C / C++ / MFC Discussion Boards

jmkhael7-Jun-04 4:50

7-Jun-04 4:50

Create your fonts on the Heap (using new)
Dont forget to delete (push in a list or something)

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Navigating through CForimView controls

dart136-Jun-04 23:59

dart13

6-Jun-04 23:59

How to implement movement between button controls placed on a CFormView with arrow keys? Buttons are positioned like chessboard squares - so when the arrow key for left is pressed the focus should move to the button placed left and so on.
Should SetFocus() be overriden?

Re: Navigating through CForimView controls

Johan Rosengren7-Jun-04 6:10

Johan Rosengren

7-Jun-04 6:10

I have difficulties seeing what SetFocus should accomplish Smile | :)

You can, for example, add the arrow keys as accelerators in the accelerator table and map them to functions in your view.

Re: Navigating through CForimView controls

dart138-Jun-04 1:07

dart13

8-Jun-04 1:07

I just want to move focus from one button to another, so the desired button can be activated by pressing ENTER.
It is possible to move focus with TAB key as well as with arrow keys, but focus goes from one button to the other as it was set in Layout -> Tab Order.
What I want to accomplish is to move focus in one of four directions using arrow keys, but I am not sure what's the best way to implement this behaviour.

Re: Navigating through CForimView controls

Johan Rosengren8-Jun-04 1:24

Johan Rosengren

8-Jun-04 1:24

dart13 wrote:
What I want to accomplish is to move focus in one of four directions using arrow keys

I understood that much, and I really think that you should try with accelerators. In the view - where you handle the message - you might want to check what control currently has the focus, and change it according to the pattern you want.

It is a button having the focus when the key is pressed, and therefore the keypress will be sent to the button (actually, the key up message will be sent... to the button the focus was moved to!). Therefore, the most basic place to handle this would be in a CButton-derived class.

But it is not a good way to solve the problem!

If you try handling the focus setting itself, you'll get into all sorts of grief, as changing the focus in a focus-handler (that is, a handler to WM_SETFOCUS) will most probably get you in trouble.

Furthermore, if you handle this from the buttons themselves, you'll have to post messages to the owner anyway, as an individual button will have no knowledge of the other buttons on the view.

So, accelerators!

Prblm in video capturing

Zeeshan Bilal6-Jun-04 23:32

Zeeshan Bilal

6-Jun-04 23:32

HI,

MY application (build with DirectShow and VC++) working fine to capture video

but a problm is I m using TV CARD + camera to capture video........

When my Computer Restarts or Reboots or i restart it after Shutting down

i need to run first Software of TV CARD ( ITS murcery Tv CArd)

then after closing it (TV card software)

I run my application ,,,, it works fine. and till again shutdown of Computer it works fine

IF i not run TV CARD software ,, My application not capture the video ..

I want to remove the dependency on TV CARD SOFTWARE..Y my application need to run it first ...

WT is the problm ,, is the TV cARD software DLLs load problm...

PLZ help me or any sampl code zahid_ash@hotmail.com

thanx ..

Retrieving control's original class by its ID?

Daredevil6-Jun-04 23:13

Daredevil

6-Jun-04 23:13

Hello,
In my program I dynamically create controls according to data read from a database. The control can be either CEdit or CComboBox. I also assign a unique control ID to each of the created controls (I know the ids).

Once controls created when a button pressed it's supposed to save controls values in the database.

Getting the text from the CEdit control isn't a problem as I just do GetDlgItemText(...). However, in case of the CComboBox I need to retrieve the ItemData using GetItemData. This is where I'm unsure of what to do.
I don't save anywhere if control with specific ID is a CComboBox or CEdit. Is is possible to know only by ID what kind of a control it is and to retrieve its original class?.

I was thinking just to make a struct:
struct {
CEdit *edit=NULL;
CComboBox *combo=NULL;
} myDynControls;

and then make an array of this struct. Each coresponding to an ID. I won't have more than 10 controls at a time.

What do you think? Is it a good idea? (i will delete everything after done working with ofcourse Smile | :)

)

Re: Retrieving control's original class by its ID?

