I have a problem on writing MFC program

[asukakilua]

I have a test2.h file to save CString b;
my purpose is write the value get from the edit control to String b
void Cdlg001::OnBnClickedButton1()
{

CString value;
seat2.GetWindowText(value);
MessageBox(_T("11111"));
((Ctest2App *)AfxGetApp())->b= "0000";
if( ((Ctest2App *)AfxGetApp())->b == "0000")
MessageBox(_T("00000"));

// TODO: Add your control notification handler code here
}
I can compile the program but the program stops at((Ctest2App *)AfxGetApp())->b= "0000";
I would like to know why the program stops at
((Ctest2App *)AfxGetApp())->b= "0000";
million thanks!
How can I make it work again?

[kbw]

1. Can you use the code formatting tag to format your code.
2. Can you post your CWinApp derived class' header file.

[asukakilua]

2. Can you post your CWinApp derived class' header file.This is the headder file code.

// test2.h : main header file for the PROJECT_NAME application
//

#pragma once

#ifndef __AFXWIN_H__
#error "include 'stdafx.h' before including this file for PCH"
#endif

#ifdef POCKETPC2003_UI_MODEL
#include "resourceppc.h"
#endif
#ifdef SMARTPHONE2003_UI_MODEL
#include "resourcesp.h"
#endif

// Ctest2App:
// See test2.cpp for the implementation of this class
//

class Ctest2App : public CWinApp
{
public:
Ctest2App();

// Overrides
public:
virtual BOOL InitInstance();

// Implementation

DECLARE_MESSAGE_MAP()

public:
int g_n_filmID;
int g_n_location;
int g_n_time;
int a;
CString b;// This is the most useful part
};

extern Ctest2App theApp;




1. Can you use the code formatting tag to format your code. what do you mean by that?
thz

[z05DSL3A]

Can you use the code formatting tag to format your code. what do you mean by that?

put [code] at the start of your code and [/code] at the end.

for example:

[code]
class Ctest2App : public CWinApp
{
public:
Ctest2App();

// Overrides
public:
virtual BOOL InitInstance();
[/code]

is displayed as

class Ctest2App : public CWinApp
{
public:
Ctest2App();

// Overrides
public:
virtual BOOL InitInstance();

[kbw]

There's nothing obviously wrong with what you've posted.

I should point out that using public data is almost always bad. Having said that, try:

void Cdlg001::OnBnClickedButton1()
{
    seat2.GetWindowText(theApp.b);
}

[asukakilua]

I just cannot pass the string to a public CString let say b

[kbw]

theApp.b is a public CString. That means the rest of the program has unfettered access to it.