Solved

C++ Code

Posted on 2011-02-15
4
310 Views
Last Modified: 2012-08-14
if (MessageDlg(prompt, mtConfirmation, TMsgDlgButtons() << mbYes << mbNo, 0) == mrYes)

What does the code in bold mean? This is Borland C++, though it shouldn't matter. I am trying to figure if TMsgDlgButtons() is accepting parameters?? or is the << operator used as left shit bit operator?? Or anything else. Pls assume very little C++ experience.
0
Comment
Question by:olmuser
  • 2
  • 2
4 Comments
 
LVL 40

Accepted Solution

by:
evilrix earned 125 total points
ID: 34897517
It looks like whatever TMsgDlgButtons() returns (whether it is a function or a constructor for that type) it has overloaded the << operator to allow the setting of values in one operation. In this case it looks like the object is being primed to accept a Yes and No user input (so, it probably displays those buttons).
0
 
LVL 1

Author Comment

by:olmuser
ID: 34897826
This is what the official help document says:

TMsgDlgButtons defines a set of values used by MessageDlg and MessageDlgPos.

Unit

Dialogs

enum TMsgDlgBtn { mbYes, mbNo, mbOK, mbCancel, mbAbort, mbRetry, mbIgnore, mbAll, mbNoToAll, mbYesToAll, mbHelp };
0
 
LVL 1

Author Comment

by:olmuser
ID: 34916756
Can someone help me link the Help page with the actual usage in C++ terms?
0
 
LVL 40

Expert Comment

by:evilrix
ID: 34921228
State what is it you specifically don't understand and I'll try to make it clearer for you.
0

Featured Post

Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Unlike C#, C++ doesn't have native support for sealing classes (so they cannot be sub-classed). At the cost of a virtual base class pointer it is possible to implement a pseudo sealing mechanism The trick is to virtually inherit from a base class…
Written by John Humphreys C++ Threading and the POSIX Library This article will cover the basic information that you need to know in order to make use of the POSIX threading library available for C and C++ on UNIX and most Linux systems.   [s…
The goal of the video will be to teach the user the concept of local variables and scope. An example of a locally defined variable will be given as well as an explanation of what scope is in C++. The local variable and concept of scope will be relat…
The viewer will learn additional member functions of the vector class. Specifically, the capacity and swap member functions will be introduced.

776 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question