C / C++ / MFC Discussion Boards

Neville Franks16-Nov-03 9:59

16-Nov-03 9:59

Andy Latham wrote:
I need to do this as well but for me the function returns zero and so does GetLastError() after it. What am i missing?

This doesn't make sense, unless maybe you aren't:

ncm.cbSize = sizeof(NONCLIENTMETRICS);

before calling SystemParametersInfo().

Neville Franks, Author of ED for Windows. Free Trial at www.getsoft.com

Detecting User Logon

Jonathan [Darka]13-Nov-03 0:15

Jonathan [Darka]

13-Nov-03 0:15

Hi all,

Does anyone know how to programmatically (from a Service) detect when a new user has logged on under Windows NT / 2000 / XP, etc.

regards,

Darka

Re: Detecting User Logon

David Crow13-Nov-03 4:05

David Crow

13-Nov-03 4:05

Search MSDN and the Internet for GINA. I believe that is what you are looking for.

Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?

CtreeCtrl

Member 42425912-Nov-03 23:54

Member 424259

12-Nov-03 23:54

Hello Friends,
I am Having a tree ctrl in a dialog box now when i set the checkbox property of the tree ctrl then there is a very Long Horizontal scroll bar at the bottom of the TreeCtrl. This scroll bar is very long even if the length of the string is small
Can anyone help me out in removing the scroll but i want the Vetical Scroll...

Thanx
TAKE CARE

Re: CtreeCtrl

valikac13-Nov-03 9:15

valikac

13-Nov-03 9:15

Check resource editor.

Kuphryn

Re: CtreeCtrl

Member 42425913-Nov-03 18:28

Member 424259

13-Nov-03 18:28

You have given me a very big Hint but i didnt get sorry...
If you can specify some details then it would be helpful for me to solve the problem..
awating reply

Thanx
TAKE CARE

Preferred size for memory block alloc?

Dominik Reichl12-Nov-03 22:58

Dominik Reichl

12-Nov-03 22:58

Hi!

in my program I often have to allocate and dellocate buffers for strings. For this, I thought I could avoid memory fragmentation by using an own memory allocation routine which will allocate some more bytes than needed, so many as needed to fill a full block.

What is the best size for such a "full" block?

Thanks in advance!
Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

Re: Preferred size for memory block alloc?

Anand Paranjpe12-Nov-03 23:49

Anand Paranjpe

12-Nov-03 23:49

If u r using string from STL, it gives facility of reserving memory space.
Read more on Function reserve().
This will suffice the need.

The chosen One Smile | :)

Re: Preferred size for memory block alloc?

Dominik Reichl13-Nov-03 1:16

Dominik Reichl

13-Nov-03 1:16

No, I am not using STL. I allocate the memory using 'new' and pointing with a char* to it.

Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

Re: Preferred size for memory block alloc?

David Crow13-Nov-03 4:17

David Crow

13-Nov-03 4:17

Would it be of any benefit to only allocate the memory once and just reuse it?

Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?

Re: Preferred size for memory block alloc?

Dominik Reichl13-Nov-03 4:26

Dominik Reichl

13-Nov-03 4:26

The maximum size of a string is variable (it could just be one character or 2000 for example). Also there isn't any string number limit (only one string or more than 1000).

So I need to allocate them dynamically.

Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

Re: Preferred size for memory block alloc?

David Crow13-Nov-03 5:27

David Crow

13-Nov-03 5:27

That's fine. I was just trying to ascertain whether you could minimize the impact on the memory manager. One idea, which is how MFC's CString class works, is to only reallocate when necessary. Something like:

char *pBuffer;
int amount_currently_allocated = 0;
 
while (...)
{
    amount_needed = ???;
 
    if (amount_needed > amount_currently_allocated)
    {
        delete [] pBuffer;
        pBuffer = new char[amount_needed];
        amount_currently_allocated = amount_needed;
    }
 
    ...
}

Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?

Re: Preferred size for memory block alloc?

Dominik Reichl13-Nov-03 7:33

Dominik Reichl

13-Nov-03 7:33

DavidCrow wrote:
Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?

2 ???

Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

TCP Problem

graham the programmmer12-Nov-03 22:24

graham the programmmer

12-Nov-03 22:24

I have a problem with the net use /d cmd in NT, basically we have an application that runs a batch file to map a drive to a unix box on startup -

net use z: \\servername\sharename password username /persistent:no

the on close down it removes the mapping using -

net use z: /d

after this if I try to remap the drive I get the following error -

System error 1312 has occurred.

A specified logon session does not exist. It may already have
been terminated.

This seems to be caused by the fact that the TCP session is not closed by the net use /d, if I close it using a util called tcpview by systems internals I can then reconnect.

