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I've been playing with ADO and it's pretty easy to read them out using ADO and access the records. It would be trivial to then write them to disk.
There are some ADO classes on this site ( not that I used them, but they should explain it better than I can )
Christian
Secrets of a happy marriage #27:
Never go to bed if you are mad at each other. It's more fun to stay up and fight.
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Thanks for the response. Iwould appreciate any help with the code. I am able to add and delete records using DAO and I need a comma delimited text file to use with another program upon exporting.
thanks
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someone can help me to implement a function that allows users to select a region of the screen with mouse ?
Thank
Leo.
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Hi,
I've got a Dr Watson eachtime I want to print with a program generated on a Win200 machine.
(The programm is created with Windows Installer 1.1)
It use a CPrintDialog.
In the Dr Watson file, there is a Kernel32!RaiseException with a return code = c06D007e
Can someone help me ???
Guitch
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You, or someone else, create a program with Windows Installer that has printing capabilities. I must have missed that day of the class.  I think you mean that you are using a program installed via a Windows Installer package. Do other programs have similar errors? Do you have the code for this program?
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Hi,
I'm trying to implement a drag drop within my MFC, MDI based app.
I have a CTreeView derived view, and I've implemented drag drop with it. I want the user to be able to drag treeview items and drop them on another window in my application.
I haven't implemented everything yet, but I'm taking it step by step. Here's what I've done
1. Handled the TreeView notification TVN_BEGINDRAG. Used the TreeCtrl to create a drag image list, done a BeginDrag and a DragEnter, set a member pointer to this window (m_p_wndDragSrc) in my main frame, and then SetCapture() in the main frame, my CMDIFrame derived window...
2. The CMDIFrame window handles WM_MOUSEMOVE to update the imagelist/pointer location.
That much all works fine.
What I want to happen is that when a drag starts, if the cursor is moved over a different child window in the main frame, that window should be brought to the front.
I've tryed code like this in the CMainFrame::OnMouseMove function:
CWnd *p_wndUnderPoint=ChildWindowFromPoint(point);
if (p_wndUnderPoint && (p_wndUnderPoint != this))
p_wndUnderPoint->SetFocus();
Unfortunately, this doesn't do anything. I've tryed all sorts of possible CWnd:: functions, like SetFOcus, BringWindowToTop and so on. But none of them have the desired effect.
Can anyone give me some pointers? (pun. bad one. sorry)
Thanks in advance for your help
Jon
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If you get any answer,Please E-mail to me.
datablader@263.net
Thank you!
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In my formview I've placed a flexgrid. I've also rezised it to fit the window by using WM_SIZE. Because the flex grid is placed on a formview you can see a small border around the flex grid when you run the application. I don't want to see this border. Can anyone please give me an example in how I remove it. I've read that WM_NCPAINT maybe can be useful but I don't know how to use it.
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Hi,
I'm trying to put large text files in rich edit controls but a rich edit only accepts 4K standard.
Somebody able to help me?
Thanks.
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I am modifying a project that uses Shell_NotifyIcon to add an application to the system tray. What I want is to prevent the same application running more than once. The project is not using MFC and I would prefer to keep it that way. Is there any way to detect the applications running in the System Tray using the API?
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You could use the ::FindWindow(..)
hope that helps
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You can enumerate the processes on the system, but this works differently for Win 9x and NT systems.
I can dig out some sample code if you need it, as I've used it to detect if a program was running, and if so to wait for it to finish.
Giles
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I to all.
I've a little problem on trying to intercept the WM_QUIT message on an MFC based application.
I want to display a message on user which allow select to exit application or not.
I'm not using Document/View architecture so I don't need to mark any document to dirty.
Thanks to anyone.
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Try to put this code in OnAppExit of your CMainFrame class
if (AfxMessageBox("Do you really want to exit?",MB_YESNO) == IDYES)
{
CMainFrame::OnClose();
}
Lio.
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Thank you for this code Lio, now another question: and if I have a CListCtrl Document?
Thanks a lot.
