Computer Programming Concepts and Visual Basic David I. Schneider

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314 Computer Programming Concepts and Visual Basic FIGURE 10-14 A Save As Common Dialog Box FIGURE 10-15 A Color Common Dialog Box FIGURE 10-16 A Font Common Dialog Box FIGURE 10-17 A Print Common Dialog Box
The Flags property influences certain features of the dialog box and should be set prior to setting the Show method. A complete discussion of the Flags property would be too great a digression. For our purposes, we will be well served by always setting the Flags property to 3 with the statement dlgBox.Flags = 3 After selections are made from a common dialog box and the OK button is clicked, the values of the selections are stored in properties such as FileName, Color, FontName, FontItalic, FontSize and Copies. For instance, the following event procedure specifies the font for the contents of a text box. Private Sub cmdButton_Click() dlgFont.Flags = 3 dlgFont.ShowFont ‘invoke Font common dialog box ‘Select Font, Font style, and Size and then click on OK txtBox.Font.Name = dlgFont.FontName txtBox.Font.Bold = dlgFont.FontBold txtBox.Font.Italic = dlgFont.FontItalic txtBox.Font.Size = dlgFont.FontSize End Sub Table 10.2 gives the principal properties whose setting are garnered from the common dialog boxes. TABLE 10.2 Principal Properties of the Common Dialog Boxes Type of Common Dialog Box Principal Properties Open FileName Save As FileName Color Color Font FontName, FontSize, FontBold, FontItalic Print Copies, FromPage, ToPage With Open and Save As common dialog boxes, a property is needed to specify what types of files should be displayed. A statement of the form dlgFile.Filter = “dscrpt1|filter1|dscrpt2|filter2|dscrpt3|filter3“ provides verbal descriptions for the Type box and strings using wildcard characters (filters) to identify the files. A specific statement might be dlgFile.Filter = “Text Files|*.TXT|FRM Files|*.FRM|All Files|*.*” After the filter property is set, the FilterIndex property can be used to set the default filter. For instance, if the preceding statement is followed with dlgFile.FilterIndex = 1 the default will be the first pair of filter items. That is, when the dialog box pops up, the Files of type box will display Text Files, and the large box will show only files with the extension TXT. COMMENT 1. In the Properties window of a FlexGrid control, one setting of the GridLines property is “0 – flexGridNone.” In code, this setting can be invoked with either Five Additional Objects 315
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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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Page 272 and 273: 264 Computer Programming Concepts a
Page 295 and 296: 10.1 LIST BOXES AND COMBO BOXES The
Page 297 and 298: Private Sub cmdAdd_Click() Dim item
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Page 301 and 302: Private Sub cmdDisplay_Click() picF
Page 303 and 304: clicks on the square to toggle betw
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Page 307 and 308: hsbBar.Value changes accordingly. T
Page 309 and 310: THE SHAPE CONTROL The shape control
Page 311 and 312: FIGURE 10-9 A Picture Created with
Page 313 and 314: Rows 9 ScrollBars 0 - flexScrollBar
Page 315 and 316: Private Sub cmdQuit_Click() End End
Page 317 and 318: Here, the menu bar contains two men
Page 319 and 320: Clipboard.Clear deletes the content
Page 321: cedures that are available to all f
Page 325 and 326: 13. Additional forms serve as new w
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Page 331 and 332: 11.1 AN INTRODUCTION TO DATABASES T
Page 333 and 334: 9. Click on the down arrow to the r
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Page 337 and 338: Do While (Not foundFlag) And (Not d
Page 339 and 340: mary key. Databases of student enro
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Page 345 and 346: If a Find method does not locate a
Page 347 and 348: place an x in the check box next to
Page 349 and 350: population (in descending order). W
Page 351 and 352: Creating and Designing Databases 34
Page 353 and 354: 9. When all fields have been specif
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Page 357 and 358: TABLE 11.5(B) TABLE 11.5(C) course
Page 359: (a) Update the quantity field of th
Page 363 and 364: 12.1 CLASSES AND OBJECTS noun A wor
Page 365 and 366: Task Statement Assign a value to a
Page 367 and 368: EXAMPLE 1 and then an instance of t
Page 369 and 370: [Run, enter the data for a student
Page 371 and 372: 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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Remove method. The number of object
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S E C T I O N 13 COMMUNICATING WITH
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A P P E N D I C E S
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APPENDIX C VISUAL BASIC STATEMENTS,
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CANCEL The Cancel property provides
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COLS and ROWS The Cols and Rows pro
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DEFINT, DEFLNG, DEFSNG, DEFDBL, DEF
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ENVIRON Visual Basic has an environ
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FONT.ITALIC or FONTITALIC These pro
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yields “1234.”, Format(1234000,
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the length of the string currently
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ISNUMERIC The value of the function
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Unlock statement is used to remove
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Focus Default Default Number First
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OR (Logical Operator) The logical e
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the same as in the original Dimensi
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SECOND The function Second extracts
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STRETCH When the Stretch property o
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UNLOCK The Unlock command is intend
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[COLOR]: Numbers written in base 16
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Appendix D 457
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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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