May 2014
Beginner
960 pages
26h 46m
English
Content preview from Ivor Horton's Beginning Visual C++ 2013
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Chapter 13Working with Menus and Toolbars
- How an MFC-based program handles messages
- How you create and modify menu resources
- How you create and modify menu properties
- How to create functions to service menu messages
- How to add handlers to update menu properties
- How to add toolbar buttons associated with menu items
You can find the wrox.com code downloads for this chapter on the Download Code tab at www.wrox.com/go/beginningvisualc. The code is in the Chapter 13 download and individually named according to the names throughout the chapter.
COMMUNICATING WITH WINDOWS
Windows communicates with your program by sending messages to it. Most of the drudgery of message handling is taken care of in an MFC application, so you don’t have to worry about providing a WndProc() function. The MFC enables you to provide functions to handle the individual messages that you’re interested in and to ignore the rest. These functions are referred to as message handlers or just handlers. In an MFC-based program, a message handler is always a member of one of your application’s classes.
The association between a particular message and a function in your program that is to service it is established by a message map, and each class in your program that handles Windows messages will have one. A message map is a table of member functions that handle messages bounded by a couple of macros. The start of a message map is indicated ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.