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I created a dll (Win32- Dynamic Link Library)
and I'm having a trouble loading that DLL ( using 'LoadLibrary' / 'GetModuleHandle')
*** I keep getting a NULL or the handle is invalid. (GetLastError() returns 6 or 126) ***
PLEASE, I've been on then about 6 hours straight.
Is there anything I'm missing ????
NOTES:
1: Could it be that functions can not be importable?
2: Could it be that the released .dll file is damaged?
please H E L P ! ! !
Name: STR
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Hi,
The GetLastError() function of yr's says "Handle invalid"(6) and "Module can't be found"(126).So, I hope problem with the Dll path u have given.First find out in which path yr Dll is present and give that path in the LoadLibrary()/GetModuleHandle() function.Then check for the handle.This could be the only problem I hope.Let me know if it works.
Regards,
yamini.
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Thanks for your quick answer
But...
That is not the problem.
I could this function like this:
1: 'LoadLibrary("c:\\MyDLL2.DLL")'
or
2: 'LoadLibrary(_T("c:\\MyDLL2.DLL"))'
or
3: 'LoadLibrary((LPCTSTR)"c:\\MyDLL2.DLL")'
*) I added 'C:\MyDLL2.lib' in Project->Settings...
*) I added 'C:\' to the system path
*) I added 'C:\' to the project path (in Project->Settings)
 I don't know what to do
Name: STR
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Launch depends.exe - Dependency Walker which is a part of MsVisual C++. Drag and drop this Your dll onto depends.exe window. See what it will say.
Probably some dll which is required by Your dll cannot be found. For example the dll You are loading needs msvcrt.dll(insert any), which is not on the path.
Hope, this helps
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Hi,
I use CreateFile, ReadFile, WriteFile, COMMSTAT, CLEARCOMMERROR for using the SerialPort in RS422.
I would like some help for settings the DCB.
I use my little program for communicate with a device.
In my settings , I would like :
- 38400 Bauds,
- 8 Bits,
- 1 Stop Bit,
- EVEN Parity,
- Binary Mode,
- Set RTS and DTR Enable,
- HandShaking comRTS.
If anyone can check my code for correct it because it doesn't working with my interface in RS422. But if I use this with hyperterminal in RS232 NullModem cable all are ok.
Best regards
// Open SerialPort (nComport = the port number )
//----------------------------------------------
//
// HANDLE hPort;
DWORD dwError; // dwThreadID;
DCB PortDCB;
COMMTIMEOUTS CommTimeouts;
CString strComPort;
strComPort.Format("COM%d", nComport);
// Open the serial port.
BETACART_hPort = CreateFile (strComPort, // Pointer to the name of the port
GENERIC_READ | GENERIC_WRITE,
// Access (read/write) mode
0, // Share mode
NULL, // Pointer to the security attribute
OPEN_EXISTING, // How to open the serial port
0, // Port attributes
NULL); // Handle to port with attribute
// to copy
// If it fails to open the port, return FALSE.
if ( BETACART_hPort == INVALID_HANDLE_VALUE )
{
// Could not open the port.
MessageBox (TEXT("Le Port RS sélectionné n'existe pas"),
TEXT("Error"), MB_OK);
dwError = GetLastError ();
}
PortDCB.DCBlength = sizeof (DCB);
// Get the default port setting information.
GetCommState (BETACART_hPort, &PortDCB);
// Change the DCB structure settings.
PortDCB.BaudRate = 38400; // Current baud
PortDCB.fBinary = TRUE; // Binary mode; no EOF check
PortDCB.fParity = TRUE; // Enable parity checking.
PortDCB.fOutxCtsFlow = FALSE; // No CTS output flow control
PortDCB.fOutxDsrFlow = FALSE; // No DSR output flow control
PortDCB.fDtrControl = DTR_CONTROL_DISABLE; //DTR_CONTROL_HANDSHAKE; //DTR_CONTROL_ENABLE;
// DTR flow control type
PortDCB.fDsrSensitivity = FALSE; // DSR sensitivity
PortDCB.fTXContinueOnXoff = TRUE; // XOFF continues Tx
PortDCB.fOutX = FALSE; // No XON/XOFF out flow control
PortDCB.fInX = FALSE; // No XON/XOFF in flow control
PortDCB.fErrorChar = FALSE; // Disable error replacement.
