Re: VS2010 Application Wizard - C / C++ / MFC Discussion Boards

VCSharp0071-Sep-10 21:09

1-Sep-10 21:09

Hi,
I am facing a problem related to window handle.
I have loaded two different OCXs in different instances of the same container application(OLE Server).
In OnCreate() method of second OCX control I am calling the AfxGetMainWnd()function.
It is called after calling the base class function of OnCreate() method.

Now trying to run both instances simultaneously.
The problem is sometimes AfxGetMainWnd()function returns the pointer to a window of first OCX control which is loaded in the first container instance just before. Why it happens?

Thankx in advance.

Regards,
SUnil

Fix for SQL Error 16943?

Sathish Guru1-Sep-10 19:15

Sathish Guru

1-Sep-10 19:15

One of my program in VC++ uses the MS SQL Server 2000 as the DB and the app was coded in VC++ 6.0. The DB part was governed by the MFCs CRecordset and so on. The data is populated through the sequence as follows

1.CRecordset::AddNew();

2.Fill all the columnar data of the record

3.CRecordset::Update()

The problem now surfaces is, when the app running if the Optimization Job is done then the 3rd step throws the following SQL Error(By SQL Profiler)

Msg 16943, Level 16, State 4 Could not complete cursor operation because the table schema changed after the cursor was declared.

Please help me out in fixing this. Thanks in advance. Smile | :)

combobox selection problem - stuck, wrong, etc.

permutations1-Sep-10 17:57

permutations

1-Sep-10 17:57

I really hope someone can offer some suggestions on this because I'm going bonkers here. I've spent days trying to hunt down this problem and I can't find it.

I have two combo boxes that are populated from atlas data. The first is a list of US states and countries. Once that selection is made, the second combo box is populated with a list of the cities in the selected state or country.

The code for the two is line-for-line identical - or as identical as it can be except for adding different strings. The combo box styles are identical, the event handling is identical. But one works (the state/country selection) and one has problems (the city selection).

In the state/country combo box, you can press the down arrow and move through the items. In the city combo box, the selection won't move with the arrow - or rather, it appears not to move. If you accept a selection and close the dialog, you find that the selection actually did change. You only can move one position with the arrow, and only the first time you try it. After that it appears stuck.

Also, when you make a selection with the mouse in the city combo box, you don't get what you select. You get a selection a few items off. The mouse selection works fine in the state/country combo box.

I have been over this code a million times and I can't see why one works and the other does not. Does anyone have any idea what the problem might be?

Thanks in advance.

Re: combobox selection problem - stuck, wrong, etc.

Peter_in_27801-Sep-10 19:30

Peter_in_2780

1-Sep-10 19:30

Just a thought. If you made the "line-by-line identical" bits by cut/paste/edit, maybe you missed one combobox reference in the edit part. Very easy to do and difficult to see[1], particularly if the names are similar (using something like ComboBox1 and ComboBox2 almost guarantees a problem).

[1] Difficult to see yourself that is, but often sticks out like dogs' ****s to someone else! Smile | :)

Software rusts. Simon Stephenson, ca 1994.

Re: combobox selection problem - stuck, wrong, etc.

permutations2-Sep-10 2:41

permutations

2-Sep-10 2:41

It's not practical to post the code. It's a long, complicated program. My next move will be to try to reproduce it in a test program. Maybe that will help.

I was hoping someone here would have an idea of what could even cause this kind of selection problem in a combo box. I have no idea.

Re: combobox selection problem - stuck, wrong, etc.

permutations2-Sep-10 5:18

permutations

2-Sep-10 5:18

I found the answer in an article on Newcomer's site:

http://www.flounder.com/updatedata.htm

I went through my program and commented out all instances of UpdateData(). Voila – problem gone. I may need to clean up a few problems using the control variables, but the problem that’s been driving me insane is solved. The cursor is unstuck.

VS2010 Application Wizard

Roger651-Sep-10 12:08

Roger65

1-Sep-10 12:08

In the application wizard, next to the last screen there is an option to have a Properties window added to your MFC Doc/View app. It is static, what does it take to make it functional?

Old dog learning new tricks!

Re: VS2010 Application Wizard

Niklas L2-Sep-10 12:00

Niklas L

2-Sep-10 12:00

Roger65 wrote:
what does it take to make it functional?

Ehum, some programming?

I recommend you implement some type of publish/subscribe pattern[^] where anyone who thinks he's got the focus, can publish a set of properties. The properties window will be a subscriber.

home

LNK 2001

T.RATHA KRISHNAN1-Sep-10 3:16

T.RATHA KRISHNAN

1-Sep-10 3:16

Hi!
I got the following linker error:

Error 1 error LNK2001: unresolved external symbol "public: void __thiscall player::writeNameOnTexture(void)" (?writeNameOnTexture@player@@QAEXXZ) battingTeam.obj

How do I resolve this error?

Re: LNK 2001

Cedric Moonen1-Sep-10 3:20

Cedric Moonen

1-Sep-10 3:20

It means the linker didn't find a body for the function. Did you forget to write the function body ?

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

Re: LNK 2001

Sauro Viti1-Sep-10 4:15

Sauro Viti

1-Sep-10 4:15

It means that the public method void writeNameOnTexture(void) of the class player could not been found. Probably you forgot to write down the body of it.

