Re: To check and Create Folder in Win32 API - C / C++ / MFC Discussion Boards

Re: motion detection

Rajesh R Subramanian12-Jan-07 2:26

Rajesh R Subramanian

12-Jan-07 2:26

Interesting project. Must be some 2 lines of code, but I can't get it now! Big Grin | :-D

Nobody can give you wiser advice than yourself. - Cicero
ப்ரம்மா

Re: motion detection

Cool Ju12-Jan-07 2:48

Cool Ju

12-Jan-07 2:48

Hi,

Are the frames captured color? If it is color then image subtraction is time consuming. I would suggest you convert ur color images to monorchrome amd use image subtraction.

Adios,
Cool Ju Cool | :cool:

Dream Ur Destiny

Re: motion detection

ceejeeb12-Jan-07 4:33

ceejeeb

12-Jan-07 4:33

yes they are in color at the moment. So how do i convert them to monochrome and then how to i do image subtraction?

Re: motion detection

Cool Ju13-Jan-07 4:12

Cool Ju

13-Jan-07 4:12

Hi,

Google it. This article would be much help to you.

Motion Detection[^]

Adios,
Cool Ju Cool | :cool:

Dream Ur Destiny

Re: motion detection

Hamid_RT22-May-07 19:23

Hamid_RT

22-May-07 19:23

See Motion Detection Algorithms[^] does it helpful for you? Smile | :)

WhiteSky

To check and Create Folder in Win32 API

Suresh H12-Jan-07 0:39

Suresh H

12-Jan-07 0:39

Hello all,

I want to check for some folder in C:\ drive if that folder exists by default then no action if that folder does not exits I have to create the folder. For that I have used below code

CFileFind finder; <br />
	CString szPath , szCMD; <br />
	szPath = "c:\\A\\B";<br />
	if(!finder.FindFile(szPath)) <br />
        {  <br />
		szCMD = "mkdir "; <br />
		szCMD += szPath;  <br />
		system((LPCTSTR)szCMD); <br />
	}<br />
<br />

This code properly in MFC application , I want to know how to do it in Win32 API application??

Please help me with this problem.

Thanking you,
Suresh HC.

Re: To check and Create Folder in Win32 API

CPallini12-Jan-07 0:55

CPallini

12-Jan-07 0:55

You may use FindFirstFile API.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Re: To check and Create Folder in Win32 API

Rajesh R Subramanian12-Jan-07 1:07

Rajesh R Subramanian

12-Jan-07 1:07

#include "shlwapi.h"

TCHAR szDir[20];

_tcscpy( szDir,_T("D:\\MyNewDir\\") );

if(!PathFileExists(szDir))<font color=green>//the directory already exists</font>
   if( CreateDirectory(szDir,NULL) )
         <font color=green>//MessageBox(NULL,_T("Created"),NULL,MB_OK);</font>

PS: You will need to link to shlwapi.lib for using PathFileExists()

Nobody can give you wiser advice than yourself. - Cicero
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Re: To check and Create Folder in Win32 API

Suresh H12-Jan-07 1:50

Suresh H

12-Jan-07 1:50

Thank you guys CPallini , brahmma , WhiteSky , James R. Twine thanks for the examples.

Now I modified the code to as follows

<br />
int ret;<br />
<br />
char buf[ ] = "C:\\A\\B"; <br />
char *lpStr;<br />
lpStr = buf;<br />
ret = PathFileExists(lpStr);<br />
if(ret == 1)<br />
{<br />
   CreateDirectory(lpStr,NULL);    <br />
}

How to link shlwapi.lib file to code ???

I am getting below error

error LNK2001: unresolved external symbol __imp__PathFileExistsA@4
fatal error LNK1120: 1 unresolved externals

Re: To check and Create Folder in Win32 API

Hamid_RT12-Jan-07 2:01

Hamid_RT

12-Jan-07 2:01

Open property window of your project and include lib file to it(I dont have vs2003 now) but I think its on linker additional path(its first item on right panel)

WhiteSky

Re: To check and Create Folder in Win32 API

Suresh H12-Jan-07 2:11

Suresh H

12-Jan-07 2:11

Thanks WhiteSky i did the changes its working now.

Thank you very much.

Re: To check and Create Folder in Win32 API

PJ Arends12-Jan-07 9:36

PJ Arends

12-Jan-07 9:36

Suresh H wrote:
How to link shlwapi.lib file to code ???

When you include the header file simply add a pragma to link the lib

#include <shlwapi.h>
#pragma comment(lib, "shlwapi.lib")

Lot easier than mucking around in the project settings and you will never forget it if you reuse the file in another project.

You may be right
I may be crazy
-- Billy Joel --

Within you lies the power for good, use it!!!

Re: To check and Create Folder in Win32 API

Hamid_RT12-Jan-07 1:14

Hamid_RT

12-Jan-07 1:14

See PathFileExists

WhiteSky

Re: To check and Create Folder in Win32 API

James R. Twine12-Jan-07 1:32

James R. Twine

12-Jan-07 1:32

   IF the directory has to exist regardless of it being there already or your having to create it, just call ::CreateDirectory(...)! If the directory already exists, it will return an error, if it does not, it will attempt to create it.

   No need for all that other crap unless you really need to know if it exists beforehand.

   Peace!

-=- James
Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles

Re: To check and Create Folder in Win32 API

Cristian Amarie13-Jan-07 4:35

Cristian Amarie

13-Jan-07 4:35

Use CreateFile with OPEN_EXISTING to detect if directory exists, and, if not, use CreateDirectory(Ex) to create it.

