-01 16:15

Here is a round-about way to chk whether a FILE* is that of an open file

(1) use _fileno to get the file handle
(2) call _filelength passing this handle

if _filelength returns -1 file is not open else it is open

Nish

Sonork ID 100.9786 voidmain
www.busterboy.org
If you don't find me on CP, I'll be at Bob's HungOut

Building MFC Classes Software

Giancarlo Amati29-Nov-01 11:26

Giancarlo Amati

29-Nov-01 11:26

Hello Everybody,

I would ask u if anybody know some free visual tool do build MFC classes. I mean a software that help to build an MFC GUI without write an ex-novo source code.

Thank you.

Giancarlo

Have a good day

Re: Building MFC Classes Software

Nish Nishant29-Nov-01 16:18

Nish Nishant

29-Nov-01 16:18

There is a free edition of VC++ called VC++ learning edition.

I am not sure how you can get it, but I've seen it on CDs that come with several C++ programming books.

And you wont get the MSDN CDs either.

Nish

Sonork ID 100.9786 voidmain
www.busterboy.org
If you don't find me on CP, I'll be at Bob's HungOut

Re: Building MFC Classes Software

Michael P Butler29-Nov-01 22:45

Michael P Butler

29-Nov-01 22:45

Do you mean a RAD tool?

The only MFC one I know about is http://www.capitolsoft.com/Default.htm

It isn't free but you are unlikely to find anything of this nature that is.

Of course I still prefer to use the Visual Studio Dialog Editor and hand code the rest myself.

Michael Smile | :)

Sockets and Services

sassiecode29-Nov-01 11:24

sassiecode

29-Nov-01 11:24

I am using VC++ 6.0 with MFC. I have an app that needs to be a service that listens for messages from other pc's on the network. I have everything done, but I crash when I try to Call AFXSocketInit. If you know about services you really don't have a WinApp unless when you build the project you choose to use MFC as a dynamically shared dll. You have to set up the Service as a Console Win32 exe and then choose to use MFC. So the entry point is a "type" of main (_tmain). There for no OnInitialize for this project. No AfxSocketInit either. I believe when OnInitialize in the WinApp of a project gets executed there is a handle defined. I don't have that handle defined and I can't figure out why the AfxSocketInit doesn't work. If anyone has any suggestions I would appreciate all of them

Thanks

Carol

Re: Sockets and Services

Ravi Bhavnani29-Nov-01 12:14

Ravi Bhavnani

29-Nov-01 12:14

Perhaps its the SP3 bug that's biting you?
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q193101

/ravi

"There is always one more bug..."
ravib@ravib.com
http://www.ravib.com

Overriding the Save function

Chambers29-Nov-01 9:00

Chambers

29-Nov-01 9:00

Hi all, again, this is just a quick question. I have managed to create my own OnOpen and OnNew functions in my project in the CMainFrame class, however, I`ve tried doing it exactly the same for OnSave (not OnSaveAs - yet, cos I can`t get this going) but the function never gets executed - despite me clicking the menu button Save (I get the crappy dialog box coming up with Save As on it for some reason???). Just wondered if anyone had experienced similar problems, and what the solution was. I`ve tried overriding in both CMainFrame and CMDIFrame class but neither works,

Cheers guys,
Alan.

"When I left you I was but the learner, now I am the Master" - Darth Vader Mad | :mad:

Re: Overriding the Save function

Prem Kumar29-Nov-01 17:49

Prem Kumar

29-Nov-01 17:49

Hi U can override SaveModified which is the function which gets called when
the 'Save' or 'Save As' Happens, This is the function that prompts the Saving
and then calls DoFileSave-->DoSave.

So if u want to tailor to ur own needs i would recommend
that u copy the original code and modify to tailor ur needs,
U can find the source in 'doccore.cpp'(mfc src).

regards,
Prem

Printing Dialog Boxes

Gautam Deora29-Nov-01 8:40

Gautam Deora

29-Nov-01 8:40

Hello could anyone please tell me how I can print a complete dialog box. My dialog box contains bitmaps and some images.

I know how to print individual bitmaps, but I want to print the complete dialog box.

Thanks.

Gautam

Re: Printing Dialog Boxes

Prem Kumar29-Nov-01 18:10

Prem Kumar

29-Nov-01 18:10

Hi There is an exampe in the Platform SDK
known as 'Zoomin' which basically captures
the screen using Bit Blasting, u can use the
same and send ur dialogs image to the printer.

regards,
Prem

Opening Word

29-Nov-01 8:01

I'm creating a program in Visual C++ using the Microsoft Foundation Classes, and I'd like to open a Word Document when I click on a certain button in my program.

Does anyone know how I can do this or where I can find the code?

I noticed another question which is similar to this was recently posted, but I'm not sure how to actually Open Word at the minute.

Any help will be greatly appreciated.
Thanks

Re: Opening Word

Bill Wilson29-Nov-01 8:35

Bill Wilson

29-Nov-01 8:35

Look in MSDN at (Q238611) "Embed and Automate a Word Document with MFC"

HOpe this helps,
Bill

Re: Opening Word

Michael Dunn29-Nov-01 8:47

Michael Dunn

29-Nov-01 8:47

Call ShellExecute() and pass it the name of your .DOC file.