Re: LNK 2001

David Crow1-Sep-10 4:21

David Crow

1-Sep-10 4:21

T.RATHA KRISHNAN wrote:
How do I resolve this error?

Did you try here?

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creating sidebar like vista sidebar for XP

ganesh.dp1-Sep-10 2:45

ganesh.dp

1-Sep-10 2:45

I want to create a sidebar for windows xp using vc++. Sidebar is similar to vista sidebar.
I tried google to get idea, but everybody giving details about gadgets not side bar.

Anybody have any details about how to create a sidebar ?

Re: creating sidebar like vista sidebar for XP

Cool_Dev1-Sep-10 3:50

Cool_Dev

1-Sep-10 3:50

hope you looking for something like 'Analog Clock Control' CP article By michaelrawi

Re: creating sidebar like vista sidebar for XP

C^hris L^osinger1-Sep-10 4:28

C^hris L^osinger

1-Sep-10 4:28

why bother?[^]

image processing toolkits | batch image processing

Implementing timeout in downloading a webpage

learningvisualc1-Sep-10 2:40

learningvisualc

1-Sep-10 2:40

Hi all,

i have written a code to download a webpage using WinInet api's. My code is as follows

InternetCanonicalizeUrl(site,sCompareURL.GetBufferSetLength(MAX_BUFFER_SIZE),&dwLen,ICU_BROWSER_MODE);
HINTERNET Ihandle = InternetOpen("Internet Explorer6.0.2900.2180", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, NULL);
HINTERNET hFile = InternetOpenUrl(Ihandle,site,NULL,0,0,0);
BOOL bRet = InternetReadFile(hFile, szBuffer, MAX_BUFFER_SIZE, &nSize);
if(!bRet || nSize <= 0)
	break;
szBuffer[nSize] = '\0';
m_sHtml += szBuffer;

This code is working fine, but i want to implement time out in this, i.e i the specified page is not download in specified time then time out shold be displayed. How can i implement this?

Thanks in advance

Re: Implementing timeout in downloading a webpage

CPallini1-Sep-10 2:58

CPallini

1-Sep-10 2:58

You may try to set an option via InternetSetOption[^]
(the INTERNET_OPTION_RECEIVE_TIMEOUT flag looks promising, but I never made a test).
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
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This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
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[My articles]

If I want to achive the SMTP protocol, how can I do

yu-jian1-Sep-10 2:22

yu-jian

1-Sep-10 2:22

I know that if use the SMTP protocol, I should use the socket to create link with server.
And then
HELO SERVER
USER
PASS

but if I donot use the socket and I want to achieve the SMTP protocol , how should I do ?
Can someone give me suggestion?

Re: If I want to achive the SMTP protocol, how can I do

Emilio Garavaglia1-Sep-10 2:33

Emilio Garavaglia

1-Sep-10 2:33

Translate in to metaphor:
I know that to send a mail I have to plug to the network and then send it.
But if I don't use any network and I want to achieve the sending on the mail how should I do?

Frankly ... Or you use an SMTP service library (that use the socket internally, so it is not proper to say you're "not using socket") or ... try concentrate a lot, may be telepathy will work!

2 bugs found.
> recompile ...
65534 bugs found.
D'Oh! | :doh:

Re: If I want to achive the SMTP protocol, how can I do

CPallini1-Sep-10 2:42

CPallini

1-Sep-10 2:42

Pigeons are quite effective.
Smile | :)

Re: If I want to achive the SMTP protocol, how can I do

Moak1-Sep-10 5:24

Moak

1-Sep-10 5:24

I'll try an answer: Write a socket client that implements at least RFC 5321 and RFC 4954, both protocols are typically needed to be able to send emails.

Alternatively use a networking library that offers an SMTP client/example (e.g. libcurl, PichatCore, QT), the code to send an email could look like this:

CClientSmtp client; 
client.SetRequestServer("mail.example.com", 25, "example.com"); 
client.SetRequestEnvelope("sender@example.com", "receipient@example.com"); 
client.SetRequestData("Subject:Test email\n\nHi! I am hungry, please send some pizza."); 
client.Request(); //send request to server after email was put together

You need to decide if you want to implement everything yourself or take an existing C++ library. First will teach you a lot about networking protocols, later gives you the result right away. Hope this helps! Smile | :)

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Date

Bijo Pulikkottil1-Sep-10 2:19

Bijo Pulikkottil

1-Sep-10 2:19

Hi,

If I have today date. How can I get date before 7 or 10 days?

My means to say Using number of days, how to calculate preoius date from the current date?

Re: Date

Cedric Moonen1-Sep-10 2:38

Cedric Moonen

1-Sep-10 2:38

Take a look at the documentation of COleDateTime and COleDateTimeSpan.

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

Re: Date

Cool_Dev1-Sep-10 2:45

Cool_Dev

1-Sep-10 2:45

what is the format of time you are having? If in MFC its easy to use CTime and CTimeSpan classes.

psuedo code:

CTime curTime(...);
CTimeSpan span(7/*Days*/, 0,...);

Ctime newTime = curTime - span;

Re: Date

Bijo Pulikkottil1-Sep-10 3:20

Bijo Pulikkottil

1-Sep-10 3:20

Plz tell me how to do that?
If I want to get date before 7 days from current date?

How to do that?

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