Computer Programming Concepts and Visual Basic David I. Schneider

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410 Computer Programming Concepts and Visual Basic 13. The next window asks you to choose between Typical and Custom installations. We recommend that you click on the Typical icon. 14. About one minute is required for the VB6.0 Working Model to be installed. On the next screen to appear, click on Restart Windows. 15. The next window to appear gives you the opportunity to register your copy of VB6.0 over the web. Uncheck the Register Now box and click on Finish. B. Invoke Visual Basic after installation. 1. Click the Start button. 2. Point to Programs. 3. Point to Microsoft Visual Basic 6.0. (A new panel will open on the right.) 4. In the new panel, click on Microsoft Visual Basic 6.0. C. Exit Visual Basic. 1. Press the Esc key. 2. Press Alt/F/X. 3. If an unsaved program is present, Visual Basic will prompt you about saving it. Note: In many situations, Step 1 is not needed. HOW TO: MANAGE PROGRAMS A. Run a program from Visual Basic. 1. Click on the Start icon (right arrowhead) in the Toolbar. or 1. Press F5. or 1. Press Alt/R and make a selection from the Run menu. B. Save the current program on a disk. 1. Press Alt/F/V [or click the Save Project icon (shows a diskette) on the Toolbar]. 2. Fill in the requested information. Do not give an extension as part of the project name or the file name. Two files will be created [\m]one with extension .VBP and the other with extension .FRM. The .VBP file holds a list of files related to the project. The .FRM file actually holds the program. Note: After a program has been saved once, updated versions can be saved with the same filenames by pressing Alt/F/V. Alt/F/E and Alt/F/A are used to save the program with new file names. C. Begin a new program. 1. Press Alt/F/N. 2. If an unsaved program is present, Visual Basic will prompt you about saving it. D. Open a program stored on a disk. 1. Press Alt/F/O [or click the Open Project icon (shows an open folder) on the Toolbar]. 2. Click on one of the two tabs, Existing or Recent. 3. If you selected Existing, choose a folder for the “Look in:” box, type a filename into the “File name:”box, and press the Enter key. Alternatively, double-click on one of the filenames displayed in the large box in the middle of the dialog box.
4. If you selected Recent, double-click on one of the files in the list. Note 1: (In Steps 3 and 4, if an unsaved program is present, Visual Basic will prompt you about saving it.) Note 2: The form or code for the program may not appear, but can be accessed through the Project Explorer window. Another way to obtain the Code and Form windows is to run and then terminate the program. E. Use the Project Explorer. Note: Just below the Project Explorer title bar are three icons (View Code, View Object, and Toggle Folders), and below them is the List window. At any time, one item in the List window is selected. 1. Click on View Code to see the code associated with the selected item. 2. Click on View Object to see the Object (usually the form) associated with the selected item. F. Display the form associated with a program. 1. Press Alt/V/B. (If the selection Object is grayed, first run and then terminate the program.) or 1. Press Shift+F7. or 1. Press Alt/V/P to activate the Project Explorer window. 2. Select the name of the form. 3. Click on the View Object button. HOW TO: USE THE EDITOR A. Mark a section of text as a block. 1. Move the cursor to the beginning or end of the block. 2. Hold down a Shift key and use the direction keys to highlight a block of text. 3. Release the Shift key. or 1. Move the mouse to the beginning or end of the block. 2. Hold down the left mouse button and move the mouse to the other end of the block. 3. Release the left mouse button. Note 1: To unblock text, press a direction key or click outside the block. Note 2: To select a word, double-click on it. To select a line, move the mouse pointer just far enough into the left margin so that the pointer changes to an arrow, and then single-click there. B. Delete a line of a program. 1. Move the cursor to the line. 2. Press Ctrl+Y. or 1. Mark the line as a block. (See item A of this section.) 2. Press Alt/E/T or press Ctrl+X. Appendix B 411
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Computer Programming Concepts and V
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CONTENTS SECTION 1: PROBLEM SOLVING
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13.3 WEB PAGE PROGRAMMING WITH VBSC
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S E C T I O N 1 PROBLEM SOLVING
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4 Computer Programming Concepts and
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10 Computer Programming Concepts an
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S E C T I O N 2 FUNDAMENTALS OF PRO
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3.1 SUB PROCEDURES, PART I Structur
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The second task performed by the ad
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‘The density (number of people pe
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"Hawaii", 1184000, 6471 "Alaska", 6
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dure by just using the variable in
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Call CalculateSum(x, y, s) Call Dis
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■ FORM-LEVEL VARIABLES Visual Bas
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3. In Appendix D, the section “St
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Private Sub cmdDetermine_Click() Di
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Private Sub cmdCompute_Click() Dim
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preceded with the word ByVal. Built