--Mike--
http://home.inreach.com/mdunn/
While I can't be correct on all matters, I can make the reassuring claim that where I am inaccurate, I am at least definitively inaccurate.
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ODBC and .txt files

Stanislav29-Nov-01 7:14

Stanislav

29-Nov-01 7:14

hi,
I have problems dealing with text files while
trying to open them through ODBC.
i'm with Win98 and in control panel (ODBC DATA SOURCES)
i assotiate an DNS to tab separated .txt,
when i open it in my program with
rs.Open()
the error is
Syntax error in FROM clause.
State:37000,Native:-3506,Origin:[Microsoft][ODBC Text Driver]

i'm in a hurry, that's why i ask so much, not reading Smile | :)

10x, Stanislav

Re: ODBC and .txt files

Nish Nishant29-Nov-01 16:27

Nish Nishant

29-Nov-01 16:27

There seems to be an error in your SQL.
Can you post the SQL here?

Nish

Sonork ID 100.9786 voidmain
www.busterboy.org
If you don't find me on CP, I'll be at Bob's HungOut

open a document

Monica29-Nov-01 7:04

Monica

29-Nov-01 7:04

hi!
i´m trying to open a word document, i can opent the word application, but i don´t know how to open the file inside.
Any ideas??

Thanks!!
Monica Confused | :confused:

Re: open a document

Bill Wilson29-Nov-01 7:32

Bill Wilson

29-Nov-01 7:32

Use the Open method of the Application.Documents collection.

You will undoubtably have more questions that can be answered by looking int the MS Word Help at the Microsft Word Visual Basic Referenc topic. Blush | :O

Hope this helps,
Bill

AfxResourceHandle is NULL

Bill Wilson29-Nov-01 6:49

Bill Wilson

29-Nov-01 6:49

I have a com server application (.EXE). It was created using ATL, with MFC support. Following instructions from MSDN (Q181505
PRB: ATL COM AppWizard Doesn't Offer MFC Support for .EXE )I added #include <afxdisp.h> to my stdafx.h and changed #include <winres.h> to #include <afxres.h> in the .rc file as recommended.

All is well except that AfxResourceHandle seems to be NULL. This manifests itself when CDatabase or CRecordset tries to throw CDBException. In building the exception it attempts a LoadString which gets an assertion due to AfxResourceHandle being null.

Can any help me out here? I'm pretty sure AfxResourceHandle never got assigned, probably because its an ATL project. Is there something else I need to do?

I've seen two differnt MSDN articles on the subject and they don't agree!) The other one is
Q173974 HOWTO: Add MFC Support to an ATL Project.

Thanks for the help,
Bill

Re: AfxResourceHandle is NULL

Michael Dunn29-Nov-01 7:00

Michael Dunn

29-Nov-01 7:00

Look up the AFX_MANAGE_STATE() macro in MSDN. You need to add this to the beginning of every COM method and exported function.

--Mike--
http://home.inreach.com/mdunn/
While I can't be correct on all matters, I can make the reassuring claim that where I am inaccurate, I am at least definitively inaccurate.
Heart | [heart]

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Re: AfxResourceHandle is NULL

Bill Wilson29-Nov-01 8:30

Bill Wilson

29-Nov-01 8:30

Thanks a bunch. That seems to fix it Big Grin | :-D

Thanks for the help,
Bill

Re: AfxResourceHandle is NULL OOPS not fixed after all

Bill Wilson29-Nov-01 10:11

Bill Wilson

29-Nov-01 10:11

OOPS, thought that fixed it, instead I also eliminated the error condition, causing it to not use the global. Now when I force a file error, I get the same condition. Here's the code I used:

STDMETHODIMP CFunction::Execute(BSTR bstrRequest, long lRowID, long *lRetVal)
{
	 ASSERT(afxCurrentResourceHandle != NULL);
	 AFX_MANAGE_STATE(AfxGetStaticModuleState( ));
	 ASSERT(afxCurrentResourceHandle != NULL);

Both asserts fire! I think there must something wrong with the initialization.

I also placed an assert in _twinmain before any of MY code is encountered (up 'til now its all wizardry!)

if (bRun)
 {
     ASSERT(afxCurrentResourceHandle != NULL);

This one fires also.

What is wrong? Every thing else is standard ATL .exe project.

Thanks for the help,
Bill

Numbering edit control

28-Nov-01 20:36

Hello I try find a solution Confused | :confused:

to show the linenumber in a edit control. But trying to get all the handles
- cursor movement
- scolling up/down
- moving the scoll-Slider ...
seems to be hard stuff Dead | X|

.
Looking at 4GLs I saw something like 'synchronize scrolling', so that I can place a widget close to the edit control, just showing linenumbers 1,2,3,.. . Scrolling in one widget will scroll the other.
Any idea to solve this problem Big Grin | :-D

?

Hansgeorg

Network problems in Win2000

v_krishnan28-Nov-01 20:06

v_krishnan

28-Nov-01 20:06

Hi,

I have installed Windows 2000 Professional on my machine and now I am facing a very strange problem. I am not able to run my applications that use windows sockets to connect/listen to connections from other machines. I am able to make atmost 2-3 connections only at a single time. I am also unable to browse the network from windows explorer when some connections are already made. The error that I receive is 'Insufficent quota of resources exist'. Can anyone tell me what the problem is and how to solve it?

Thanks,
Krishnan

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