18.5. Creating a Sequential-Access Text File

Visual Basic imposes no structure on files. Thus, the concept of a “record” does not exist in Visual Basic files. This means that you must structure files to meet the requirements of your applications. In the next few examples, we use text and special characters to organize our own concept of a “record.”

Class FrmBankUI

The following examples demonstrate file processing in a bank-account maintenance application. These programs have similar user interfaces, so we used the Visual Studio Form designer to create reusable base class FrmBankUI (Fig. 18.7), which encapsulates the common GUI components (see the screen capture in Fig. 18.7). Class FrmBankUI contains four Labels and four TextBoxes. Method ...

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