Nuclear launch detected

Retrieve jpg file from Access database

Vishvanathan12-Jan-07 0:39

Vishvanathan

12-Jan-07 0:39

Hi gents,

I want to retrieve image (jpg) file from access database using VC++,
Class:
CDaoDatabase and CDaoRecordset class.

In mdb file. the image stored in Long binary data format.

Sample Code:

COleVariant var;
var = m_recordset.GetFieldValue ( "AF_Photo" );

if ( var.vt == ( VT_ARRAY | VT_UI1 ) )
{

str1.Empty ( );
BYTE* pBytes = new BYTE[var.parray->rgsabound[0].cElements];
void HUGEP *pvData;
HRESULT hr = SafeArrayAccessData(var.parray, &pvData);
for ( int ncount = 0 ; ncount < (var.parray->rgsabound[0].cElements);
ncount++ )
{
pBytes[ncount ] = ( ( BYTE* ) (pvData) ) [ ncount ] ;
}
hr = SafeArrayUnaccessData(var.parray);

outfile.open ( "D:\\Vichu\\Vichu.jpg", ios::out );
for ( int i = 0; i < size; i++ )
outfile << pBytes [ i ];
outfile.close ( );
delete [] pBytes;

Is this code correct or not ?

If correct, that file is not open.

What is the exact solution for this problem ?

I am waiting for your response.

Thanks & Regards,
K.Vishvanathan.

Vichu

Re: Retrieve jpg file from Access database

CPallini12-Jan-07 3:01

CPallini

12-Jan-07 3:01

You never check returned values, does you?
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Re: Retrieve jpg file from Access database

Vishvanathan12-Jan-07 4:01

Vishvanathan

12-Jan-07 4:01

hi,

Yes pallini,But the file pointer wrote some bianry string into that jpg file.

Are the program statments correct ?

Please give clear solution for this issue.

Thanks and Regards,
K.Vishvanathan.

Vichu

GET_X_LPARAM

Astricks12-Jan-07 0:08

Astricks

12-Jan-07 0:08

Why do I get "undeclared identifier" error when I try to use "GET_X_LPARAM" Macro? Unsure | :~

. In the requirement(MSDN), they have specified :

<br />
Header Declared in Winuser.h, include Windows.h <br />
Minimum operating systems Windows 95, Windows NT 3.1 <br />

I have XP.

Re: GET_X_LPARAM

toxcct12-Jan-07 0:22

toxcct

12-Jan-07 0:22

ca you show a piece of the code around, + the exact error message/code please ?
also, what version of MFC do you use ?

Don't know where to start ?
Refer the Forums Guidelines and ask a friend

[VisualCalc 3.0][Flags Beginner's Guide]

Re: GET_X_LPARAM

CPallini12-Jan-07 0:34

CPallini

12-Jan-07 0:34

On my env (Visual Studio 6), I can find the macro defined in windowsx.h header.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

CWinThread and leak

NorGUI11-Jan-07 23:39

NorGUI

11-Jan-07 23:39

Hallo,

I have a thread that use object , when I end the thread the object used into the thread do not call the destructor and the let me some leak !

Why the object m_OPCServer & m_OPCStock are not destructed when I stop the thread ?

What can I change into my code that those object will be destructed!

The code:

CWinThread* newthread=NULL;

stop=false;

newthread=AfxBeginThread(ThreadAddOpcServer,LPVOID(&stop),THREAD_PRIORITY_BELOW_NORMAL ,0,CREATE_SUSPENDED );
newthread->ResumeThread();

UINT ThreadAddOpcServer(LPVOID nparam)
{
bool* sstop=static_cast<bool*>(nparam);

static int i=10;

OPCServer m_OPCServer;
StockIOWINCC m_OPCStock(&m_OPCServer);

double movevalue=0;

while(!*sstop) {
m_OPCStock.ChangeStatus("INTERN\\test_opc2",movevalue++);
m_OPCStock.ChangeStatus("INTERN\\test_opc1",10*movevalue);

}

AfxEndThread(0,true);

return 0;

}

Thank for help

AutreChien

Re: CWinThread and leak

Cedric Moonen11-Jan-07 23:50

Cedric Moonen

11-Jan-07 23:50

First, when you post code, please use the 'code' tag above the emoticons, it will make your code much more readable.

Second point: why using AfxEndThread ? Your function is finished so your thread will exit. Thus why calling AfxEndThread ?

Third point: you have a loop which check for a flag. But are you setting this flag to false in another thread ? If yes, how are you doing that ? Can you post some code ?

Cédric Moonen
Software developer

Charting control [v1.1]

Re: CWinThread and leak

toxcct12-Jan-07 0:38

toxcct

12-Jan-07 0:38

Cedric Moonen wrote:
First, when you post code, please use the 'code' tag above the emoticons

no Cedric, he should use the 'pre' tag ! lol

Don't know where to start ?
Refer the Forums Guidelines and ask a friend

[VisualCalc 3.0][Flags Beginner's Guide]

Re: CWinThread and leak

NorGUI12-Jan-07 0:54

NorGUI

12-Jan-07 0:54

Yes I set from button click the variable stop (global variable) as true

void CTestOPCServerDlg::OnBnClickedOk()
{
// TODO: Add your control notification handler code here
stop=true;

OnOK();
}

Thank you for your help!

AutreChien

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