Does any one know of a utility that will let me close a TCP port from the cmd prompt, I have been trying to write one myself but although I can create a connection, list the TCP connections etc I can't seem to work out how to connect to and close an existing connection created by another process.

Any Ideas? i'm stuck.

Re: TCP Problem

Alexander ^M.,13-Nov-03 8:05

Alexander ^M.,

13-Nov-03 8:05

hmmm, i don't think, that this is a question for the visual c++ forum!

Don't try it, just do it! Wink | ;-)

How to Catch or Retries processes before Task Manager.

Anonymous12-Nov-03 22:03

Anonymous

12-Nov-03 22:03

Hi everybody.
My problem.
Catch or retries Processes when execute file .EXE.
I had used functoin WaitForDebugEvent(...) but can't.
Please tell me
Thank you.

Re: How to Catch or Retries processes before Task Manager.

Peter Molnar13-Nov-03 14:10

Peter Molnar

13-Nov-03 14:10

http://www.codeproject.com/threads/processapi.asp[^]
This is a tool for Process enumeration, you can regularly check whether your exe is running or not.

Your program can get called when you modify the default value of this registry key:

HKEY_CLASSES_ROOT\exefile\shell\open\command

Its value should be:

"c:\\pathtoyourexe.exe" %*

Your exe will receive the path to the app which the user double clicked on the command line.

Bunburry

CBrush::CreatePatternBrush limitations?

CodeBrain12-Nov-03 21:52

CodeBrain

12-Nov-03 21:52

I want to create my own pattern brush, but I got a little bit confused by the MSDN documentaion.

The documentation of the CBrush::CreatePatternBrush methods says there is a general limitation for the pattern bitmap of 8x8 Pixel. Ok so far, but the documentation of the corresponding API function CreatePatternBrush says that this limitation is only valid for Window 95 and that larger bitmaps will work for Win98, 2000 and XP:
"Windows 95: Creating brushes from bitmaps or DIBs larger than 8 by 8 pixels is not supported. If a larger bitmap is specified, only a portion of the bitmap is used.
Windows 98/Me and Windows NT/2000/XP: Brushes can be created from bitmaps or DIBs larger than 8 by 8 pixels."

So what's true? Does the limitation exists if I use the MFC method, but not if I use the API function??? Confused | :confused:

Thanks in advance for clarifying this confusion.

Re: CBrush::CreatePatternBrush limitations?

Mike Dimmick13-Nov-03 3:17

Mike Dimmick

13-Nov-03 3:17

It's often educational to read the MFC source code Wink | ;)

CBrush::CreatePatternBrush is a simple wrapper around the API function, and hence has the same limitations. The MFC documentation simply doesn't indicate that newer versions of Windows don't have this limitation.

Re: CBrush::CreatePatternBrush limitations?

CodeBrain13-Nov-03 3:31

CodeBrain

13-Nov-03 3:31

Thanks for the answer. Fortunately this confirms my knowledge about MFC Big Grin | :-D

I also got this answer using trial-and-error.

How can I Enable Drag&Drop of IE URL's in my prog

PlasmaJam12-Nov-03 21:51

PlasmaJam

12-Nov-03 21:51

I would like a program I am working on to be abel to accept dropped URL's from f.i. IExplorer. But DragAcceptFiles only seems to enable the dropping of local files. When I try to drag an URL to my app window it I get a 'no drop' mouse pointer.
I know it can be done, VC can do it and several other apps I use as well.
I hope someone can help! Thanks.

New Fonts for VC++ 6

dushkin12-Nov-03 21:29

dushkin

12-Nov-03 21:29

Hi there,
Does anyone know how to add new fonts to the very limited number of fonts in VC++ 6 ? Any add-in or a procedure?
Best Regards, Dushkin. D'Oh! | :doh:

Getting MIME Format

derzellner12-Nov-03 20:38

derzellner

12-Nov-03 20:38

Hello,
is there any way to get an email in the mime format by using
outlook automation and C++(wrapper classes ...)?

Thanks for helping !

crystalreport date field.

murali_utr12-Nov-03 20:31

murali_utr

12-Nov-03 20:31

hi,
for replaceselectionformula i compare date field. following statement
m_report.ReplaceSelectionFormula("{customer_master.lastrent}>'2003-11-13'")
i got error of incorrect formula. what's the error any one help to me.

Thanks in advance.

Murali.M

Re: crystalreport date field.

Steve S12-Nov-03 22:49

Steve S

12-Nov-03 22:49

It might not be converting '2003-11-13' correctly into a date by assuming YYYY-MM-DD. I think there's a function in CR you can use to convert from a string to a date, or alternatively, you could use a parameter which has the date type.

Steve S

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