C / C++ / MFC Discussion Boards

Alvaro Mendez15-Jan-03 5:19

15-Jan-03 5:19

It would help if we knew what this DTE object is. More importantly, search for the type-library. Once you find it, you can use the Class Wizard/Automation tab to add a wrapper class for it which you can then use in your code.

Regards,
Alvaro

All you need in this life is ignorance and confidence, and then success is sure. -- Mark Twain

DDX and DDV with variables gives a parsing error...

Joan M14-Jan-03 23:54

Joan M

14-Jan-03 23:54

Hello,

1. I need to monitor that the user has entered values that are in range.
2. There is only one editControl that is used in order to enter values for 4 different things.
3. The DDV that I've placed is equal thatn the normal one but I've changed the maximinum allowed value to a variable in order to make it more flexible and capable to adapt to each maximum value.

This is what I've done:

DDX_Text(pDX, IDC_ED_POSICIO_DESTI, m_veddPosicioDesti);
DDV_MinMaxDouble(pDX, m_veddPosicioDesti, 0., this->m_EixSeleccionat.m_MovimentEixDirecte.m_dPosicioMaximaPermesa);

but the problem is that when I enter the Class wizard (Ctrl+W) I receive this message:

Parsing error: Expected ")".<br />
Input Line: "DDV_MinMaxDouble(pDX, m_veddPosicioDesti, 0., this->m_EixSeleccionat.m_MovimentEixDirecte.m_dPosicioMaximaPermesa);"

What can I do in order to avoid that message?

Thank you in advance.

Re: DDX and DDV with variables gives a parsing error...

Roger Allen on a course15-Jan-03 2:35

Roger Allen on a course

15-Jan-03 2:35

your getting theproblem because you place the DDX_... command within the //AFX_DATA comment blocks. These are the lines that class-wizard will parse during the load phase. If you move the line outside of the comment block, then class-wizard will be happy.

Re: DDX and DDV with variables gives a parsing error...

Joan M15-Jan-03 19:40

Joan M

15-Jan-03 19:40

Thank you!

monitoring file system

ValentinR14-Jan-03 23:22

ValentinR

14-Jan-03 23:22

hi there
does anyone know how can i log the activity of the file system?
i need to know when a file opens and store the name in a database
thank in advance for your help

Re: monitoring file system

xxhimanshu14-Jan-03 23:49

xxhimanshu

14-Jan-03 23:49

see links..
http://www.codeproject.com/file/

i hope you see what you want there is lots of stuff like the one you are looking for. I think there is an article about how to write log files?
hope it does the work..

cheers..

Smile | :)

Himanshu

Re: monitoring file system

Dominik Reichl15-Jan-03 0:42

Dominik Reichl

15-Jan-03 0:42

Perhaps you should have a look at FileMon by
http://www.sysinternals.com[^]

Source code is available.

Big Grin | :-D

-Dominik

Re: monitoring file system

ValentinR15-Jan-03 0:51

ValentinR

15-Jan-03 0:51

thanks Dominik
i found this application and I look at it before posting the request
the problem with that ona is that i receive a lot of events on file system wich is not needed
where can i find some explanation about 'request' column from the GUI ListView?
i only need some events of create file, delete file, modify file not such like: FSCTL_IS_VOLUME_MOUNTED
thanks in advance for your help

Re: monitoring file system

AlexO15-Jan-03 2:56

AlexO

15-Jan-03 2:56

MSDN key words : "Change notification", FindFirstChangeNotification, FindNextChangeNotification

MSDN article : "Monitoring Changes in a Directory or Directory Tree"

Timeouts - Serial communication

Daniel Strigl14-Jan-03 22:10

Daniel Strigl

14-Jan-03 22:10

Can anyone explain me somethings about the COMMTIMEOUTS struct of the SetCommTimeouts API function?

When I set the ReadIntervalTimeout member to MAXDWORD and the ReadTotalTimeoutMultiplier and ReadTotalTimeoutConstant to 0 the ReadFile operation doesn't wait. Is that right?

And what's with the Write... members? When I write 0 to this members, the timeouts will be ignored and the WriteFile function doesn't wait. Is that also right?

Daniel Wink | ;)

---------------------------
Never change a running system!

Re: Timeouts - Serial communication

Fredrik Skog15-Jan-03 1:23

Fredrik Skog

15-Jan-03 1:23

Yes, that's right.

Quoted from MSDN:

"A value of MAXDWORD, combined with zero values for both the ReadTotalTimeoutConstant and ReadTotalTimeoutMultiplier members, specifies that the read operation is to return immediately with the characters that have already been received, even if no characters have been received."

"A value of zero for both the WriteTotalTimeoutMultiplier and WriteTotalTimeoutConstant members indicates that total time-outs are not used for write operations."

Maybe you should read a little bit, eh?

Cheers,
Fredrik

"Felix qui potuit rerum cognoscere causas."