Andrew Quinn AUS6-Jun-04 23:33

Andrew Quinn AUS

6-Jun-04 23:33

Hi Daredevil,

All MFC classes that derive from CObject (of which CWnd does) have a CRuntimeClass object associated with it.
So to see if your object is a CEdit control:

CWnd* pWndControl = m_arrMyControls[i]; // or however you've implemented the collection of controls
if (pWndControl && pWnd->GetSafeHwnd())
{
 CRuntimeClass* pClass = pWnd->GetRuntimeClass();
     // MSDN says that pClass will never be NULL, but we should always check pointers before use
     if (pClass)
     {
     CString strName = pClass->m_lpszClassName;
         // Now you can do whatever you need to do based on what the runtime class is
         // ...
         // ...
         // ...
     }
}

Hope this helps,
Andy

Re: Retrieving control's original class by its ID?

David Crow7-Jun-04 2:10

David Crow

7-Jun-04 2:10

How about using IsKindOf()?

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

CIndexes help required..

Chris Ulliott6-Jun-04 23:12

Chris Ulliott

6-Jun-04 23:12

Hi All,

Although the primary keys are working fine I am having terrible trouble getting the Index information.

Any ideas what I am doing wrong? Here is some code:

CIndexes rsIndex;
hResult = rsIndex.Open(m_session, NULL, NULL, NULL, tableData->sSchema, tableData->sName);

if(hResult == S_OK)
{
hResult = rsIndex.MoveNext();
while (hResult == S_OK) {
CString indexColumnName =
rsIndex.m_szColumnName;
indexes.Add(indexColumnName);
hResult = rsIndex.MoveNext();
}
}

I have tried it with 4 NULL's and not passing the schema name but it still gives me a zero record count.

Any ideas would be appreciated!
Thanks,
Chris

communication on serial port com

jetournier6-Jun-04 21:57

jetournier

6-Jun-04 21:57

I developped a program to communicate on serial port com. It works fine on xp/W2000.
Then I wanted to include this into a bigger project, so I decided to change it into a dll. It works fine on W2000, but the same application using the same dll NEVER works on WXP. Does anybody have an idea about what could happen?

When I say it never works I mean that the thing that reiceives the data transferred on the serial link (I see the data transferred via a spy on the link) does'nt act as it really reiceived everything OK. I mean all the data are transferred, but it acts as if the flow was interrupted sometimes.

THANKS for your help!!!!

Create menu !!! Icon

Qdlaty6-Jun-04 21:48

Qdlaty

6-Jun-04 21:48

How can I add icon to main menu. (not use MFC).???
I have 2 files. First zasoby2.rc :
/////////////////////////////////////////////////////////////////////////////
//
// Menu
//

MOJEMENU MENU DISCARDABLE
BEGIN
POPUP "&Program"
BEGIN
MENUITEM "&Wyj?cie", IDM_WYJSCIE
END
POPUP "&Model"
BEGIN
MENUITEM "&Liniowy", IDM_LINIOWY
MENUITEM "&Nieliniowy", IDM_NIELINIOWY
MENUITEM "&Zerwanie", IDM_ZERWANIE
END
POPUP "&Pomoc"
BEGIN
MENUITEM "&O programie...", IDM_O_PROGRAMIE
END
END

Second menu1.h :
//zdefiniowane operacje menu
//#define IDM_NOWA 100
#define IDM_WYJSCIE 101
#define IDM_O_PROGRAMIE 102
#define IDM_LINIOWY 103
#define IDM_NIELINIOWY 104
#define IDM_ZERWANIE 105
//#define IDM_BLOKADA 106

#define IDI_IKONA1 210
#define IDI_IKONA2 220
#define IDI_IKONA3 230
#define IDI_IKONA4 240

//
#define IDC_MAIN_EDIT 111
#define IDC_MAIN_TOOL 112

What can I do ??
Please help!! Qdlaty

Change Header & Footer when use CHtmlView

MachineMHK6-Jun-04 21:36

MachineMHK

6-Jun-04 21:36

Hi,

I made a web browser using CHtmlView. it works perfactly. When i want to print a webpage it print with its own header & footer. I want to change these Header and Footer as i like.

If i get some help on this matter, it will relief a great pain.

Thanking you.

[Shumon]

A simple way to encrypt/decrypt a CString?

anderslundsgard6-Jun-04 21:25

anderslundsgard

6-Jun-04 21:25

I’m going to Serialize a class with CString and int-members to a file and then transfer it over the network. One of the members is a password-like one and I would like it to be encrypted before the serialization.

Any tip fore easy implementation.

...and justice for all

APe

Re: A simple way to encrypt/decrypt a CString?

