C / C++ / MFC Discussion Boards

Re: How to avoid from ListCtrl flickering???

eli1502197913-Jul-05 2:02

eli15021979

13-Jul-05 2:02

Hi Neelesh,

Thanks for your prompt reply.
Do you have any example how to do this?
How should I use the CustomDraw message handler?

Regards,
Eli

Re: How to avoid from ListCtrl flickering???

Neelesh K J Jain13-Jul-05 2:09

Neelesh K J Jain

13-Jul-05 2:09

Eli,
you can see the article "Dynamically Highlight Elements in a List Control" at http://www.codeproject.com/listctrl/highlightlistctrl.asp

Neelesh K J Jain

Re: How to avoid from ListCtrl flickering???

David Crow13-Jul-05 2:59

David Crow

13-Jul-05 2:59

How about a call to SetRedraw() before and after the insert/delete operations?

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: How to avoid from ListCtrl flickering???

Jack Puppy13-Jul-05 2:59

Jack Puppy

13-Jul-05 2:59

I'd try this first:

SetRedraw

If you still get flicker, try drawing offscreen:

Flicker free drawing of any control

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Re: How to avoid from ListCtrl flickering???

Bert [Otherside82] Derijckere13-Jul-05 3:04

Bert [Otherside82] Derijckere

13-Jul-05 3:04

You can disable the painting on the list control with SetRedraw(FALSE);
I'm using this technique when updating my list controls.

m_lstCtrl.SetRedraw(FALSE);
m_lstCtrl.DeleteAllItems();
//Add all new items
...
m_lstCtrl.SetRedraw(TRUE);
//you might need this to force the redraw to happen faster:
//m_lstCtrl.UpdateWindow();

IMO this is easier than trying to implement Custom or Owner Draw

how to make the application starts with the system?

zhaopi12-Jul-05 23:13

zhaopi

12-Jul-05 23:13

I am trying to implement an mfc dialog based application which will start when the system starts up just like a windows service...

Re: how to make the application starts with the system?

Andrew Kirillov12-Jul-05 23:21

Andrew Kirillov

12-Jul-05 23:21

Hello

You can place your app path into registry under the key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

Andrew

Re: how to make the application starts with the system?

AntonlioX13-Jul-05 21:16

AntonlioX

13-Jul-05 21:16

Another Method is to place a shortcut of your application on the directory "startup"

AntonlioX

icon in task bar???

wasife12-Jul-05 19:57

wasife

12-Jul-05 19:57

I have made an application. Now i want to put its icon in the right corner of my task bar. How can i do that? Moreover, how can i display my own tooltip when i hover my mouse over that icon in the taskbar.

Re: icon in task bar???

khan++12-Jul-05 20:15

khan++

12-Jul-05 20:15

http://www.thecodeproject.com/shell/trayicons.asp[^]
It shows the systray icon when the app is minimized.

this is this.

Re: icon in task bar???

David Crow13-Jul-05 3:00

David Crow

13-Jul-05 3:00

See this thread.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

troubles in making a filecopy program in visual c++

firebolt7712-Jul-05 19:43

firebolt77

12-Jul-05 19:43

hi all..I'm newbie in visual c++ and I'm trying to make a simple file copy program, but it doesn't work. Here is my source code:
#include<afx.h>
#include<stdio.h>

int main()
{
CFile m_LogFile,m_DataFile;
char* a=NULL;
m_DataFile.Open("E:/data.txt", CFile::modeRead|CFile::shareDenyNone);
try
{
m_LogFile.Open("E:/data1.txt", CFile::modeWrite|CFile::modeRead|CFile::modeCreate|CFile::modeNoTruncate|CFile::shareDenyNone);
m_LogFile.SeekToEnd();
}
catch(CException* e)
{
e->ReportError();
e->Delete();
}
m_DataFile.Read(a,m_DataFile.GetLength);
m_LogFile.Write(a,strlen(a));
return 0;
}

The message error said that the m_DataFile.Read(a,m_DataFile.GetLength); part is wrong, but when I change the 2nd parameter into fixed number(I tried 10 and 100), it generate other error. Can somebody help me?
thx

Re: troubles in making a filecopy program in visual c++

Christian Graus12-Jul-05 19:50

Christian Graus

12-Jul-05 19:50

I can't find it, but there is most certainly an API call you can make to copy a file, if you want to. In the meantime, m_DataFile.GetLength is a function pointer. m_DataFile.GetLength() is a function call.

Christian Graus - Microsoft MVP - C++

Re: troubles in making a filecopy program in visual c++

Aamir Butt12-Jul-05 20:40

Aamir Butt

12-Jul-05 20:40

It is CopyFile(...) Smile | :)

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Re: troubles in making a filecopy program in visual c++

Christian Graus13-Jul-05 12:18

Christian Graus

13-Jul-05 12:18

Thanks - I thought it was, but I did a google on CopyFile C++ and got no helpful links. Usually, MSDN is the first hit in a case like that.

