C / C++ / MFC

Re: Weird ODBC bug

David Crow5-Jan-04 11:05

David Crow

5-Jan-04 11:05

In the constructor of your CRecordset-derived class, you need to initialize the CTime member variables. Something like:

CMeetSet::CMeetSet(CDatabase* pdb) : CRecordset(pdb)
{
    //{{AFX_FIELD_INIT(CMeetSet)
    m_strName = _T("");
    m_nFields = 2;
    //}}AFX_FIELD_INIT
    m_dtDate = CTime(NULL); // needed this to keep Update() from crashing
    m_nDefaultType = snapshot;
}

A rich person is not the one who has the most, but the one that needs the least.

Re: Weird ODBC bug

Salvador Dali5-Jan-04 14:54

Salvador Dali

5-Jan-04 14:54

Thanks David, it seems to work.
I assumed that classwizard handles all the variable initialization needed at class creation.

Have no fear of perfection - You will never reach it

Re: Weird ODBC bug

David Crow6-Jan-04 2:30

David Crow

6-Jan-04 2:30

Salvador Dali wrote:
I assumed that classwizard handles all the variable initialization needed at class creation.

Normally it does, but there is a known issue with time-related variables.

A rich person is not the one who has the most, but the one that needs the least.

Baloon Tip for Tray Icon

---Ranger---5-Jan-04 0:34

---Ranger---

5-Jan-04 0:34

Do anybody this under vc++ 6 ?

Thanks

---Ranger---

Change title bar color

no_life4-Jan-04 23:13

no_life

4-Jan-04 23:13

Hi,

I am currently struggling getting the title bar color changed. I want to change it to something that matches the dialog colors/bitmaps. Ive read a few articles but i just cant comprehend them.

Any comments or advise is welcome, thanks

Can anybody help me. I am facing display problem in MSFlexGrid activex Control in VC++

Member 7383644-Jan-04 23:04

Member 738364

4-Jan-04 23:04

The problem is displaying the text in FlexGrid cell. when number of characters in the cell exceeds 682 characters the text is getting overlapped. I have tried to solve this problem using WordWrap API and SetColWidth API. But I didn't get the solution. If anybody knows the solution, please post the solution.

Ramanan

Scrolling CHtmlView

Moilanen4-Jan-04 21:36

Moilanen

4-Jan-04 21:36

I have CHtmlView -based MFC application, and a problem like this: if I open a PDF -document, the application opens Adobe Acrobat reader and shows the document okay, but when I try to scroll it by the code (for example with ScrollToPosition() -method), nothing happens. Is there a way to scroll the picture? Thank you for answers.

Control the Recording volume control through code

elza4-Jan-04 20:30

elza

4-Jan-04 20:30

I am able to adjust the Playback volume control through VC++ code. But how can I access the Recording volume control. Any idea??

Re: Control the Recording volume control through code

Anonymous4-Jan-04 23:38

Anonymous

4-Jan-04 23:38

yes!it's so easy.first,you check in your debug.adjust,the playback volume control.if,cannot adjust through debug u your adjust through mother f***er....ha..ha..include<iostream..h>

Diff. b/w Single Threaded and Multi Threaded

Shenthil4-Jan-04 20:26

Shenthil

4-Jan-04 20:26

What is the Difference Between Single Threaded Apartment model and Multi Threaded Apartment Model?

Why CoInitialize specifies the concurrency model as single-thread apartment?

Where can I find more Information about this.

Shenthil

Re: Diff. b/w Single Threaded and Multi Threaded

valikac5-Jan-04 4:51

valikac

5-Jan-04 4:51

Essentially, an STA coclass is designed for single-thread. COM protects the COM object via limiting access using a queue.

Under MTA coclass model, the developer is responsible for thread synchronization.

Kuphryn

heap question

abc8764-Jan-04 20:21

abc876

4-Jan-04 20:21

if we dynamically allocate memory, it is allocated on heap...
is it just reference of that memory which is in stored in heap or the memory itself??

Muhammad Shoaib Khan
http://geocities.com/lansolution

Re: heap question

Prakash Nadar4-Jan-04 22:17

Prakash Nadar

4-Jan-04 22:17

Ofcource in the memory itself.

Programming is an art not a skill, every one can be a skilled programmer but not an artist.