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It is clear from the hierarchy char
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The meaningful procedure names, alo
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FIGURE 3-9 Sample Run for Programmi
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4.1 RELATIONAL AND LOGICAL OPERATOR
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(a) (2 < n) And (n < 6) (b) (2 < n)
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SOLUTION: In the following program,
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The Else part of an If block can be
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picTax.Cls picTax.Print “Your FIC
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Case 4, 5 picOutcome.Print “You a
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EXAMPLE 3 The following program use
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Case Else picResult.Print “The st
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4. The items in the value list must
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The hierarchy chart in Figure 4-4 s
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‘Program to compute employees’
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Private Function TaxMarried(adjPay
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and tells us whether the food meets
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S E C T I O N 5 REPETITION
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132 Computer Programming Concepts a
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S E C T I O N 6 ARRAYS
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S E C T I O N 7 SEQUENTIAL FILES
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S E C T I O N 8 RANDOM-ACCESS FILES
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S E C T I O N 9 THE GRAPHICAL DISPL
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10.1 LIST BOXES AND COMBO BOXES The
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Private Sub cmdAdd_Click() Dim item
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either typing in information or jus
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Private Sub cmdDisplay_Click() picF
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clicks on the square to toggle betw
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circle and the button is said to be
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hsbBar.Value changes accordingly. T
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THE SHAPE CONTROL The shape control
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FIGURE 10-9 A Picture Created with
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Rows 9 ScrollBars 0 - flexScrollBar
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Private Sub cmdQuit_Click() End End
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Here, the menu bar contains two men
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Clipboard.Clear deletes the content
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cedures that are available to all f
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The Flags property influences certa
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13. Additional forms serve as new w
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6. Voting Machine. The members of t
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11.1 AN INTRODUCTION TO DATABASES T
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9. Click on the down arrow to the r
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clicked or a Move, Update, Delete,
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Do While (Not foundFlag) And (Not d
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mary key. Databases of student enro
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question mark stands for a single c
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1995 populations. When the second c
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If a Find method does not locate a
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place an x in the check box next to
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population (in descending order). W
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Creating and Designing Databases 34
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9. When all fields have been specif
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Creating and Designing Databases 34
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TABLE 11.5(B) TABLE 11.5(C) course
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(a) Update the quantity field of th
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12.1 CLASSES AND OBJECTS noun A wor
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Task Statement Assign a value to a
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Page 413: A P P E N D I C E S
Page 431 and 432: APPENDIX C VISUAL BASIC STATEMENTS,
Page 433 and 434: CANCEL The Cancel property provides
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Page 439 and 440: ENVIRON Visual Basic has an environ
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Page 457 and 458: SECOND The function Second extracts
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Page 461 and 462: UNLOCK The Unlock command is intend
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466 Technology of the Internet D Da
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468 Technology of the Internet Rela
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470 Technology of the Internet 2. D
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SYSTEM REQUIREMENTS CD-ROM INSTRUCT
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Computer Programming Concepts and Visual Basic David I. Schneider

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