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Visual Basic 101
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Creating a Flowchart for our Mechanical Man
Start Raise Arms Yes Touch Wall? A No
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Stand Up Yes Touch wall? B No Take One Step
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Add One to Counter Yes Turn Right Touch Wall? No Take One Step
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Subtract One from Counter
Is Counter = 0? Yes Turn Right B No
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B Sit Down A Lower Arms Stop
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Building an Application
Vocabulary Words: 1. Graphical User Interface (GUI) (pronounced “gooey”): Allows you to use both text and graphical images to communicate with the computer. Example: Microsoft Windows is called a graphical user interface.
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Application Software or Applications:
Are computer programs that perform a certain function such as calendar, word processing, or spreadsheet. Even though they are developed by different companies, they have a similar look and feel to the computer user!
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Visual Basic: Is itself a Windows application. Its function is to help you build you own special-purpose applications and application components for the Windows operating system.
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Stand-alone application (also called EXE):
Is one which runs independently of the Visual Basic system.
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Multiple document interfaced (MDI) :
Presents windows within windows and is better suited for larger monitors with higher resolutions. Single document interfaced (SDI): Presents independent windows on the desktop.
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Docked : A window that can be anchored to other windows.
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Design Time: Is the time during which you build an application with Visual Basic. Run Time: Is the time during which you use an application for its intended purpose. Project: These are the applications you build in Visual Basic.
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Form: A project always begins with a form! Objects that become the windows and dialog boxes when the application runs. Twips: A unit of measurement used to position objects on forms. There are 1440 twips in one inch.
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Controls: The command buttons, text boxes, scroll bars, and other objects that make up the user interface. Toolbox: The collection of tools that allows you to add objects to the forms you create in Visual Basic.
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Properties: Are characteristics, or attributes, of a control, such as its color or the text that displays on top if it. Events: An action taken by the user or generated by some process that causes an event-driven program to respond. They are messages sent to an object when the application runs.
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Methods: A command that directs an object to make a change to is state. Example: The SetFocus method causes the focus to be changed to a certain control on the form. Internal documentation: They are comments within the code statements, they explain how the code in the procedure works. Each comment line must begin with an apostrophe (‘) or the letters Rem.
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Let’s start using Visual Basic!
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The Properties Window Object Box Property Values Properties List
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Homework: 1.) Page 1.57 True/False questions and Multiple Choice. 2.) Page 1.58 #4 Understanding VB Toolbar and Toolbox.
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