psyclope17-Feb-04 14:52

17-Feb-04 14:52

How do I delete a file in VC++. Let's say that I have a file in this path - C:\Windows\MyFile.jpg. How do I delete this file.

Re: Delete File

Jeremy Falcon17-Feb-04 14:55

Jeremy Falcon

17-Feb-04 14:55

MFC...
::DeleteFile("C:\\Windows\\MyFile.jpg");

Non MFC...
DeleteFile("C:\\Windows\\MyFile.jpg");

Jeremy Falcon

Re: Delete File

bryce17-Feb-04 16:55

bryce

17-Feb-04 16:55

CFile::Remove("C:\\Windows\\MyFile.jpg");

dont forget to catch any cfile exceptions
Bryce

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Unable to excute the service application on WIndowsXP basically built on Windows2000

Anonymous17-Feb-04 14:30

Anonymous

17-Feb-04 14:30

hi,
My prblem is like.......
I have created a Service which uses one custom-built library file in Windows200, the service is running successfully in WIndows2000 environment.
I have used library file by specifying in Project->Settings->Link.

But, when i m trying to run the same service on WindowsXP it gives me an error. By debugging the application, i find out that the cause of error is the custom-built library file.

I have tried to copy the LIB file to the folder where EXE lies, and then to system32 folder...then also the service is giving an Error.

The Error is like "The service did not respond to start or control request in timely fashion"

If anyone knows the answer pls reply me asap.

Re: Unable to excute the service application on WIndowsXP basically built on Windows2000

Mike Dimmick18-Feb-04 1:51

Mike Dimmick

18-Feb-04 1:51

It's possible that Windows XP has a lower tolerance for services that are slow to start. You should call RegisterServiceCtrlHandler as soon as possible in your ServiceMain, and give an accurate idea of how long it's going to take to start up using SetServiceStatus, in the dwWaitHint parameter. If this time is about to expire and you've not finished starting up yet, increment dwCheckPoint and call SetServiceStatus again. Be sure to call SetServiceStatus with dwCurrentState set to SERVICE_RUNNING once you're actually started.

The LIB file is a red herring. If it's a static library, all referenced code and data contained within it has been included in your executable. If it's an import library, you need to ensure that the DLL containing the imported functions can be found. It's preferable to place it in the same folder as the executable.

Use depends.exe from the Platform SDK to discover which DLLs an executable uses.

ARRRRRRUUUGGHHH date parsing is driving me crazy....

(Steven Hicks)ⁿ⁺¹17-Feb-04 13:57

(Steven Hicks)ⁿ⁺¹

17-Feb-04 13:57

Ugh Why does this return a CTime of December 31, 1969 when I pass a CString of "Tue, 17 Feb 2004 20:21:51 GMT"
?

It works fine with dates such as Feburary 17, 2004, how can I get it to work with that CString?

CString ConvertDateToCString(CTime m_ctDate)
{
//Variables
//Date: 2 16 04
CString m_strResult="";
CTime ctResult=CTime::GetCurrentTime();

//

//Display yesterday if m_ctDate matches up with yesterday
//Date: 2 16 04
ctResult-=CTimeSpan(1,0,0,0);
if (m_ctDate==ctResult) m_strResult="Yesterday";
//

//Display today if m_ctDate matches with the current day
//Date: 2 16 04
ctResult-=CTimeSpan(1,0,0,0);
if (m_ctDate.GetDay()==CTime::GetCurrentTime().GetDay()) m_strResult="Today";
//

//Otherwise return the date
//Date: 2 16 04
if (m_strResult=="")
m_strResult=m_ctDate.Format("%b-%d");
//

return m_strResult;
}

-Steven Hicks

CPA

CodeProjectAddict

Actual Linux Penguins were harmed in the creation of this message.

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Re: ARRRRRRUUUGGHHH date parsing is driving me crazy....

Robert A. T. Káldy18-Feb-04 0:21

Robert A. T. Káldy

18-Feb-04 0:21

How you initialize the m_ctDate? I think that there is any signed/unsigned long mismatch, because 17.2.2004 the time_t value (number of seconds since 1.1.1970) exceeded 0x8000000.
Another small brother of Y2K problem Laugh | :laugh:

Robert-Antonio

"Love without sex is like a fish without antlers"

Re: ARRRRRRUUUGGHHH date parsing is driving me crazy....

Robert A. T. Káldy18-Feb-04 1:06

Robert A. T. Káldy

18-Feb-04 1:06

Eeeeehhhh...0x40000000, not 0x8000000!!

Re: ARRRRRRUUUGGHHH date parsing is driving me crazy....

