What is the return value of the MFC dialog box?

Unless you overload the domodal function, the return value can only be the standard two.

In fact, it makes no sense to modify this rebate value by using the modal dialog box that domodal pops up, because after domodal returns, you can still access the member variables of the mydlg dialog class (note, do not use interface-related control variables) to get the data, as long as you are in the onok function of mydlg (or other member functions can also be used), assign the value to a custom class member variable, and domodal can get the actual assignment after that.

Add the following to the button's message handler

onbutton1(）

getdlgitem（idc_button2)->enablewindow(false);Button 1 is made unavailable when button 1 is clicked (gray).

Multiple buttons can also be implemented with reference to this **, to make the button available again, use getdlgitem(idc button2)->enablewindow(true);

int rlt = ;

if(idok == rlt)

OK the button is pressed, do something? }

if(idcancel == rlt)

The cancel button is pressed, what to do?

The return value of the dialog box identifies the reason why the dialog box exited.

Normally cdialog::d omodal() is to call the window, if you need to return a value, usually idok, to determine whether the current window is determined, in fact, msdn is the best teacher, all of the above.

Generally speaking, modal dialogs call cdialog::enddialog(int); The end.

onok() generated by template; and oncancel(); corresponding to enddialog(idok); and enddialog(idcancel);

The following is the definition of the end code of the general dialog box, and the corresponding meaning can be seen in English.

#define idok 1

#define idcancel 2

#define idabort 3

#define idretry 4

#define idignore 5

#define idyes 6

#define idno 7

#if(winver >=0x0400)

#define idclose 8

#define idhelp 9

endif *winver >=0x0400 * You can also define your own end code, and then the function that calls the dialog will determine the result.

It depends on what you're doing with it.

To get this value, you can use a judgment statement to determine the value of this bb, and then perform related operations, if you want to see the value of bb, you can use a messagebox to pop it.

Here you go :

int bb=3;

test addtest;

int ret=;See what the ret return value isif(idok == ret).

else

What is returned is the ID of the button on the pop-up dialog you clicked.

For example, if you click the cancel button on the pop-up dialog box, the ID of the button is idcancel, and the return value is idcancel

Look up MSDN.

The main ones are as follows:

1 The dialog box was not created successfully.

IDABRAT: Click "ABORT" and press "OK".

idcancel click the "Cancel" button.

As mentioned upstairs, commonly used: idok, idcancel

You can define a global variable a, let a = your string, and then your parent window is free to use the string a.

Add the function of get data to the dialog box where the button is located, and the return value is cstring, and you can call the member function of this class in the tab tag to get the return value.

It's okay if the function type isn't void, and it has nothing to do with whether it's MFC or not.