PortDCB.fNull = FALSE; // Disable null stripping.
PortDCB.fRtsControl = RTS_CONTROL_HANDSHAKE; //RTS_CONTROL_ENABLE;
// RTS flow control
PortDCB.fAbortOnError = FALSE; // Do not abort reads/writes on
// error.
PortDCB.ByteSize = 8; // Number of bits/bytes, 4-8
PortDCB.Parity = EVENPARITY; //ODDPARITY; // 0-4=no,odd,even,mark,space
PortDCB.StopBits = ONESTOPBIT; // 0,1,2 = 1, 1.5, 2
// Configure the port according to the specifications of the DCB
// structure.
if (!SetCommState (BETACART_hPort, &PortDCB))
{
// Could not configure the serial port.
MessageBox (TEXT("Unable to configure the serial port"),
TEXT("Error"), MB_OK);
//dwError = GetLastError ();
}
// Direct the port to perform extended functions SETDTR and SETRTS.
// SETDTR: Sends the DTR (data-terminal-ready) signal.
// SETRTS: Sends the RTS (request-to-send) signal.
EscapeCommFunction (BETACART_hPort, SETDTR);
EscapeCommFunction (BETACART_hPort, SETRTS);
youssef
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Hi Youssef
I'm not a guru here, but after a quick look at the specs I'd say that RS422 and RS232 are almost but not quite compatible. RS232 uses a 3 wire interface, while RS422 uses a 4 wire connection, refered to as 'balanced' - I think you will not be able to go directly from your PC to the RS422 device.
But, there are converters available to go between RS232 and RS422 devices - probably available for something like 50USD. Search for RS422 on Google, you'll find a bunch!
HTH
T
later...
Of course, if you already have one of these converters, then I'm being presumptious, and will shut up and go away...
BTW what kind of device is it?
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hi,
in the Internet Options' connection tab, there is
a group of radio buttons with following value:
1) never dial a connection
2) dial whenever a connection is not present
3) always dial my default connection.
where the value is stored? and can we set this in the code?
thanks.
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Hi
I have some question about DAO :
1 - When I use MFC wizard there is three choice
(Snapshot , Dynaset , Table),so what difference ...
2 - If my access file has two tables I have two problems :
A- How I can determine which table I want to add record ...
B- When I use code like this
m_pSet->AddNew();
m_pSet->m_id=1; //table 1
m_pSet->m_name="Ahmad"; //table 1
m_pSet->m_id2=1; //table 2
m_pSet->m_phone=21598356; //table 2
m_pSet->Update();
a meesage box appeare and tell me that :
Can't update. Database or object is read only
3- How I can use SQL statements with VC++ 6 ...
Thank you
AHMAD ALWASHALI
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Here's some short replies. I really recommend that you read some books on the subject, as it is a huge one. "Microsoft Jet Database Engine Programmers Guide" used to be online on MSDN, but I can't find it there anymore. It's a bit outdated anyway, but gives you a good grip on DAO (although it's written for VB!!!). If you have some MSDN Library CD's from last year I guess it will be there.
The answers:
1: snapshot: the resultset is a snapshot of the data in the database. Changes to the data in the db after the snapshot is opened is not reflected in the snapshot. The snapshot is read-only (and I vaguely remember something about it being forward-only also).
Dynaset: the resultset represents the actual data in the database at the time you fetch (i.e. read) the data. Updateable.
Snapshots and Dynasets are the result of a query, i.e. an SQL statement.
Table: as Dynaset, but gives you all the fields of one particular table. Among other things very useful if you want to browse the table, or as a basis for a data-entry form in your program.
2: You probably asked for a snapshot - they're read-only.
3: Use a QueryDef object. Here you can set the SQL text.
good luck
Steen
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