Computer Programming Concepts and Visual Basic David I. Schneider

Recommendations

Info

418 Computer Programming Concepts and Visual Basic lines. If the text box is not tall enough, lines will scroll up out of view, but can be redisplayed by moving the cursor up.) H. Assign an access key to a label or command button. 1. When assigning a value to the Caption property, precede the desired access key character with an ampersand (&). I. Allow a particular command button to be activated by a press of the Enter key. 1. Set the command button’s Default property to True. Note: Setting the Default property True for one command button automatically sets the property to False for all the other command buttons on the form. J. Adjust the order in which the Tab key moves the focus. 1. Select the first control in the tabbing sequence. 2. Change the setting of the TabIndex property for this control to 0. 3. Select the next control in the tabbing sequence. 4. Change the setting of the TabIndex property for this control to 1. 5. Repeat Steps 3 and 4 (adding 1 to the Tab Index property) until all controls on the form have been assigned a new TabIndex setting. Note: In Steps 2 and 4, if an object is moved to another position in the sequence, then the TabIndex property for the other objects will be renumbered accordingly. K. Allow the pressing of Esc to activate a particular command button. 1. Set the command button’s Cancel property to True. (Setting the Cancel property to True for one command button automatically sets it to False for all other command buttons.) L. Keep the contents of a picture box from being erased accidentally. 1. Set the picture box’s AutoRedraw property to True. (The default is False. Unless the property is set to True, the contents will be erased when the picture box is obscured by another window.) HOW TO: MANAGE PROCEDURES A. Access the Code window. 1. Press Alt/V/C or F7. (If the Code window does not appear, run and then terminate the program.) or 1. Press Alt/V/P to activate the Project Explorer window. 2. Select the name of the form. 3. Click on the “View Code”button. B. Look at an existing procedure. 1. Access the Code window. 2. Press Ctrl+Down Arrow or Ctrl+Up Arrow to see all the procedures. or 1. Access the Code window. 2. Click on the down arrow at the right of the Object box and then select an object. [For general procedures select (General) as the Object.]
3. Click on the down arrow at the right of the Procedure box and then select a procedure. C. Create a general procedure. 1. Access the Code window. 2. Move to a blank line that is not inside a procedure. 3. Type Private Sub (for a Sub procedure) or Private Function (for a Function procedure) followed by the name of the procedure and any parameters. 4. Press the Enter key. (The Code window will now display the new procedure heading and an End Sub or End Function statement.) 5. Type the procedure into the Code Window. or 1. Access the Code window. 2. Press Alt/T/P. (A dialog box will appear.) 3. Type the name of the procedure into the Name rectangle. 4. Select the type of procedure. 5. Select the Scope by clicking on Public or Private. (In this book, we always use Private.) 6. Press the Enter key. (The Code window will now display the new procedure heading and an End Sub or End Function statement.) 7. Type the procedure into the Code Window. D. Alter a procedure. 1. View the procedure in the Code Window as described in item B of this section. 2. Make changes as needed. E. Remove a procedure. 1. Bring the procedure into the Code Window as described in item B of this section. 2. Mark the entire procedure as a block. That is, a. Press Ctrl+PgUp to move the cursor to the beginning of the procedure. b. Hold down the Shift key and press Ctrl+PgDn to move the cursor to the start of the next procedure. c. Press the Up Arrow key until just after the end of the procedure to be deleted. 3. Press the Del key. F. Insert an existing procedure into a program. 1. Open the program containing the procedure. 2. View the procedure in the Code Window as described in item B of this section. 3. Mark the entire procedure as a block, as described in step 2 of item E of this section. 4. Press Ctrl+C to place the procedure into the clipboard. 5. Open the program in which the procedure is to be inserted and access the Code Window. 6. Move the cursor to a blank line. 7. Press Ctrl+V to place the contents of the clipboard into the program. Appendix B 419
Page 1 and 2:
Computer Programming Concepts and V
Page 3 and 4:
CONTENTS SECTION 1: PROBLEM SOLVING
Page 5:
13.3 WEB PAGE PROGRAMMING WITH VBSC
Page 9:
S E C T I O N 1 PROBLEM SOLVING
Page 12 and 13:
4 Computer Programming Concepts and
Page 14 and 15:
Page 16 and 17:
Page 18 and 19:
10 Computer Programming Concepts an
Page 20 and 21:
Page 23:
S E C T I O N 2 FUNDAMENTALS OF PRO
Page 26 and 27:
Page 28 and 29:
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Page 36 and 37:
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
Page 46 and 47:
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
Page 54 and 55:
Page 56 and 57:
Page 58 and 59:
Page 60 and 61:
Page 62 and 63:
Page 64 and 65:
Page 66 and 67:
Page 68 and 69:
Page 70 and 71:
Page 72 and 73:
Page 74 and 75:
Page 76 and 77:
Page 78 and 79:
Page 81 and 82:
3.1 SUB PROCEDURES, PART I Structur
Page 83 and 84:
The second task performed by the ad
Page 85 and 86:
‘The density (number of people pe
Page 87 and 88:
"Hawaii", 1184000, 6471 "Alaska", 6
