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Controls in Visual Basic 2010 are tools that can be placed in the
form to perform various tasks. We can use them to create all kinds of
Windows applications. The diagram below shows the Toolbox that contains
the controls of Visual Basic 2010. They are categorized into Common
Controls, Containers, Menus, Toolbars, Data, Components, Printings and
Dialogs. At the moment, we will focus on the common controls. Some of
the most used common controls are Button, Label, ComboBox, ListBox,
PictureBox, TextBox and more.
To insert a control into your form, you just need to drag the control from the tool box and drop it into the form. You can reposition and resize it as you like. Let’s examine a few examples that made use of Button, Label, TextBox , ListBox and PictureBox . You don’t have to worry so much about the code yet because I will explain the program syntax as you progress to later lessons.
When you click on the Toolbox tab, the common controls Toolbox will appear.
2.1 Creating your first program
To create your first program, drag the button control into the form, and change its default Text Button1 to OK in the properties window, the word OK will appear on the button in the form, as shown below:
Now click on the OK button and the code window appears. Enter the code as follows:
When you run the the program and click on the OK button, a dialog box will appear and display the “WELCOME TO VISUAL BASIC 2010” message,as shown below:
There you are, you have created your first Visual Basic 2010 program.
2.2 Using the Text Box
Next I will show you how to create a simple calculator that adds two numbers using the TextBox control. In this program, you insert two text boxes , three labels and one button. The two text boxes are for the users to enter two numbers, one label is to display the addition operator and the other label is to display the equal sign. The last label is to display the answer. Now change the label on the button to Calculate,then click on this button and enter the following code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim num1, num2, product As Single
num1 = TextBox1.Text
num2 = TextBox2.Text
product = num1 + num2
Label1.Text = product
End Sub
When you run the program and enter two numbers, pressing the calculate button will allows the program to add the two numbers.
To insert a control into your form, you just need to drag the control from the tool box and drop it into the form. You can reposition and resize it as you like. Let’s examine a few examples that made use of Button, Label, TextBox , ListBox and PictureBox . You don’t have to worry so much about the code yet because I will explain the program syntax as you progress to later lessons.
2.1 Creating your first program
To create your first program, drag the button control into the form, and change its default Text Button1 to OK in the properties window, the word OK will appear on the button in the form, as shown below:
Now click on the OK button and the code window appears. Enter the code as follows:
When you run the the program and click on the OK button, a dialog box will appear and display the “WELCOME TO VISUAL BASIC 2010” message,as shown below:
There you are, you have created your first Visual Basic 2010 program.
2.2 Using the Text Box
Next I will show you how to create a simple calculator that adds two numbers using the TextBox control. In this program, you insert two text boxes , three labels and one button. The two text boxes are for the users to enter two numbers, one label is to display the addition operator and the other label is to display the equal sign. The last label is to display the answer. Now change the label on the button to Calculate,then click on this button and enter the following code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim num1, num2, product As Single
num1 = TextBox1.Text
num2 = TextBox2.Text
product = num1 + num2
Label1.Text = product
End Sub
When you run the program and enter two numbers, pressing the calculate button will allows the program to add the two numbers.
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