Please help!! Create a thread.. - C / C++ / MFC Discussion Boards

Joaquín M López Muñoz26-Mar-02 21:19

26-Mar-02 21:19

Try with srand(((unsigned)time(NULL))^GetCurrentThreadId()).

PS: I substituted ^ for |. XOR is better suited for this purpose.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Random!!!!! THANK YOU!!!

hkl26-Mar-02 21:40

hkl

26-Mar-02 21:40

FINALLY!!! I got stuck for so long!!

Socket Problem...

hkl26-Mar-02 19:14

hkl

26-Mar-02 19:14

Hi,

I use the following code:

if ( svrSocket.Accept(socket))
AfxMessageBox("Socket is created Succesfully");

flag = socket.Receive(buff,sizeof(buff));
....

Is it true that everytime "socket.Receive(..)" must wait until it actually receives something?? What if I want it to pause the receiving for a small period?? Because it would be simply dead if it never receive anything.

Can anyone please give me advance??

Thank you

Re: Socket Problem...

Joaquín M López Muñoz26-Mar-02 19:47

Joaquín M López Muñoz

26-Mar-02 19:47

Use asynchronous sockets (CAsyncSocket, if you're doing it the MFC way).

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Socket Problem...

hkl26-Mar-02 20:01

hkl

26-Mar-02 20:01

Thank you for your reply!! Smile | :)

Yes, I am doing the MFC way. But the socket cannot receive correctly if I use CAsyncSocket instead of CSocket.
Is there a problem of my program?? Or is there another way to do it??

Thanks!

Re: Socket Problem...

Joaquín M López Muñoz26-Mar-02 21:15

Joaquín M López Muñoz

26-Mar-02 21:15

The mode of use of CAsyncSocket is different than CSocket. Put briefly, with asynchronous sockets you've got to wait for the socket to tell you that reading/writing is permissible. Check the docs for this class.
So I'm afraid you'll have to rewrite portions of your code to change to asynchronous.
An alternative ad hoc solution I just ran into is using Tim Kosse's CSocket-Derived Class that Checks for Timeouts, which hopefully can be plugged into your program with minimum effort.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Socket Problem...

hkl26-Mar-02 21:19

hkl

26-Mar-02 21:19

Great! Thank you!! Let me try that!! Smile | :)

Please help!! Create a thread..

hkl26-Mar-02 18:13

hkl

26-Mar-02 18:13

Hi,

Can anyone tell me why I got the error?? And what I can do??

"error C2039: 'AfxBeginThread' : is not a member of 'CWinThread'"

CWinThread* pthread;
pthread = AfxBeginThread (Check, this);

UINT CMyClass::Check(LPVOID p)
{
CMyClass * me = (CMyClass *)p;
me->Check();
return 0;
}

void CMyClass::Check()
{...}

Please give advance!! Thank you!!!

Re: Please help!! Create a thread..

26-Mar-02 19:26

You may try to these:

define the Check() to static,not a member function.

Re: Please help!! Create a thread..

hkl26-Mar-02 19:33

hkl

26-Mar-02 19:33

Thanks!!!

But too bad, it doesn't work.

Re: Please help!! Create a thread..

Jon Hulatt26-Mar-02 22:26

Jon Hulatt

26-Mar-02 22:26

That compiler error will have displayed a line number. Post the code from that line so we can have a look.

Sorry to dissapoint you all with my lack of a witty or poignant signature.

MenuBar, how?

MaTrIX2k226-Mar-02 17:31

MaTrIX2k2

26-Mar-02 17:31

hi i've been looking for an example of a menu bar, but really it have a lot of controls, and i need to know what are the basic controls to make, this, what do i need to make a menubar derived from a toolbar?

Re: MenuBar, how?

Mazdak26-Mar-02 19:26

Mazdak

26-Mar-02 19:26

check menu control in CP.

http://www.codeproject.com/menu/

Mazy

"So,so you think you can tell,
Heaven from Hell,
Blue skies from pain,...
How I wish,how I wish you were here."
Wish You Were Here-Pink Floyd-1975

Reading/Writing LNK files

Lonnie26-Mar-02 16:50

Lonnie

26-Mar-02 16:50

Hello All,

I am trying to locate some VC++ 6.0 example that would show me how to read & write these shortcut LNK files.

In particular I am looking at how to read/write these application ICON files that can be seen on the Windows 95/98/2000 desktop and that are stored the users desktop directory.

These files, I think, are similar to the old PIF files but are now written in binary format and hold the particulars of an application or URL link.

