the integration of visual basic programming language into physics ...

Insert one label for the refractive index “n= “. To edit the text inside the label go to properties
and look for “Text” and type in the desired name.
Add seven Text Boxes for each value (it‟s where the user types in the experimental values and
where the final values will be displayed).
Add four labels to display the measurement units.
Add four buttons placed like in Figure 4. They will be used to calculate the data (Calculate
button), save the data (Save button), reset the fields (Reset button) or to return to the main page (Main
page button).To edit the names of the buttons we use the same technique previously used on the
window title, which is by editing its properties.
Figure 4. The buttons of the GUI
2.2 Writing the software code
Writing the code is, sometimes, the tricky part. We have to write code lines for the buttons and
the errors that will be displayed if the user commits a mistake [11, 13].
We start by declaring some variables at the beginning of the page. First double click on the
first button to get to the coding page.
Above “Public Class minimum_dev” write:
Option Explicit On
Option Strict Off
Below it write:
Inherits System.Windows.Forms.Form
We‟ll need these lines mainly for exporting the data into the excel table [11, 13].
Below “Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click” we write the code that‟ll calculate the values.
Because our value is an angle and it‟s limited between 30 and 50 degrees, we have to add a
condition that‟ll check if the value typed in by the user corresponds to the experimental data.
How will the program check for errors
First it checks the field not to be empty. If it is empty, then an error will be displayed. If it‟s
not empty it moves on to the next condition which is the angle‟s value. If it‟s not in the interval
another error message will be displayed (Figure 5). If everything is ok it will move on and calculate
the values.
Next, after checking for any possible errors we move on to the codes that calculate and display
the values. We write them below the error lines [12].