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Message Handling:
1. The message is send to the window. And it is sent to the Window Procedure.
2. The message map holds all the message handlers.
3. The window procedure looks for the message map for the handler for the received message.
4. The CWnd :: WindowProc calls the handler and passes the significant message parameters.
5. If the message handler is not in the message map, then the default message handler, that is, CWnd::DefWindowProc is called. The DefWindowProc handler gives the default behavior like moving, sizing for all the windows.
Write an event procedure to automate the billing system of a supermarket. Give the details of database tables, forms, controls and menu design (if any). Make assumptions, wherever
STEPS TO CREATE A RECTANGLE IN THE CLIENT REGION 1. Generate a SDI application and name it as a brush. 2. Handle the WM_LBUTTONDOWN message for the CBrushView object id.
DIALOG BOXES IN VB The two dialog boxes, namely, the message box and the input box are usually used in the Visual Basic. The message box is used for displaying the messages to
THE PRECOMPILED HEADER FILE As soon as you generate a blank project, ahead of doing any coding you compile the project to generate .pch (that is the pre compiled header) file a
Adding Handlers With Class Wizard: Whenever a handler is added, the class wizard places the prototype for the message handler in the header (.H) file. It gives a skeleton hand
DEVICE CONTEXT The device context provides the essential drawing tools and the platform to draw. It helps to draw the text, shapes, lines etc. To create the device context, the
Write a XML with database with book details (BOOK ID, Title, Author, subject, published Year, language, vendor, price)
THE MFC CLASSES The CDocument, CWinAppCFrameWnd and CView are derived from the CObject and they give the majority of the structure and functionality.
Option Explicit Declaration: If the option explicit is used essentially then all the variables will have to be declared. Or else an error will be reported saying that the vari
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