Brian Delahunty6-Jun-04 21:39

Brian Delahunty

6-Jun-04 21:39

Have a look at the C++ Cryptography[^] section of CP. Plenty of examples and implementations there.

Regards,
Brian Dela Smile | :)

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How to Close the instance by if i have its HANDLE

Zeeshan Bilal6-Jun-04 20:58

Zeeshan Bilal

6-Jun-04 20:58

HOW to Close the instance of application run by my COde..
if i have its HANDLE

????
thanx

Re: How to Close the instance by if i have its HANDLE

Diddy7-Jun-04 0:46

Diddy

7-Jun-04 0:46

That wont close anything.

I think he is saying how to kill an application started by his application when he has it's handle.

CloseHandle will close the Kernel handle - when the handles refrence count drops to 0, but wont actually close the spawnded process.

TerminateProcess() will very nastly kill a process given its handle.

Re: How to Close the instance by if i have its HANDLE

Anthony_Yio7-Jun-04 1:37

Anthony_Yio

7-Jun-04 1:37

Yes, you are right.

Guess I am being spontaneous. Blush | :O

Sonork 100.41263:Anthony_Yio

Accessing folders of remote system

aparajita6-Jun-04 20:58

aparajita

6-Jun-04 20:58

,
How to get the contents of a folder from remote system in VC++ ?
The contents retrieved from the folder of remote system should be added to the listbox of our application.
Can anyone help me pls........ Hmmm | :|

Raji

Re: Accessing folders of remote system

Brian Delahunty6-Jun-04 21:47

Brian Delahunty

6-Jun-04 21:47

What exactly do you want to do??? Is it to get the contents of a shared folder on a remote computer or the contents of a folder on a remote computer without any shared folders?

Regards,
Brian Dela Smile | :)

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Re: Accessing folders of remote system

aparajita13-Jun-04 21:34

aparajita

13-Jun-04 21:34

i want to get the contents of a shared folder of a remote system

Raji

Re: Accessing folders of remote system

David Crow7-Jun-04 2:19

David Crow

7-Jun-04 2:19

The CFileFind class supports UNC so it can iterate remote folders as well as local folders. Something like:

CFileFind ff;
BOOL bFound = ff.FindFile("\\\\server\\share\\users\\davidc\\*.*");
do
{
    bFound = ff.FindNextFile();
    TRACE("%s\n", ff.GetFilePath());
} while (bFound != FALSE);

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

Creating movable bar

aparajita6-Jun-04 20:47

aparajita

6-Jun-04 20:47

,
How to create a movable bar/line on a picture box using VC++?

Aparna

Re: Creating movable bar

Anthony_Yio6-Jun-04 20:48

Anthony_Yio

6-Jun-04 20:48

Look for MFC CRectTracker.

Sonork 100.41263:Anthony_Yio

Problem with header file -MAC Address

6-Jun-04 20:25

Hi,
I included this file in my source code and depsite this it throws error.
I am ruunng on Windows 2000 PROFESSIONAL.
Looks strange.
Psl helpme out.This is the source code available from MSDN.

//#include "windows.h" header file"
#include <windows.h>
//#include "stdio.h" header file
#include <stdio.h>
//#include "tchar.h" header file
#include <tchar.h>
//#include "iphlpapi.h" header file
#include <iphlpapi.h>

int main()
{
HRESULT hr;
IPAddr ipAddr;
ULONG pulMac[2];
ULONG ulLen;

ipAddr = inet_addr ("192.168.25.31");
memset (pulMac, 0xff, sizeof (pulMac));
ulLen = 6;

hr = SendARP (ipAddr, 0, pulMac, &ulLen);
printf ("Return %08x, length %8d\n", hr, ulLen);

size_t i, j;
char * szMac = new char[ulLen*3];
PBYTE pbHexMac = (PBYTE) pulMac;

//
// Convert the binary MAC address into human-readable
//
for (i = 0, j = 0; i < ulLen - 1; ++i) {
j += sprintf (szMac + j, "%02X:", pbHexMac[i]);
}

sprintf (szMac + j, "%02X", pbHexMac[i]);
printf ("MAC address %s\n", szMac);

delete [] szMac;

return 0;
}

after compiling:

Error Big Grin | :-D

:\kuttanur\macaddress\mac.cpp(5) : fatal error C1083: Cannot open include file: 'iphlpapi.h': No such file or directory

Regards

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