Re: heap question

Mike Beckerleg6-Jan-04 2:39

Mike Beckerleg

6-Jan-04 2:39

The memory itself is stored in the heap. The function used to allocate the memory (new, malloc, etc) returns a pointer to the location in the heap.

Mike

Controlling the recording control microphone

Anonymous4-Jan-04 20:06

Anonymous

4-Jan-04 20:06

How can i increase or decrease the Recording control microhpne volume??

EXE on DOS and win32

pranavamhari4-Jan-04 19:54

pranavamhari

4-Jan-04 19:54

hi,

can one write an exe that will run on DOS and windows ? I mean in windows it should be able to show message box, dialogs etc.

I am asking this because one program I downloaded from net seems to do this.

regards
hari

Hari Krishnan

Re: EXE on DOS and win32

abc8764-Jan-04 20:06

abc876

4-Jan-04 20:06

you can display Message Box and call MFC in Win32 Console Applicationscreated in VC++

Muhammad Shoaib Khan
http://geocities.com/lansolution

Re: EXE on DOS and win32

Rickard Andersson²⁰5-Jan-04 2:55

Rickard Andersson²⁰

5-Jan-04 2:55

That is a Win32 Console Application which you can do GUI in. With DOS applications you can't deal with GUI.

Rickard Andersson
Here is my card, contact me later!
UIN: 50302279
Sonork: 37318

gethostbyname failed in Window XP

lauch24-Jan-04 19:34

lauch2

4-Jan-04 19:34

I found that gethostbyname() would be failed if I disconnected the cable from the LAN adapter. However, if I re-connected the cable to the LAN adapter, it worked fine.

More info is:
If the cable is disconnected from the LAN adapter, ipconfig command will return the following:

Ethernet adapter Local Area Connection:
Media State . . . . . . . . . . . : Media disconnected

Any idea? Eek! | :eek:

Thanks in advance,
lauch.

Re: gethostbyname failed in Window XP

Roger Wright4-Jan-04 20:42

Roger Wright

4-Jan-04 20:42

getHostByName() retrieves information from the DNS or WINS server. If you unplug the cable it has nowhere to look for the information.

"Another day done - All targets met; all systems fully operational; all customers satisfied; all staff keen and well motivated; all pigs fed and ready to fly" - Jennie A.

Re: gethostbyname failed in Window XP

lauch24-Jan-04 21:31

lauch2

4-Jan-04 21:31

Thanks, Roger Wright.
Then, if I unplug the cable, how can I retrieve the IP address of the local machine?
I have used the following ways, but all they are failed:
1. Use API getaddrinfo()
2. Use API GetAdaptersAddresses()
3. Use INTRFC.exe sample, which in turn use the API WSAIoctl(s,
SIO_GET_INTERFACE_LIST, NULL, 0, &localAddr, sizeof(localAddr),
&bytesReturned, NULL, NULL);

In addition, I know the IP addresses are stored in the regitry. However, I want to use other ways to IP addresses if the cable is unpluged.

thx,
lauch.

CPropertySheet failing to create

Kibble4-Jan-04 18:41

Kibble

4-Jan-04 18:41

I am having trouble getting a CPropertySheet to not fail create. I've set it up like this example:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_mfc_cpropertysheet.3a3a.create.asp

The differences are its not in a CView derived class. Does that really cause the Create to fail? It will be a huge pita to derive the outer class from CView.

I'm getting Assertion failed in dlgprop.cpp line 201, no other information.

Re: CPropertySheet failing to create

valikac5-Jan-04 4:53

valikac

5-Jan-04 4:53

The type of the parent view does not affect a property sheet.

Kuphryn

i learn c++

than naing nge4-Jan-04 18:35

than naing nge

4-Jan-04 18:35

help me
i learn c++(programming language).you help me anyway.
(eg. books or website)
you new friend
than naing nge
Myanmar(burma)

Re: i learn c++

Selvam R4-Jan-04 18:47

Selvam R

4-Jan-04 18:47

Hello,

http://www.research.att.com/~bs/C++.html
http://www.cplusplus.com/
http://www.msdn.microsoft.com/visualc/
http://www.codeproject.com;P
http://www.codeguru.com

With Regards,
R.Selvam

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