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Visual Basic Project 1

Visual Basic Project 1. IDS 306 Spring 1999 V. Murphy. User Interfaces & Applications. User Interface -- way in which you give instructions to a computer and receive feedback Graphical User Interface (GUI) -- allows use of both text and graphical images

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Visual Basic Project 1

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  1. Visual BasicProject 1 IDS 306 Spring 1999 V. Murphy

  2. User Interfaces & Applications • User Interface -- way in which you give instructions to a computer and receive feedback • Graphical User Interface (GUI) -- allows use of both text and graphical images • Application software -- computer programs that perform a specific function

  3. Control Creation Edition • available for download from • http://msdn.microsoft.com/vbasic/downloads/cce/default.asp • http://www.download.com • can not make .exe files • Stand-alone application -- a.k.a. an EXE, runs independently of the VB system • should contain all the features you will need for this class

  4. Development Environment • Integrated Development Environment (IDE) • Single document interface (SDI) -- independent windows on the desktop • Multiple document interface (MDI) -- windows within windows; contained within single parent window

  5. Design Time vs. Run Time • Design time -- time during which you build an application • Run time -- time during which you use an application for its intended purpose • Title bar will say [design] during design time and [run] during run time

  6. Projects and Forms • Project (.vbp) • starts with a form • may contain several forms • Form (.frm) • becomes the application window during run time

  7. 3 Steps in Creating Applications 1. Create the Interface 2. Set the Properties 3. Write the Code

  8. Writing Code • Events -- messages sent to an object when the application runs • can be initiated by user or by application • trigger procedures • Procedures -- groups of code statements • Code Statements -- instructions to computer, written at design time, execute at run time • Event procedures in VB written in blocks of code called subroutines

  9. Function, Methods & Comments • Function -- code that transforms one or more values into a new value • Val function -- takes whatever value is given and converts it to a number • Methods -- code statements that can be applied to an object to change its attributes or behavior • SetFocus method -- causes focus to be changed to a specific control on a form • Comment -- explanatory text within a procedure • begins with an apostrophe (‘) or keyword Rem

  10. Tables & Figuresexcluded from this version • Figure 1-1 page 1.5 • Figure 1-25 page 1.16 • Figure 1-46 page 1.25 • Figure 1-63 page 1.34 • Figure 1-83 page 1.44 • Figure 1-88 page 1.46

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