(Steven Hicks)ⁿ⁺¹18-Feb-04 3:22

(Steven Hicks)ⁿ⁺¹

18-Feb-04 3:22

Its CTime m_ctDate.

-Steven Hicks

CPA

CodeProjectAddict

Actual Linux Penguins were harmed in the creation of this message.

More tutorials: Ltpb.8m.com: Tutorials |404Browser.com (Download Link)

Multiple Radio Button

merlin37117-Feb-04 13:00

merlin371

17-Feb-04 13:00

Hi, I'm Trying to make a small program dialog based, I have a good few options to set and I have to put in 3 different Radio buttons group the problem is when I click on one radio button the other one goes, how can I get the radio button to work between groups?

thanks

Re: Multiple Radio Button

Jeremy Falcon17-Feb-04 14:48

Jeremy Falcon

17-Feb-04 14:48

On the Radio Button Properties window click the "Group" checkbox for the first (and only the first) radio button in group.

Jeremy Falcon

Re: Multiple Radio Button

merlin37117-Feb-04 23:53

merlin371

17-Feb-04 23:53

Thanks very much it worked

Re: Multiple Radio Button

Jeremy Falcon18-Feb-04 3:23

Jeremy Falcon

18-Feb-04 3:23

No problem. Smile | :)

Jeremy Falcon

Movable button

junkan123417-Feb-04 11:48

junkan1234

17-Feb-04 11:48

Need help dudes:
I needed a class for a moveable button. So I derived a class from CButton and added the funcions OnRButtonDown, OnRButtonUp and OnMouseMove.
In OnRButtonDown I set a bool var (m_bIsDragging) to true, and in OnRButtonUp back to false;
In OnMouseMove, if m_bIsDragging==true, I check for cursor position with GetCursorPos() and set the new position for the button accordingly. It seems to work quite fine but...
PROBLEM:
while dragging, if I move the mouse too fast, the cursor exits the button client area (i.e. the button position doesnt change fast enough to keep pace) causing of course the funcion (which is a member of the button object) to stop working, and the button to stop moving.
Is it there a simple way to:
1) have the button really stick to the cursor so that it doesn't slip out of its client area;
2) have the member funcion OnMouseMove continue to get message input even if the cursor gets outside the button's client area?

Thanks in advance for any help...
Ciao from Italy!!!!
Junkan.

Junkan

Re: Movable button

Robert A. T. Káldy18-Feb-04 0:26

Robert A. T. Káldy

18-Feb-04 0:26

Call SetCapture() in OnRButtonDown handler and ReleaseCapture() in OnRButtonUp.

ActiveX control

Anonymous17-Feb-04 11:10

Anonymous

17-Feb-04 11:10

Hi all

My MFC application is using an ActiveX control in one of its windows.
Is there any way to use this control out of my process? I meen to run it (or to host it) in another process wich will be executed from my app, but still be able to see it on my app's window, like now.
What is the best way to this?

Thanks.

Basic Serial I/O in VC++

JoeMass17-Feb-04 11:03

JoeMass

17-Feb-04 11:03

I have limited VC++ experience. I have used C and other languages a lot. I need to communicate with a serial device from a VC++ Dialog application, which I am developing.

How do I do this?

Thank you,
Joe Massarelli

Re: Basic Serial I/O in VC++

Anonymous17-Feb-04 13:34

Anonymous

17-Feb-04 13:34

I posted this reply (incorrectly - the guy was asking about a parrallel port...) this morning.

Mostly like reading and writing a file: (EXAMPLE - your mileage may vary...)

void CSerialPort::initPort(int comNumber, int baudRate)
{
closePort();

m_ComNumber = comNumber;
m_BaudRate = baudRate;

CString comStr;
comStr.Format(_T("%s%d"), _T("COM"), comNumber);
m_ComHandle = CreateFile(comStr,
GENERIC_READ | GENERIC_WRITE,
0, 0,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
0);

DCB dcb;
GetCommState(m_ComHandle, &dcb);
dcb.BaudRate = m_BaudRate;
dcb.ByteSize = 8;
dcb.Parity = NOPARITY;
dcb.StopBits = ONESTOPBIT;
SetCommState(m_ComHandle, &dcb);

COMMTIMEOUTS timeouts;
timeouts.ReadIntervalTimeout = MAXDWORD;
timeouts.ReadTotalTimeoutMultiplier = 0;
timeouts.ReadTotalTimeoutConstant = 0;
timeouts.WriteTotalTimeoutMultiplier = 0;
timeouts.WriteTotalTimeoutConstant = 0;
SetCommTimeouts(m_ComHandle, &timeouts);