Page 89 and 90:
dure by just using the variable in
Page 91 and 92:
Call CalculateSum(x, y, s) Call Dis
Page 93 and 94:
■ FORM-LEVEL VARIABLES Visual Bas
Page 95 and 96:
3. In Appendix D, the section “St
Page 97 and 98:
Private Sub cmdDetermine_Click() Di
Page 99 and 100:
Private Sub cmdCompute_Click() Dim
Page 101 and 102:
preceded with the word ByVal. Built
Page 103 and 104:
It is clear from the hierarchy char
Page 105 and 106:
The meaningful procedure names, alo
Page 107:
FIGURE 3-9 Sample Run for Programmi
Page 111 and 112:
4.1 RELATIONAL AND LOGICAL OPERATOR
Page 113 and 114:
(a) (2 < n) And (n < 6) (b) (2 < n)
Page 115 and 116:
SOLUTION: In the following program,
Page 117 and 118:
The Else part of an If block can be
Page 119 and 120:
picTax.Cls picTax.Print “Your FIC
Page 121 and 122:
Case 4, 5 picOutcome.Print “You a
Page 123 and 124:
EXAMPLE 3 The following program use
Page 125 and 126:
Case Else picResult.Print “The st
Page 127 and 128:
4. The items in the value list must
Page 129 and 130:
The hierarchy chart in Figure 4-4 s
Page 131 and 132:
‘Program to compute employees’
Page 133 and 134:
Private Function TaxMarried(adjPay
Page 135 and 136:
and tells us whether the food meets
Page 137:
S E C T I O N 5 REPETITION
Page 140 and 141:
132 Computer Programming Concepts a
Page 142 and 143:
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Page 150 and 151:
Page 152 and 153:
Page 154 and 155:
Page 156 and 157:
Page 158 and 159:
Page 160 and 161:
Page 162 and 163:
Page 164 and 165:
Page 167:
S E C T I O N 6 ARRAYS
Page 170 and 171:
Page 172 and 173:
Page 174 and 175:
Page 176 and 177:
Page 178 and 179:
Page 180 and 181:
Page 182 and 183:
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
Page 202 and 203:
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 212 and 213:
Page 214 and 215:
Page 216 and 217:
Page 218 and 219:
Page 220 and 221:
Page 223:
S E C T I O N 7 SEQUENTIAL FILES
Page 226 and 227:
Page 228 and 229:
Page 230 and 231:
Page 232 and 233:
Page 234 and 235:
Page 236 and 237:
Page 238 and 239:
Page 240 and 241:
Page 242 and 243:
Page 244 and 245:
Page 246 and 247:
Page 248 and 249:
Page 251:
S E C T I O N 8 RANDOM-ACCESS FILES
Page 254 and 255:
Page 256 and 257:
Page 258 and 259:
Page 260 and 261:
Page 262 and 263:
Page 265:
S E C T I O N 9 THE GRAPHICAL DISPL
Page 268 and 269:
Page 270 and 271:
Page 272 and 273:
Page 274 and 275:
Page 276 and 277:
Page 278 and 279:
Page 280 and 281:
Page 282 and 283:
Page 284 and 285:
Page 286 and 287:
Page 288 and 289:
Page 290 and 291:
Page 292 and 293:
Page 295 and 296:
10.1 LIST BOXES AND COMBO BOXES The
Page 297 and 298:
Private Sub cmdAdd_Click() Dim item
Page 299 and 300:
either typing in information or jus
Page 301 and 302:
Private Sub cmdDisplay_Click() picF
Page 303 and 304:
clicks on the square to toggle betw
Page 305 and 306:
circle and the button is said to be
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 and 322:
cedures that are available to all f
Page 323 and 324:
The Flags property influences certa
Page 325 and 326:
13. Additional forms serve as new w
Page 327:
6. Voting Machine. The members of t
Page 331 and 332:
11.1 AN INTRODUCTION TO DATABASES T
Page 333 and 334:
9. Click on the down arrow to the r
Page 335 and 336:
clicked or a Move, Update, Delete,
Page 337 and 338:
Do While (Not foundFlag) And (Not d
Page 339 and 340:
mary key. Databases of student enro
Page 341 and 342:
question mark stands for a single c
Page 343 and 344:
1995 populations. When the second c
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
Page 355 and 356:
Creating and Designing Databases 34
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
Page 373 and 374:
4. Methods can be either Function o
Page 375 and 376: ‘Student Class (CStudent) Private
Page 377 and 378: txtFinal.Text = “” picGrades.Pr
Page 379 and 380: ■ EVENTS In the previous section
Page 381 and 382: frmCircles.ForeColor = vbRed ‘Mak
Page 383 and 384: Public Function X() As Integer X =
Page 385 and 386: End Sub Private Sub cmdDropBomb_Cli
Page 387 and 388: Next i End Sub Public Function Read
Page 389 and 390: Remove method. The number of object
Page 391: S E C T I O N 13 COMMUNICATING WITH
Page 394 and 395: 386 Computer Programming Concepts a
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
Page 435 and 436: COLS and ROWS The Cols and Rows pro
Page 437 and 438: DEFINT, DEFLNG, DEFSNG, DEFDBL, DEF
Page 439 and 440: ENVIRON Visual Basic has an environ
Page 441 and 442: FONT.ITALIC or FONTITALIC These pro
Page 443 and 444: yields “1234.”, Format(1234000,
Page 445 and 446: the length of the string currently
Page 447 and 448: ISNUMERIC The value of the function
Page 449 and 450: Unlock statement is used to remove
Page 451 and 452: Focus Default Default Number First
Page 453 and 454: OR (Logical Operator) The logical e
Page 455 and 456: the same as in the original Dimensi
Page 457 and 458: SECOND The function Second extracts
Page 459 and 460: STRETCH When the Stretch property o
Page 461 and 462: UNLOCK The Unlock command is intend
Page 463 and 464: [COLOR]: Numbers written in base 16
Page 465 and 466: Appendix D 457
Page 475 and 476: 466 Technology of the Internet D Da
Page 477 and 478:
468 Technology of the Internet Rela
Page 479 and 480:
470 Technology of the Internet 2. D
Page 481:
SYSTEM REQUIREMENTS CD-ROM INSTRUCT
show all

Computer Programming Concepts and Visual Basic David I. Schneider

Create successful ePaper yourself

Delete template?

Save as template?