Computer Programming Concepts and Visual Basic David I. Schneider

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432 Computer Programming Concepts and Visual Basic file’s DOS file handle, a number that uniquely identifies the file and is used in assembly language programming. FILECOPY The statement FileCopy source, destination creates the file specified by destination by making a copy of the file specified by source. Both source and destination may specify drive and path information. If the file specified by destination already exists, it will be overwritten without a warning being issued. FILEDATETIME The value of the function FileDateTime(filename) is a string giving the date and time that the file specified by the filename was created or last modified. FILELEN The value of the function FileLen(filename) is the length in characters (bytes) of the file specified by filename. FILENAME The FileName property of a file list box is the contents of the currently selected item. FILLCOLOR When the FillStyle property of a form or picture box is set to a value other than the default of 1, the property FillColor determines what color is used to paint the interior of ellipses and rectangles drawn with the Circle and Line graphics methods. The Fill- Color property may be assigned any valid RGB color number. The default value for FillColor is black (0). [color] FILLSTYLE The property FillStyle determines what pattern is used to paint the interior of ellipses and rectangles drawn on forms or picture boxes with the Circle and Line methods. The default value for FillStyle is transparent (1), which means that interiors are not painted. Other values available for FillStyle are solid (0), horizontal lines (2), vertical lines (3), diagonals running upward to the right (4), diagonals running downward to the right (5), vertical and horizontal lines [crosshatched] (6), and diagonal crosshatched (7). Note: Using BF in a Line method has the same effect as setting the FillStyle to 0 and the FillColor to the color of the bordering line. FINDFIRST, FINDLAST, FINDNEXT, FINDPREVIOUS A statement of the form Data1.RecordSet.FindWhat criteria selects a new current record in the table of the database associated with the data control in the expected way, based on the specifications of the string criteria. FIX The value of the function Fix(x) is the whole number obtained by discarding the decimal part of the number x. FIXEDALIGNMENT The statement MSFlexGrid1.FixedAlignment(m) = n, where n = 0 (left-align (default)), 1 (right-align), or 2 (centered), aligns the text in the fixed cells of the mth column of the grid. FIXEDCOLS and FIXEDROWS The FixedCols and FixedRows properties of a grid specify the number of fixed rows and fixed columns of a grid. Fixed rows and columns are used for headings and never disappear due to scrolling. FLAGSThe Flags property of a common dialog box sets a variety of options. FONT.BOLD or FONTBOLD These properties determine whether the characters Printed on a form, picture box, or printer, or assigned to a text box, command button, or label appear in bold or normal type. If the property is set to True (the default), then for a form, picture box, or printer, subsequent Printed characters appear bold. For a text box, command button, or label, the text or caption is immediately changed to bold. If the property is set to False, subsequent characters are Printed in normal type and characters assigned to the text or caption property change immediately to normal type. FONTCOUNT The value of the property Screen.FontCount is the number of fonts available for use on the screen. Similarly, the value of the property Printer. FontCount is the number of fonts available on the printer. The FontCount property is set according to your Windows environment and is generally used to determine the limit on the index for the Fonts property.
FONT.ITALIC or FONTITALIC These properties determine whether or not the characters Printed on a form, picture box, or printer, or assigned to a text box, command button, or label appear in italic or upright type. If the property is set to True, then for a form, picture box, or printer, subsequent characters appear in italic. For a text box, command button, or label, the text or caption is immediately changed to italic. If the property is set to False (the default), subsequent characters are Printed in upright type and characters assigned to the text or caption property change immediately to upright type. FONT.NAME or FONTNAME These properties determine what type face is used when characters are Printed on a form, picture box, or printer, or assigned to a text box, command button, or label. If the property of a form, picture box, or printer is set to a font obtained from the Fonts property, all subsequently Printed characters will appear in the new type face. When the property of a text box, command button, or label is set to a new font, characters assigned to the text or caption property change immediately to the new type face. FONTS The value of the property Screen.Fonts(fontNum) is the name of a screen font available in the current Windows environment. The index fontNum can range from 0 to Screen.FontCount–1. Similarly, the value of the property Printer.Fonts(fontNum) is the name of an available printer font. The values in the Fonts property are set by your Windows environment and are generally used to determine which fonts are available for setting the Font- Name property. FONT.SIZE or FONTSIZE These properties determine the size, in points, of characters Printed on forms, picture boxes, and the printer or displayed in text boxes and on command buttons and labels. Available font sizes depend on your Windows environment, but will always be between 1 and 2048. Default font sizes are usually between 8 and 12 point. Note: One point equals 1/72nd of an inch. FONT.STRIKETHROUGH or FONTSTRIKETHRU These properties determine whether or not the characters Printed on a form, picture box, or printer, or assigned to a text box, command button, or label appear in a strikethru or standard font. If the property is set to True, then for a form, picture box, or printer, subsequent Printed characters appear with a horizontal line through the middle of each character. For a text box, command button, or label, the text or caption is immediately changed so that a horizontal line goes through the middle of each character. If the property is set to False (the default), subsequent characters are Printed in standard type and characters assigned to text or caption property change immediately to standard type. FONTTRANSPARENT The property FontTransparent determines the degree to which characters Printed to forms and picture boxes obscure existing text and graphics. If the Font- Transparent property is set to True (the default), the existing text and graphics are obscured only by the dots (pixels) needed to actually form the new character. If the FontTransparent property is set to False, then all text and graphics are obscured within the character box (small rectangle surrounding a character) associated with the new character. Those dots (pixels) not needed to form the character are changed to the background color. FONT.UNDERLINE or FONTUNDERLINE These properties determine whether or not the characters printed on a form, picture box, or printer, or assigned to a text box, command button, or label appear with an underline. If the property is set to True, then for a form, picture box, or printer, subsequent characters Printed appear underlined. For a text box, command button, or label, the text or caption is immediately changed to underlined. If the property is set to False (the default), subsequent characters are Printed without underlines characters assigned to the text or caption property change immediately to nonunderlined. FOR EACH/NEXT A multistatement block beginning with For Each var In arrayName and ending with Next var, where arrayName is an array of type variant and var is a variant variable, executes the statements inside the block for each element of the array. Appendix C 433
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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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EXAMPLE 1 and then an instance of t
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[Run, enter the data for a student
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SOLUTION: Object Property Setting f
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4. Methods can be either Function o
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‘Student Class (CStudent) Private
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txtFinal.Text = “” picGrades.Pr
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■ EVENTS In the previous section
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frmCircles.ForeColor = vbRed ‘Mak
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Public Function X() As Integer X =
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End Sub Private Sub cmdDropBomb_Cli
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Next i End Sub Public Function Read
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Page 391: S E C T I O N 13 COMMUNICATING WITH
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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 475 and 476: 466 Technology of the Internet D Da
Page 477 and 478: 468 Technology of the Internet Rela
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Page 481: SYSTEM REQUIREMENTS CD-ROM INSTRUCT
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Computer Programming Concepts and Visual Basic David I. Schneider

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