Can anyone please assist?
Thanks,
Lonnie

--
Lonnie Cumberland
OutStep Technologies Incorporated
EMAIL: Lonnie@OutStep.com
: Lonnie_Cumberland@yahoo.com

The Basis Express Virtual Office
&
Data Backup and Recovery Services

URL: http://www.basis-express.com

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Re: Reading/Writing LNK files

alex.barylski26-Mar-02 16:59

alex.barylski

26-Mar-02 16:59

The explorer shell functions probably provide you with more than you could ask for. However i'm not 100% sure...Mike Dunn has some cool tut's on Shell extensions so maybe read up on them.

If you wanted to read and write them using CFile or something similar then you'll probably have pretty good luck locating the file structure Here

This is a list of just about every file structure known to man.

Cheers!

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Re: Reading/Writing LNK files

PJ Arends26-Mar-02 18:50

PJ Arends

26-Mar-02 18:50

Look up IShellLink interface in MSDN, also check out Mike Dunn's excellent article at http://www.codeproject.com/com/comintro.asp

---
CPUA 0x5041

Sonork 100.11743 Chicken Little

It may be that your sole purpose in life is simply to serve as a warning to others.

Custom toolbar's

alex.barylski26-Mar-02 16:43

alex.barylski

26-Mar-02 16:43

I have for the last 2-3 days tried to figure out the CControlBar in hopes of designing a custom toolbar, however I have decided time is running out and I must move on, but still refuse to use the standard MFC/common control toolbars.

I figure I will derive my class from CWnd instead of CCOntrolBar, docking isn't really required, I just thought it'd be neat. Smile | :)

If neat gives me heart aches, forget about it, i'll dumb it down a little.

For any controlbar it's absolutely essential that if it doesn't dock it alteast re-adjusts itself and the Frame windows client area IMO anyway. While exploring the CControlBar and MFC specific messages I ran across WM_SIZEPARENT which is sent by the parent(Frame) to all child windows within target ID range. Does this mean I could derive from Cwnd (Save myself some brain cells) and as long as my ID was withint range I can receive this message...?

I'm pretty sure this is how this works.

What I really wanna know is...When I have 2 or 3 other control bars (Status, Toolbar and custom dialogbar) when they are all positioned or docked they update the FrameWnd Client area (grow/shrink). It is this rect that is passed in as lParam in WM_SIZEPARENT...?

I tried this earlier and I kept getting the rect for the entire client area, so my custom bar would overlap the others...not a very desiarble effect. Does the frameWnd call RepositionBars each WM_SIZE it receives...? RecalcLayout adjusts the client area...?

Anybody have any ideas or suggestions...? Except Why don't I use CToolBarEx2 or something

Thanx in advance Smile | :)

Have a day!

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Re: Custom toolbar's

Shog⁹26-Mar-02 18:02

Shog⁹

26-Mar-02 18:02

What are your needs? If you just need a toolbar, perhaps w/ simple controls (entry fields/combo boxes), consider just building it from scratch w/ code:

Create CToolBar w/ appropriate styles
Create and populate image list(s) w/ neccessary icons
Build list of strings (if you want text for some/all buttons)
Build and populate array of TBBUTTON structures describing attributes of buttons and separators (separators also as placeholder for controls)
Add all these to the toolbar
Autosize the toolbar ctrl

This works nicely in almost all situations.

If you need something fancier, please attempt to use a library already written. There are some very nice (and free) ones out there. MFC's dockbar support is a horrible, crypic mess of undocumented spagetti code, hard-coded values, and ugly workarounds; it will permanantly scar your mind. I'd be willing to bet that someone unfamiliar with the code could more quickly implement the entire system from scratch than understand the existing one.

Ok, maybe i'm just dull, but in any case, life is too short, and MFC is dying. Don't make things any harder for yourself than necessary!
Smile | :)

_{And if words were wisdom, I'd be talking even more.}

The Offspring, I Choose

Debugging Recursive functions

John Cruz26-Mar-02 16:38

John Cruz

26-Mar-02 16:38

can anyone tell me how to debug and test recrusive functions??? i have trying putting trace statements and using the VC++ debugger but i always get lost on what i was doing. i trying looking at the call stacks but it is useless. Can anyone tell me what's the most efficient and the most easiest way to debug my recrusive function????

