thank you sanjaylk. it really helped. Regards Jawad

hi, i am using multiple Check Boxes in my GUI and i wanted that only one gets checked at a time i.e when one Check Box gets checked by user the others should automatically get unchecked. i can't use Radio Buttons since i don't find its "Auto" check and uncheck from "Behavior" in its "Properties" in vs2008. any help in this regards please. Regards Jawad

thak you so much pasztorpisti. that was really helpful :-) Regards Jawad

sorry, i didn't understand. what kind of bug we are talking about? i didn't understand the reason behind this. can you please tell me why this behavior is happening (i.e running fine in debug mode but in release mode, opens one port and not the other)? Regards Jawad

thank you pasztorpisti for your reply. i configured my project to release mode from Configuration Manager and did what you earlier suggested. it builds without errors but when i run exe file, one of the serial ports does not open and gives error 0x7B (system error code). it runs fine (both serial ports open) when build in debug mode. any idea what is happening? Regards Jawad

hi, i have developed program using MFC in vs2008 and now trying to build single executable file (.exe file) so that it can be used on other PCs. my source file contains both .c and .cpp files. i have tried to compile/build the program in Release mode but getting errors like:

fatal error C1853: 'Release\readtxtfile.pch' precompiled header file is from a previous version of the compiler, or the precompiled header is C++ and you are using it from C (or vice versa)

so i changed the properties of precompiled header from Use Precompiled Header (/Yu) to Create Precompiled Header (/Yc) and now i'm getting errors like:

error C2857: '#include' statement specified with the /Ycstdafx.h command-line option was not found in the source file

can anyone help me in this regard. i.e how to make executable file with source file containing both .c and .cpp files. Regards Jawad

thank you Richard MacCutchan.

hi, i have developed program where two separate windows, one containing Map and other the dialog form with some controls, are opened. the program is when i click on Map window, its coordinates are displayed in the static text on the dialog form window. what i want is that when i click on Map window (which is at the front at the time of clicking) the dialog form window should appear at the front showing the results of my click, i.e the coordinates. Regards Jawad

thanks you Richard MacCutchan for your replies. that was really helpful.

i'm new in programming, specially in MFC. my understanding of handle is weak. so can you please help me in this regard. means how to pass the handle of dialog window to SetDlgItemText()? any example please. Regards Jawad

hi, i am developing code using Opencv and MFC in vs 2008. i am getting error:

error C2660: 'SetDlgItemTextW' : function does not take 2 arguments

the complete code is:

//headers files included

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

void mouseEvent( int evt, int x, int y, int flags, void* param );

class CAboutDlg : public CDialog
{
public:
CAboutDlg();
.......
.......
protected:
.......
}:
........
........
........

BEGIN_MESSAGE_MAP(Copencv01Dlg, CDialog)
.......
.......
END_MESSAGE_MAP()

// Copencv01Dlg message handlers

BOOL Copencv01Dlg::OnInitDialog()
{
CDialog::OnInitDialog();

       ........
       ........

MoveWindow(0, 0, 500, 500, 1);
AfxBeginThread(MyThreadProc, this);
return TRUE;  

}

UINT Copencv01Dlg::MyThreadProc(LPVOID pParam)
{
Copencv01Dlg * me = (Copencv01Dlg *)pParam;
me->MyThreadProc();
return TRUE;
}

void Copencv01Dlg::MyThreadProc()
{

cvNamedWindow("MyWindow");

    //assigning the callback function for mouse events
    cvSetMouseCallback("MyWindow", mouseEvent, 0);
    IplImage\* img = cvLoadImage("box.png");
    cvShowImage("MyWindow", img);
    cvWaitKey(0);
    cvDestroyWindow("MyWindow");
    cvReleaseImage(&img);

}

void Copencv01Dlg::OnSysCommand(UINT nID, LPARAM lParam)
{
........
........
}

void Copencv01Dlg::OnPaint()
{
.........
.........
}

HCURSOR Copencv01Dlg::OnQueryDragIcon()
{
return static_cast(m_hIcon);
}
void mouseEvent(int evt, int x, int y, int flags, void* param)
{
if(evt==CV_EVENT_LBUTTONDOWN){
CString cx, cy;
cx.Format(_T("%d"), x);
cy.Format(_T("%d"), y);
SetDlgItemTextW(IDC_Blue, cx); //error generating line
SetDlgItemTextW(IDC_Green, cy); //error generating line
}
}

can anyone help me with this errors? Regards Jawad

hi, i'm still stuck with the dialog handle. i have posted the complete code. please i need help. Regards Jawad

hi, i'm still stuck with the dialog handle. i have posted the complete code. please i need help. Regards Jawad

thank you Richard MacCatchan for replies. i have implemented MFC based application using picture control. i have included bitmap image in picture control and have defined subclass where i have used OnLButtonDblClk to get the co-ordinates of picture control (not image u know) in static box. and it works fine. but i have some questions and need help. 1. how to implement zoom in/out an the scroll option (for large image sizes)? 2. when applying zoom in/out, will the pixel co-ordinates change (i mean if a point is lying on say (x,y) in picture control before zoom in what will happen to its co-ordinates after zoom in)? Regards JAwad

thank you Richard MacCutchan for your replies. i did use m_hWnd in SetDlgItemText() in first place, but at that time it gave the error as m_hWnd :undeclared identifier. you see i'm using a thread to call mouse function. do i need to redefine m_hWnd?? if yes, where??