Re: Timeouts - Serial communication

KarstenK16-Jan-03 0:58

KarstenK

16-Jan-03 0:58

I am doing sometimes a little bit of serial communications. You have to read a BIG bit and test, test, test ... til u drop Dead | X|

Try this @ home. (B&B)

Graphs and Charts

Matthew R. Miller14-Jan-03 20:48

Matthew R. Miller

14-Jan-03 20:48

I have been looking for bar, line, and pie chart/graph in c++ that I can add to my project. I do not mind paying a reasonable fee, but everything I have seen is for .Net. I need c++ that can be used in my projects. Any leads?

"Best file compression around: DEL *.* = 100% compression."

<><><><><><><><><><><><><>
Matthew R. Miller
mattrmiller@computersmarts.net
www.computersmarts.net

Re: Graphs and Charts

Neville Franks15-Jan-03 0:57

Neville Franks

15-Jan-03 0:57

There are several articles here on CP including: http://www.codeproject.com/miscctrl/xgraph.asp[^] http://www.codeproject.com/useritems/3D-Pie_progress_control.asp[^] Look in the Misc Controls section: http://www.codeproject.com/miscctrl/[^]

If you can't find what you need here then you might also want to look in www.codeguru.com[^]

Failing that do a Google search. There are heaps of commercial graph controls around.

Neville Franks, Author of ED for Windows. www.getsoft.com
Make money with our new Affilate program

Re: Graphs and Charts

Matthew R. Miller15-Jan-03 4:48

Matthew R. Miller

15-Jan-03 4:48

Thank you for your efforts, unfortunately I have seen all of those with no luck. I am now searching the internet for commercial graphs. Thank you.

"Best file compression around: DEL *.* = 100% compression."

<><><><><><><><><><><><><>
Matthew R. Miller
mattrmiller@computersmarts.net
www.computersmarts.net

Re: Graphs and Charts

Nitron15-Jan-03 14:38

Nitron

15-Jan-03 14:38

Try MeasurementStudio[^] or LabView[^] @ National Instruments

- Nitron

"Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

DLL problem

Neville Franks14-Jan-03 20:17

Neville Franks

14-Jan-03 20:17

I have the following sample code in a DLL:

#define DllExport   __declspec( dllexport )

#include <vector>

class DllExport Archive
{
protected:
	std::vector<void*>  m_vPointerStored;
};

and get the following warning:

d:\libs\saiggeneric\test.h(11) : warning C4251: 'm_vPointerStored' : class 'std::vector<void *,class std::allocator<void *> >' needs to have dll-interface to be used by clients of class 'Archive'

It only seems to be a problem with STL members.

My understanding is that using __declspec( dllexport ) for a class makes the class and everything in it exportable. I'm trying to build a straight C++ DLL, not an MFC Extension DLL. I don't know if this has anything to do with the problem. Help!!!!

Neville Franks, Author of ED for Windows. www.getsoft.com
Make money with our new Affilate program

Re: DLL problem

geo_m14-Jan-03 22:25

geo_m

14-Jan-03 22:25

Look at http://support.microsoft.com/default.aspx?scid=KB;en-us;q168958[^]
HOWTO: Exporting STL Components Inside & Outside of a Class there is some description which might be usefull (but I have no time to read it, to check if it really solves your problem)

Re: DLL problem

Neville Franks15-Jan-03 0:51

Neville Franks

15-Jan-03 0:51

Thanks, that's exactly what I needed to know. I had searched around the MS Web site, but didn't find this.

Neville Franks, Author of ED for Windows. www.getsoft.com
Make money with our new Affilate program

datatype conversion

r i s h a b h s14-Jan-03 17:57

r i s h a b h s

14-Jan-03 17:57

dear all,
how can i display value of variables of sdk datatypes like DWORD, LPTSTR... in a message box

thanx

Re: datatype conversion

xxhimanshu14-Jan-03 19:40

xxhimanshu

14-Jan-03 19:40

convert into string first then you can display anything!!!!! as far as i know..

cheers..

Himanshu

Access the camera throught driver ?

TPN14-Jan-03 17:24

TPN

14-Jan-03 17:24

I want to manipulate the camera (connected to my computer) such as capturing video stream for cam chat, or video conferencing for further... So that I must know how to use, to control,... the camera throught the camera's driver. Please show me the way to start.
Thanks in advance !

aTpnT

Re: Access the camera throught driver ?

benjymous14-Jan-03 22:57

benjymous

14-Jan-03 22:57

There are examples for this in the DirectX SDK (amongst the DirectShow examples)

--
Help me! I'm turning into a grapefruit!

Re: Access the camera throught driver ?

TPN15-Jan-03 0:52

TPN

15-Jan-03 0:52

I think your reply is so useful to me. Thanks so much, 'benjymous'!

aTpnT

_MAXPATH

Paul Silvernail14-Jan-03 17:00

Paul Silvernail

14-Jan-03 17:00

Hi All,

I would like to initialize a char array to hold a path retrieved from a registry key. If I used _MAXPATH constant from stdlib.h like this .... TCHAR MyPath[_MAXPATH], would this ensure that the array will be large enough? Even on 98, XP, NT?

Thanks
Paul

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