Tutorial: Programming in Visual Basic 6.0

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End Select Activity 6 Is < 6 Case = “Preschool” lblTitle.Caption 6 To 11 Case = “Primary School” lblTitle.Caption 12 To 18 Case = “Secondary School” lblTitle.Caption Else Case = “Adult” lblTitle.Caption 1. The post office has the following charges for parcels based upon different weights. (gram) Cost Weight – 50 $1.40 0 – 100 $2.70 51 – 250 $4.00 101 251 – 500 $7.50 Parcels which are heavier than 500 gms are calculated by weight*0.02 a project that allows a user to enter the weight in a text box and calculate the Design Use Case statements in your code. Link this as CaseWeights under the postage. Multiway menu heading in your main form. Use a set of check boxes to allow a user to choose the noise level by the comments, 2. output the probable decibel level based on information in the following table. then level Comfort level Decibel Extremely painful 140+ – 139 Deafening 90 – 89 Disturbing 60 – 59 Distracting 30 – 29 Relaxing 0 use Case statements and link this to the main form menu under the name Again again connected to the Multiway menu heading. NoiseLevels Activity 7 control array is a set of multiple controls of the same type with the same name (often A by using the Copy and Paste command). You may have encountered this already created adding radio buttons or check boxes to your form. Individual controls within the array in distinguished by having different Index property values. So, if you created a control are of option buttons called optChoice, the Click event procedure might look like this: array Private Sub optChoice_Click (Index As Integer) Select Case optChoice (Index) Case Index = 0 Label1.Caption = "Monday" Case Index = 1 Label1.Caption = "Tuesday" Case Index = 2 Label1.Caption = "Wednesday" Case Index = 3 Label1.Caption = "Thursday"
End Select End Sub Case Index = 4 Label1.Caption = "Friday" Case Index = 5 Label1.Caption = "Saturday" Case Else Label1.Caption = "Sunday" code above would change the label caption as each different option button was The Try this out, then add code to change the label background colour (to selected. appropriate) for each different day. Link to the menu Multiway Selection something in the main form menu under the heading Colour My Days. heading we continue with the last structures — iterations — check that the menu Before on Main are all correct and linked (by code) to the correct forms. Check the list headings below and change any that need to be changed. Menu Quit (Sequences) Introduction 1 (– Welcome to VB) Example Example 2 (– Colour changer) from Activity 1 from Activity 2 and Input boxes Message (– Computer Conversation) from Activity 3 Sequence Selection (- The calculator) Binary Iteration Iterations (- Measurement Converter) Binary (- Parcel weights) Multiway (- Noise levels) Multiway (-Colour my days) Multiway from Activity 4 from Activity 5 from Activity 6 from Activity 6 from Activity 7 or loops are structures that allow a statement or group of statements to be Iterations out repeatedly while some condition remains true (or for a counted number of carried Each iteration MUST contain a way of stopping the looping. There are 2 times). iteration structures: basic Pre-test iterations: in these loops, the condition to be met occurs at the beginning • the loop and the code will not run at all if the condition of • Post-test iterations: in these loops, the condition to be met is at the end of the loop Activity 8 is never met. so that the code always runs at least once. a new form and link to iteration — pre-test (- Count the beeps) on the Main menu. Create a text box and a command button. Put a label above the text box asking the user to Add a number between 1 and 10. When the user clicks the command button, check the input for a valid number and issue an error message if the number isn’t inside the textbox range. If the number is valid, use Do While …… Loop to issue that expected of beeps. Name your form frmBeeper. number
Page 1 and 2: Tutorial: Programming in Visual Bas
Page 3 and 4: Select label icon from the toolbox.
Page 5 and 6: 4. Use the Project Explorer window
Page 7 and 8: Buttons in Message Boxes Named Lite
Page 9: Activity 5 • Add a new menu headi
Page 13 and 14: a new form and create a link to the
Page 15: Bibliography Lynch, I (1999). An in

Tutorial: Programming in Visual Basic 6.0

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