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INTRODUCTION TO DATABASE APPLICATIONS
In this section, we define a dialog and tab order that is the order in which the controls will be navigated during the execution. The DDX (dialog data exchange) mechanism is used to transfer the data from controls to variables and vice versa. Different controls like animate control, combo control, list box control, tree control, slider control are used. The inheritance of the CtreeCtrlView is used to create tree control. Database access using the Open Database Connectivity (ODBC) is explained in this section. The Cdatabase and CrecordSet MFC classes for accessing the database are also covered in Database applications.
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Retrieval Methods: There are 3 ways to find a document. The primary method is a positional retrieval. This is achieved by keeping in mind where you left it. The next method is
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
Each piece of data is passed in your process using an argument. Arguments serve like placeholders for the data you wish to pass into your process. You can name your arguments along
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
Executesql: The ExecuteSQL is used for executing the query on the database. The CRecordset uses the RFX mechanism to replace data between field data members of the record set
DDX - Dialog Data Exchange: The Data members can be related with specific controls in the dialog box. When the dialog box is displayed, the DDX will transfer the values into t
CONTROL ARRAY The control array is a group of similar objects with similar name. Adding controls with control arrays uses less resource than simply adding the multiple controls
The View: The view is used for visualising. For illustration, while performing word processing, the user works on a sequence of words which compose the text. If a user is perf
PROJECT TO CREATE SPLITTER WINDOW 1. Generate the SDI application. 2. Enlarge the class tab page. 3. Select the view class. 4. On right clicking the menu pops up.
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