How to create nested dialog boxes in MFC?

[zellster]

Hi all,

I'm a complete beginner to using MFC. I am currently creating simple applications, and trying to improve my knowledge.

I'm having a problem with creating usable buttons within child dialog boxes of the main dialog. The button in the second dialog box should link to a 3rd dialog box when it is clicked...but it doesn't work. Can anyone tell me what I'm doing wrong?

#include <afxwin.h>
#include <afxdlgs.h>
#include "resource1.h"

class CWindowApp : public CWinApp
{
public:
BOOL InitInstance();
};

class CWindowDlg : public CDialog
{
public:
enum { IDD = IDD_DIALOG1 };

CWindowDlg();
~CWindowDlg();
DECLARE_MESSAGE_MAP()
afx_msg void OnBnClickedButton1();
};

CWindowDlg::CWindowDlg() : CDialog(CWindowDlg::IDD)
{
}

CWindowDlg::~CWindowDlg()
{
}


class CWindowDlg2 : public CDialog
{
public:
enum { IDD = IDD_DIALOG2 };

CWindowDlg2();
~CWindowDlg2();
DECLARE_MESSAGE_MAP()
afx_msg void OnBnClickedButton2();
};

CWindowDlg2::CWindowDlg2() : CDialog(CWindowDlg2::IDD)
{
}

CWindowDlg2::~CWindowDlg2()
{
}

class CWindowDlg3 : public CDialog
{
public:
enum { IDD = IDD_DIALOG3 };

CWindowDlg3();
~CWindowDlg3();
};

CWindowDlg3::CWindowDlg3() : CDialog(CWindowDlg3::IDD)
{
}

CWindowDlg3::~CWindowDlg3()
{
}


BOOL CWindowApp::InitInstance()
{
CWindowDlg Dlg;

m_pMainWnd = &Dlg;
Dlg.DoModal();

return TRUE;
}

CWindowApp theApp;

BEGIN_MESSAGE_MAP(CWindowDlg, CDialog)
ON_BN_CLICKED(IDC_BUTTON1, &CWindowDlg::OnBnClickedButton1)
END_MESSAGE_MAP()

void CWindowDlg::OnBnClickedButton1()
{
// TODO: Add your control notification handler code here
CDialog dlg(IDD_DIALOG2);
dlg.DoModal();
}
BEGIN_MESSAGE_MAP(CWindowDlg2, CDialog)
ON_BN_CLICKED(IDC_BUTTON2, &CWindowDlg2::OnBnClickedButton2)
END_MESSAGE_MAP()

void CWindowDlg2::OnBnClickedButton2()
{
// TODO: Add your control notification handler code here
CDialog dlg2(IDD_DIALOG3);
dlg2.DoModal();
}

[S_M_A]

If you use code tags [code][/code] instead of quote the code indentation is preserved.

The first you always should do is to check how the function you use informs you in case of a failure. For DoModal GetLastError returns the reason for the failure. See http://msdn.microsoft.com/en-us/library/619z63f5.aspx