Thank you very much,
John Big Grin | :-D

Aloha from Hawaii Smile | :)

Re: Debugging Recursive functions

Paul M Watt26-Mar-02 16:44

Paul M Watt

26-Mar-02 16:44

I like to put a static nesting counter in temporarily to tell how many iterations deep I am. If a problem appears, I record how many levels deep I am, then it becomes easier to set breakpoints for the particular iteration.

Other than that I like to initialize the values in the function during runtime to test all of my exit cases.

Input from tablet

26-Mar-02 15:46

Hi,

I have a Genius NewSketch 1212 HR III V2 tablet connected to COM1. The driver for this tablet maps the 6000x6000 resolution to that of the screen 1024x768. Is there any way to read the full resolution of the tablet?

The tablet comes only with a user's manual, and there is no documentation for programmers on the web site.

An utility that comes with the tablet does read the 6000x6000 coordinates, though.

Cannot open ClassWizard???!!!!!!

ChiYung26-Mar-02 13:41

ChiYung

26-Mar-02 13:41

Hi, i have this error message when i try to open ClassWizard:

Parsing error: Expected end-of-line.
Input Line: "enum {IDD = IDD_MY454PROJECT_DIALOG};
ON_BN_CLICKED(IDC_BUTTON1, OnButton1)"

Here is my code in:

...Dlg.cpp
BEGIN_MESSAGE_MAP(CMy454ProjectDlg, CDialog)
//{{AFX_MSG_MAP(CMy454ProjectDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_START_BUTTON, OnStartButton)
ON_BN_CLICKED(IDC_STRICT_2PL_RADIO, OnStrict2plRadio)
ON_BN_CLICKED(IDC_2PL_RADIO, On2plRadio)
ON_BN_CLICKED(IDC_LOCK_X_RADIO, OnLockXRadio)
ON_BN_CLICKED(IDC_LOCK_S_X_RADIO, OnLockSXRadio)
ON_LBN_DBLCLK(IDC_WAITQUEUE, OnDblclkWaitqueue)
ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

And ....Dlg.h:
// Dialog Data
//{{AFX_DATA(CMy454ProjectDlg)
enum { IDD = IDD_MY454PROJECT_DIALOG };
CListBox m_WaitQueue;
CButton m_Strict2PL_RadioControl;
CButton m_LockSX_RadioControl;
CButton m_LockX_RadioControl;
CButton m_2PL_RadioControl;
int m_LengthOfSimulation;
int m_NumOfDBObject;
int m_NumOfUsers;
int m_NumOfOp_MAX;
int m_NumOfOp_MIN;
int m_WriteOpTime;
float m_PercentOfWrite_MAX;
float m_PercentOfWrite_MIN;
//}}AFX_DATA

// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CMy454ProjectDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
//}}AFX_VIRTUAL

Can you help me???

Re: Cannot open ClassWizard???!!!!!!

Chris Maunder26-Mar-02 17:33

Chris Maunder

26-Mar-02 17:33

Move the enum { IDD = IDD_MY454PROJECT_DIALOG }; outside the //{{AFX_DATA(CMy454ProjectDlg) section:

// Dialog Data

enum { IDD = IDD_MY454PROJECT_DIALOG };

//{{AFX_DATA(CMy454ProjectDlg)
CListBox m_WaitQueue;
CButton m_Strict2PL_RadioControl;
CButton m_LockSX_RadioControl;
CButton m_LockX_RadioControl;
CButton m_2PL_RadioControl;
int m_LengthOfSimulation;
int m_NumOfDBObject;
int m_NumOfUsers;
int m_NumOfOp_MAX;
int m_NumOfOp_MIN;
int m_WriteOpTime;
float m_PercentOfWrite_MAX;
float m_PercentOfWrite_MIN;
//}}AFX_DATA

cheers,
Chris Maunder

ToDo::AutoRun for starting a cd

antoine@orchus-tech26-Mar-02 13:16

antoine@orchus-tech

26-Mar-02 13:16

Hi all!

I have a cd.

On it is the introductory HTML pages for the software.

I need to make some kind of autorun that'll work for
Win95/98/millenium/2000/XP to start the main HTML page
when the user puts the cd into the computer.

Help is as always, greatly appreciated. Smile | :)

Thanks!

Antoine

Re: ToDo::AutoRun for starting a cd

Tomasz Sowinski26-Mar-02 13:20

Tomasz Sowinski

26-Mar-02 13:20

Use ShellExecute and pass the name of your .html file.

Tomasz Sowinski -- http://www.shooltz.com
** If you're going to rape, pillage and burn, be sure to do things in that order. **

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