Christian Graus - Microsoft MVP - C++

Re: troubles in making a filecopy program in visual c++

khan++12-Jul-05 19:58

khan++

12-Jul-05 19:58

1- Change m_DataFile.Read(a,m_DataFile.GetLength); to:
m_DataFile.Read(a,m_DataFile.GetLength());
because GetLength() is a function.

2- And also, you are using char* a = NULL;
You are not assigning any memory to it. It is a null pointer.
You can try this:
char* a = NULL;
a = m_DataFile.GetLength() + 1;
memset(a,0,m_DataFile.GetLength()+1);
Then read the file into it:
m_DataFile.Read(a,m_DataFile.GetLength());

this is this.

Re: troubles in making a filecopy program in visual c++

firebolt7712-Jul-05 20:19

firebolt77

12-Jul-05 20:19

I already change the source code..but it is still error. This is my source code:
#include<afx.h>
#include<stdio.h>
#include<memory.h>

int main()
{
CFile m_LogFile,m_DataFile;
char* a=NULL;
m_DataFile.Open("E:/data.txt", CFile::modeRead|CFile::shareDenyNone);
try
{
m_LogFile.Open("E:/data1.txt", CFile::modeWrite|CFile::modeRead|CFile::modeCreate|CFile::modeNoTruncate|CFile::shareDenyNone);
m_LogFile.SeekToEnd();
}
catch(CException* e)
{
e->ReportError();
e->Delete();
}
memset(a,0,m_DataFile.GetLength()+1);
m_DataFile.Read(a,m_DataFile.GetLength());
m_LogFile.Write(a,strlen(a));
return 0;
}

n the program generate these errors:
nafxcwd.lib(thrdcore.obj) : error LNK2001: unresolved external symbol __endthreadex
nafxcwd.lib(thrdcore.obj) : error LNK2001: unresolved external symbol __beginthreadex
Debug/excel.exe : fatal error LNK1120: 2 unresolved externals
Error executing link.exe.

excel.exe - 3 error(s), 0 warning(s)

n I don't understand what it's means...pls help.
thx

Re: troubles in making a filecopy program in visual c++

munawar196812-Jul-05 20:53

munawar1968

12-Jul-05 20:53

If you're using VC 6. do the following:
Menu item Project->Settings->Tab C++ -> Category 'Code Generation'->
set this option to 'Multithreaded' or 'Debug Multithreaded'

Re: troubles in making a filecopy program in visual c++

firebolt7712-Jul-05 22:59

firebolt77

12-Jul-05 22:59

I already change the code generation into multithreaded. The program can be compiled successfully but when I run it, it generate an error and can't run. Give me some hints please. Is there any logic error on my program?
The reason that I didn't use CopyFile is if the program works, I'm planning to make a program that can make XML file from text file which I think it can't be done using CopyFile function.
thx.

Re: troubles in making a filecopy program in visual c++

David Crow13-Jul-05 3:06

David Crow

13-Jul-05 3:06

firebolt77 wrote:
...when I run it, it generate an error and can't run.

And what would that error be?

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: troubles in making a filecopy program in visual c++

David Crow13-Jul-05 3:11

David Crow

13-Jul-05 3:11

firebolt77 wrote:
n the program generate these errors:
nafxcwd.lib(thrdcore.obj) : error LNK2001: unresolved external symbol __endthreadex
nafxcwd.lib(thrdcore.obj) : error LNK2001: unresolved external symbol __beginthreadex
Debug/excel.exe : fatal error LNK1120: 2 unresolved externals
Error executing link.exe.

Remove the /MT linker option.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: troubles in making a filecopy program in visual c++

Bob Stanneveld13-Jul-05 4:19

Bob Stanneveld

13-Jul-05 4:19

No, he is using MFC, but he made a console application. So the default settings cause the linker not to link with the MFC libraries. He should change that setting to link dynamically or statically to the MFC.

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Re: troubles in making a filecopy program in visual c++

David Crow13-Jul-05 5:43

David Crow

13-Jul-05 5:43

If that was the case, the linker would be complaining about MFC-related code instead of __endthreadex and __beginthreadex. See here for more.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: troubles in making a filecopy program in visual c++

Bob Stanneveld13-Jul-05 20:27

Bob Stanneveld

13-Jul-05 20:27

I sometimes used MFC in an application that was not linking to the MFC libraries. The only unresolved external symbols that I had were the __beginthreadex and __endthreadex.

I thought that that was the problem, since he is using the CFile class from MFC. There are numerous ways to generate the same error, however.

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Re: troubles in making a filecopy program in visual c++

Trollslayer12-Jul-05 21:58

Trollslayer

12-Jul-05 21:58

A simple trick - when you want to see if a function exists to do something go Help->Index and try typing in possible function names. As you type more letters it narrows the results.
"Filecopy" didn't return anything but "Copyfile" returned
CopyFile(LPCTSTR lpExistingFileName, LPCTSTR lpNewFileName, BOOL bFailIfExists)

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