MODAL VS MODELESS DIALOG

Steps to create Model dialog box:

a) Create a dialog box using the resource editor.

b) Derive a class, say mydialog, from the CDialog class

c) Create an object of mydialog class and while doing so pass the resource ID of the dialog box to the constructor.

d) Call the CDialog::DoModal()function to display the dialog box.

Ex:

#include "afxwin.h"

#include "resource.h"

classmydialog:publicCDialog

{

public:mydialog(int n):CDialog(n){}

};

classMyFrame:publicCFrameWnd

{

CButton b;

public:MyFrame()

                    {

                   Create(NULL,"Simple Window");

                    }

                 intOnCreate()

                    {

                   b.Create("Display Dialog",WS_VISIBLE|WS_CHILD|BS_PUSHBUTTON,CRect(200,100,350,150),this,1);

                   return 0;

                    }

                 void display()

                    {

                   mydialog d(IDD_DIALOG1);

                   d.DoModal();

                   }

                    }

                    DECLARE_MESSAGE_MAP()

};

BEGIN_MESSAGE_MAP(MyFrame,CFrameWnd)

ON_WM_CREATE()

ON_COMMAND(1,display)

END_MESSAGE_MAP()

classMyMain:publicCWinApp

{

public:intInitInstance()

                    {

                   MyFrame *f=new MyFrame();

                   f->ShowWindow(1);

                   m_pMainWnd=f;

                   return 1;

                    }

};

MyMain m;

Steps to create Modeless dialog box:

a) Create a dialog box using the resource editor.

b) Derive a class, say mydialog, from the CDialog class

c) Create an object of mydialog class.

d) Call the CDialog::Create()function to display the dialog box while calling the function pass the resource ID of the dialog box to the function along with this pointer.

Ex:

#include "afxwin.h"

#include "resource.h"

classmydialog:publicCDialog

{

public:mydialog(){}

};

classMyFrame:publicCFrameWnd

{

                 mydialog *dl;

                 CButton b;

public:MyFrame()

                    {

                   Create(NULL,"Simple Window");

                   dl=NULL;

                    }

                 intOnCreate()

                    {

                   b.Create("Display Dialog",WS_VISIBLE|WS_CHILD|BS_PUSHBUTTON,CRect(200,100,350,150),this,1);

                   return 0;

                    }

                 void display()

                    {

                   if(dl==NULL)

                      {

                             dl=new mydialog();

                   dl->Create(IDD_DIALOG1,this);

                      }

                    }

                    DECLARE_MESSAGE_MAP()

};