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Visual Basic 2005 Demysti ed
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BackColor property, changing for labels, 53 bitmap files, using as toolbar images, 230 231 blnResident prefix, using with data types, 72 Boolean data types, using, 67 Boolean values, returning for functions, 173 174 btnClose, adding code to Click event of, 181 btnNewCaption, adding code to Click event of, 192, 194 btnWrite button, adding to form, 245 Build menu options on, 13 running projects from, 12 Button1-3 MessageBoxDefaultButton enumerations, descriptions of, 185 buttons See toolbar buttons ByVal and ByRef attributes, using with procedures, 166 167
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c argument, using as format specifier in Pizza Calculator, 134 Cancel button determining selection of, 242 243 effect on input boxes, 119
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Cancel choice, using with DialogResult enumeration, 186 Change Machine project creating, 87 89 creating algorithm for, 90 92 description of, 86 Char data types, using, 68 characters, ASCII values of, 103 CheckBox controls versus RadioButton controls, 130 using with If control structures, 128 130 Checked property, using with CheckBox control, 129 Choose Data Source dialog box, using with Northwind Traders database, 257 258 class methods, significance of, 86 classes and events, 35 and properties, 28 29 use of, 25 26 Clear method of DataSet object, effect of, 273 Click event procedure of btnCalculate, 89 of btnClear, 89 of btnClose, 181 of btnNewCaption, 192, 194 of Calculate button in Pizza Calculator, 133 calling for context menu items, 216 calling PrintInput subroutine from, 163 handling for Cut toolbar button, 233 of Paste toolbar button, 234 of Read button, 244, 248 249 using with menu items, 207 208 of Write button, 250 252 Close method of form object, significance of, 187 code associating with clicks of toolbar buttons, 233 234 identifying errors in, 57 59 translating with compilers, 16 writing inside event procedures, 38 39 code view implementing, 23 for web forms, 290 291
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commands, creating for database project, 269 271 CommandText property, using with database project, 270 comments, indicating with apostrophe ('), 40 comparison operators capabilities of, 98 and ForNext statements, 141 numeric comparison operators, 100 101 overview of, 100 precedence of, 105 string comparison operators, 102 comparisons combining with logical operators, 106 using Like operator with, 104 105 using Option Compare statement with, 103 using pattern matching with, 104 compiler errors See also errors Name intVar is not declared, 73 Option Strict On disallows implicit conversions , 94 compilers, purpose of, 16 computer program, definition of, 15 connections linking commands to, 270 271 opening for database project, 269 ConnectionString property of OleDbConnection class using with database project, 268 using with database web applications, 296 console, example of, 32 constants assigning values to, 76 declaring, 75 76 declaring for Pizza Calculator project, 132 133 guidelines for use of, 76 77 context menu items adding functionality to, 214 216 using AddHandler keyword with, 216, 219 using handles clause with, 216 context menus, features of, 209 210 See also menus
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INDEX
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database web applications See also web applications adding code, 297 298 adding GridView control to, 292 295 databases locating on web servers, 295 297 tables in, 261 DataBind method of GridView, relationship to database web applications, 298 DataGridView control connecting to DataSet, 274 filling, 271 274 using with database project, 265 DataSet class connecting DataGridView to, 274 creating for database project, 272 273 dblGPA prefix, using with data types, 72 Debug menu, running projects from, 39 debugging overview of, 98 99 projects, 125 DebugWriteLine statement See WriteLine method of Debug class Default Web Site, starting for IIS, 282 283, 286 design time changing properties at, 31 explanation of, 13, 22 designer view choosing and implementing, 23 displaying Object Browser from, 25 opening Properties window from, 29 30 dialog forms See also forms; modal versus modeless forms About dialog box as, 180 accessing values from, 194 changing properties of, 190 191 creating project for, 188 192 versus MessageBox class, 192, 193 preventing from closing, 193 194 showing and returning results of, 192 193 DialogResult values processing, 187 188 returning, 193 194 returning with ShowDialog method, 242 Dim access specifier, using with variables, 70 disconnected application versus persistent connection, 267 268 DisplayStyle property, setting for images on toolbar buttons, 228 division operators (/ and \), using, 82 Do statements testing conditions at bottom of, 151 152 testing conditions at top of, 150 151 DOS versus Windows applications, 32 34 Double class, Parse method of, 85 Double data types, using, 67 DropDownItems collection property, description of, 203
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ContextMenuStrip objects adding menu items to, 211 214 adding to forms, 210 211 pasting items into, 214 215 control structures If control structures, 119 123 Select Case, 134 137 controls copying from Toolbox to forms, 46 relocating, 46 48 resizing, 48 49 coordinates in graphing, relationship to Label controls, 52 53 Copy command, duplicating in context and main menus, 213 214 Copy toolbar button, assigning image to, 232 copying menus, 214 counter variables, using Step statements with, 144 CTRL shortcut key, using with menu items, 206 207 Customers table in Northwind Traders database, features of, 262 263 Cut command, duplicating in context and main menus, 213 214 Cut toolbar button assigning image to, 232 using Click event procedure with, 233
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Else clauses, characteristics of, 123 Enabled property of menu items, setting to False, 209 End Function element, description of, 169 End If, omission from IfThen statements, 120 End Sub element of subroutines, description of, 160 environment setting defaults, choosing, 7 8 equality operator (=), result of, 101 Error choice, using with MessageBoxIcon enumeration, 185 errors, identifying in code, 57 59 See also compiler errors event procedure stubs creating, 36 38 creating for Click event of btnCalculate, 89 creating for Click event of btnClear, 89 creating for MouseMove form event, 54 event procedures creating for database web applications, 297 detection of, 36 Handles clause in, 57 line-continuation character in, 56 parameters of, 56 57
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data namespaces, importing for database project, 266 data sources, connecting to, 268 data types numeric data types, 67 overview of, 66 prefixes for, 71 text data types, 68 of Visual Basic properties, 68 69 database project See also Northwind Traders database; projects creating command for, 269 271 creating connection for, 267 269 creating form for, 264 265 description of, 264 filling DataGridView control in, 271 274 importing data namespaces for, 266
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purpose of, 35 writing code inside of, 38 39 events, relationship to Windows programming, 35 exceptions determining occurrence of, 126 127 overview of, 124 125 unhandled exceptions, 125 126 Exclamation choice, using with MessageBoxIcon enumeration, 185 Exit For statements, using, 145 Exit Function element, description of, 169 Exit Sub statements, using with subroutines, 160, 162 Exit While statements, using, 149 150 expander, location of, 25 explicit versus implicit type conversion, 93 exponent operator (^), using, 81 82 expressions, using with Select Case control structure, 135
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