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Visual Basic 6.0. Designing an Application in VB 6.0. Objectives in this lesson. Define a Procedure Oriented application and show examples – (procedur.exe) Define an OOED (Object Oriented/Event Driven) Application and show an example Steps to Creating an OOED Application

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visual basic 6 0

Visual Basic 6.0

Designing an Application in VB 6.0

objectives in this lesson
Objectives in this lesson
  • Define a Procedure Oriented application and show examples – (procedur.exe)
  • Define an OOED (Object Oriented/Event Driven) Application and show an example
  • Steps to Creating an OOED Application
  • Steps to Planning an OOED Application
  • Design Tips for the Application
  • Exercise:
    • Create a TOE chart of the Skate Away Sales Order Form
    • Sketch the Interface (in the back of the sheet)
procedure oriented application
Procedure Oriented Application
  • Applications where the emphasis is on how to accomplish a task.
  • Programmer must instruct the computer every step of the way, from start to finish.
  • Requires that the program think in a step-by-step, top to bottom approach.
  • Limitations:
    • User has very little control over the data entered
  • Sample apps: procedur.exe (under tut02 folder)
ooed object oriented event driven application
OOED – Object Oriented Event Driven Application
  • Emphasis is on the objects and events included in the user interface
  • Goal is to give the user as much control over the application as possible.
  • Does not require that the programmer work in a step by step, top to bottom approach.
  • Sample apps: OOED.exe (on the TUT02 folder)
steps to create an ooed application
Steps to create an OOED application
  • Plan the application
  • Build the user interface
  • Write the code for the application
  • Test and debug the application
  • Assemble the documentation
steps to planning an ooed application
Steps to planning an OOED application
  • Identify the tasks, objects and events using a TOE chart (Task, Objects, Events)\
    • The programmer creates objects and events for all the tasks needed and names them.
    • The programmers sketches the application using one of these methods:
      • Writing pseudocodes
      • Flowcharts
design tips for an ooed application
Design tips for an OOED application
  • Information should flow vertically or horizontally, with the most important information at the top left.
  • Commands buttons should be grouped together, along the bottom of the screen or lower right corner.
  • Use no more than six command buttons
  • Use meaning and short captions (one to three words) in buttons
  • Label each control. Align labels to the left , short, and one line only.
exercise sketch the skate away application
Exercise: Sketch the Skate Away Application
  • Using the sales order handout, do the following
    • Write a TOE chart (decide how many controls to use and name them.
    • Sketch the user interface in the back of the page.