can you please elaborate it because i didn't get your point i.e "pre-defined CWnd::m_hWnd[^] variable which contains the handle to your object's window." you see, i'm not good in programming with handles. :(

i have checked it with some other examples. works fine. but for this program it does not display the coordinates in static boxes. am i defining the handle HWND hwnd correctly??

hi, below is the complete code that i have developed using opencv with MFC in vs2008. it builds fine and after debugging it shows two different windows, one containing image and other containing static boxes. the purpose of this code is to display image coordinates (x,y) in static boxes but when i double click on the image window (which is my mouse event), values of (x,y) coordinates are not displayed in the static boxes (static boxes are in the separate window). please pardon my mistakes.

#include "stdafx.h"
#include "opencv01.h"
#include "opencv01Dlg.h"
#include "highgui.h"
#include "afxwin.h"
#include "cv.h"
#include "math.h"
#include

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

void on_mouse( int evt, int x, int y, int flags, void* param ); //defining mouse event
HWND hwnd; //defining handle

class CAboutDlg : public CDialog
{
public:
CAboutDlg();

enum { IDD = IDD\_ABOUTBOX };

protected:
virtual void DoDataExchange(CDataExchange\* pDX);    // DDX/DDV support

protected:
DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
END_MESSAGE_MAP()

Copencv01Dlg::Copencv01Dlg(CWnd* pParent /*=NULL*/)
: CDialog(Copencv01Dlg::IDD, pParent)
{
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void Copencv01Dlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(Copencv01Dlg, CDialog)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

// Copencv01Dlg message handlers

BOOL Copencv01Dlg::OnInitDialog()
{
CDialog::OnInitDialog();
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000);

CMenu\* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
	CString strAboutMenu;
	strAboutMenu.LoadString(IDS\_ABOUTBOX);
	if (!strAboutMenu.IsEmpty())
	{
		pSysMenu->AppendMenu(MF\_SEPARATOR);
		pSysMenu->AppendMenu(MF\_STRING, IDM\_ABOUTBOX, strAboutMenu);
	}
}

SetIcon(m\_hIcon, TRUE);			// Set big icon
SetIcon(m\_hIcon, FALSE);		// Set small icon


AfxBeginThread(MyThreadProc, this); //calling thread

return TRUE;  // return TRUE  unless you set the focus to a control

}

UINT Copencv01Dlg::MyThreadProc(LPVOID pParam)
{
Copencv01Dlg * me = (Copencv01Dlg *)pParam;
me->MyThreadProc();
return TRUE;

hi, below is the complete code that i have developed. it builds fine and after debugging it shows two different windows, one containing image and other containing static boxes. but when i double click on the image window (which is my mouse event), values of (x,y) coordinates are not displayed in the static boxes (static boxes are in the separate window). please pardon my mistakes.

#include "stdafx.h"
#include "opencv01.h"
#include "opencv01Dlg.h"
#include "highgui.h"
#include "afxwin.h"
#include "cv.h"
#include "math.h"
#include

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

void on_mouse( int evt, int x, int y, int flags, void* param ); //defining mouse event
HWND hwnd; //defining handle

class CAboutDlg : public CDialog
{
public:
CAboutDlg();

enum { IDD = IDD\_ABOUTBOX };

protected:
virtual void DoDataExchange(CDataExchange\* pDX);    // DDX/DDV support

protected:
DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
END_MESSAGE_MAP()

Copencv01Dlg::Copencv01Dlg(CWnd* pParent /*=NULL*/)
: CDialog(Copencv01Dlg::IDD, pParent)
{
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void Copencv01Dlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(Copencv01Dlg, CDialog)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

// Copencv01Dlg message handlers

BOOL Copencv01Dlg::OnInitDialog()
{
CDialog::OnInitDialog();
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000);

CMenu\* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
	CString strAboutMenu;
	strAboutMenu.LoadString(IDS\_ABOUTBOX);
	if (!strAboutMenu.IsEmpty())
	{
		pSysMenu->AppendMenu(MF\_SEPARATOR);
		pSysMenu->AppendMenu(MF\_STRING, IDM\_ABOUTBOX, strAboutMenu);
	}
}

SetIcon(m\_hIcon, TRUE);			// Set big icon
SetIcon(m\_hIcon, FALSE);		// Set small icon


AfxBeginThread(MyThreadProc, this); //calling thread

return TRUE;  // return TRUE  unless you set the focus to a control

}

UINT Copencv01Dlg::MyThreadProc(LPVOID pParam)
{
Copencv01Dlg * me = (Copencv01Dlg *)pParam;
me->MyThreadProc();
return TRUE;
}

void Copencv01Dlg::MyThreadProc()
{
//image initialization

IplImage\* img = cvLoadImage("box.png", CV\_WINDOW\_AUTOSIZE);

sorry for not well explained actually the problem is that static box does not show any value when mouse is being clicked. means it remains unchanged as it was. Jawad