Software Development

The Program Code Structure

Imagine you have VB open and displaying a coding module.  You could declare all your variables in the module. Then you could use the same variables in both your input and output form.

Module

Declare all Variables 'stored data variables Public lawnSeedCoverage as Integer etc. 'input variables Public rectLawnLength as Single etc 'output variables Public bagsLawnSeed as Single etc

Now imagine you have VB open and displaying the coding window of your input form.  You could structure you code similar to the structure shown below. The first sub routine sets the stored data values, the second sub routine gets the users inputs and the third sub routine carries out the calculations.

Input Form Coding Sheet

Step 1. Input Form - Set the Stored Data Values Private Sub Form_Load()         ' you could put code here that executes when the first program starts         ' set the values of the stored data variables here         ' ready to use later on         'example         lawnSeedCoverage = 30         lawnSeedinBag = 1000             etc….. End Sub   Step 2.  Input Form - Get the users input Private Sub cmdSubmit_Click()         ' the user clicks the command button         ' get the values from the input textboxes here         'example: the two lines below get the values from two textboxes         rectLawnLength = txtRectLawnLength.Text         rectLawnWidth = txtRectLawnWidth.Text             etc…..        calculate  ‘run the calculate sub routine End Sub   Step 3. Input Form - carry out the calculations Private Sub calculate()         'you can put code in that does all the calculations         'example: the two lines below calculate an area and seed amount          rectLawnArea = rectLawnLength * rectLawnWidth          rectLawnSeedAmount = rectLawnArea * lawnSeedCoverage             etc…..          Me.Hide    'hide the input form          Load Form2   'load and show the output form End Sub

Now imagine you have VB open and displaying the coding window of your output form.  You could structure you code similar to the structure shown below. The sub routine should contain code for displaying the results of the calculations to the user.

Output Form Coding Sheet

Step 4. Output Form - display the results If you have labels for displaying your answers then use the code in the Form Load below  If you have textboxes for displaying your answers then use the code in the second Form Load. Private Sub Form_Load()         'display the results in labels here         'example: the two lines below display the amount and         'number of bags in labels             lblAmountLseeds.Caption = totalLawnSeedAmount & " grams"             lblBagsLseeds.Caption = bagsLawnSeed             etc…..     End Sub        If you have textboxes for displaying your answers then use the code below:- Private Sub Form_Load()         'display the results in textboxes here         'example: the two lines below display the amount and         'number of bags in textboxes             txtAmountLseeds.Text = totalLawnSeedAmount & " grams"             txtBagsLseeds.Text = bagsLawnSeed             etc…..     End Sub

   

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