EscapeCommFunction(m_ComHandle, SETRTS);
EscapeCommFunction(m_ComHandle, SETDTR);
}

bool CSerialPort::readByteFromChannel(char* inByte)
{
DWORD numRead;
BOOL ret = true;

ret = ReadFile(m_ComHandle, inByte, 1, &numRead, 0);
return ( (ret) && (numRead == 1) );
}

void CSerialPort::sendPacket(char* pktBuffer, int len)
{
DWORD numWritten;
WriteFile(m_ComHandle, pktBuffer, len, &numWritten, 0);
if (numWritten != (DWORD)len)
// do comm error handling here

}

Re: Basic Serial I/O in VC++

r i s h a b h s17-Feb-04 22:19

r i s h a b h s

17-Feb-04 22:19

and how 'bout usb port?

rIsHaBh

Re: Basic Serial I/O in VC++

jhorstkamp18-Feb-04 3:12

jhorstkamp

18-Feb-04 3:12

Don't know - haven't had to do them yet but I think they are treated the same as basic serial ports.

Re: Defining functions in other files

satcat17-Feb-04 10:22

satcat

17-Feb-04 10:22

I've created the .H files and I've put the include. Now my problem is with keeping the linker from complaining about multiply-defined symbols... I'm getting some linker errors and I've read in the page that you told me but I'm lost. I don't know which symbols should I define so I don't get this linker errors.
I'm getting this errors:

<br />
imevo.obj : error LNK2001: unresolved external symbol _IID_ITTSBufNotifySink<br />
imevo.obj : error LNK2001: unresolved external symbol _CLSID_TTSEnumerator<br />
imevo.obj : error LNK2001: unresolved external symbol _IID_ITTSFindA<br />
imevo.obj : error LNK2001: unresolved external symbol _CLSID_MMAudioDest<br />
imevo.obj : error LNK2001: unresolved external symbol _IID_IAudioMultiMediaDevice<br />

In imevo.cpp these symbols are used in some functions like these:

hRes = CoCreateInstance(CLSID_MMAudioDest,NULL,CLSCTX_ALL,IID_IAudioMultiMediaDevice,
			(void**)&pIAMM);

hRes=CoCreateInstance(CLSID_TTSEnumerator,NULL,CLSCTX_ALL,IID_ITTSFind,(void**)&pITTSFind);

hRes=pITTSFind->Select(TTSModeInfo.gModeID, &pITTSCentral, (LPUNKNOWN) pIAMM);

hRes=pITTSCentral->TextData(CHARSET_TEXT,0,datos,NULL,IID_ITTSBufNotifySinkW);

I think I've defined all variables that I should (in imevo.cpp)

<br />
ITTSCentral *pITTSCentral;<br />
IAudioMultiMediaDevice *pIAMM;<br />
PITTSFIND pITTSFind;<br />

But I get these errors. Any idea? How should I use yor advice (I don't know if I need it or not)

<br />
#if !defined(some_unique_symbol_here)<br />
#define some_unique_symbol_here<br />
#pragma once<br />

?

Thank you very much Smile | :)

Re: Defining functions in other files

Michael Gunlock17-Feb-04 19:16

Michael Gunlock

17-Feb-04 19:16

The following may help.

Create a separate .cpp file, change it to not using precompiled headers, and add the following.

#include <objbase.h><br />
#include <initguid.h><br />
#include <speech.h>    // or <spchwrap.h>

Also make sure the paths are set correctly to the SAPI .dll and .lib files in your VS settings.

Record count on a CRecordSet

Ger Hayden17-Feb-04 10:11

Ger Hayden

17-Feb-04 10:11

I want to supply "Select count (*) from Employee" as the sql to a CRecordSet call, but CRecordSet dosent support Count(*) and advices m_ptr->MoveNext() all the way to the end where GetRecordCount will have the answer!

Any tips on implementing an equivalent of Count(*)??

Ger

Re: Record count on a CRecordSet

David Crow17-Feb-04 10:52

David Crow

17-Feb-04 10:52

Put "SELECT COUNT(*) FROM Employee" in the CRecordset::GetDefaultSQL() method. The record set will need one member variable to hold the returned value. m_nFields should be set to 1 in the constructor. You'll need an entry in the DoDataExchange() method.

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

Re: Record count on a CRecordSet

basementman17-Feb-04 11:17

basementman

17-Feb-04 11:17

David,

I think you have too much time on your hands.... you've answered every message and left no scraps for the rest of us...;P

onwards and upwards...

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

C / C++ / MFC

CPA

CPA