VB.NET Form Controls

A Form is used in VB.NET to create a form-based or window-based application. Using the form, we can build a attractive user interface. It is like a container for holding different control that allows the user to interact with an application. The controls are an object in a form such as buttons , Textboxes, Textarea , labels , etc. to perform some action. However, we can add any control to the runtime by creating an instance of it.

A Form uses a System.Windows.Form namespace, and it has a wide family of controls that add both forms and functions in a Window-based user interface.

VB.NET Form Properties

The following are the most important list of properties related to a form. And these properties can be set or read while the application is being executed.

Properties Description BackColor It is used to set the background color for the form. BackgroundImage It is used to set the background image of the form. Cursor It is used to set the cursor image when it hovers over the form. AllowDrop Using the AllowDrop control in a form, it allows whether to drag and drop on the form. It is used to get or set the font used in a form. Locked It determines whether the form is locked or not. FormBorderStyle It is used to set or get border style in a form. It is used to set the title for a form window. MinimizeBox MinimizeBox It is used to display the minimum option on the title bar of the form. IsMDIChild It is used to authenticate whether a form is a container of a Multiple Document Interface (MDI) child form. Autoscroll It allows whether to enable auto-scrolling in a form. MaximizeBox It is used to display the maximum option on the title bar of the form. MaximumSize It is used to set the maximum height and width of the form. Language It is used to specifies the localized language in a form. AcceptButton It is used to set the form button if the enter key is pressed. Top, Left It is used to set the top-left corner coordinates of the form in pixel. It is used to define the name of the form. MinimumSize It is used to set the minimum height and width of the form. Enabled It uses the True or False value to enable mouse or keyboard events in the form. TopMost It uses a Boolean value that represents whether you want to put the window form on top of the other form. By default, it is False.

Form Events

The following are the most important list of events related to a form.

Events Description Activated An activated event is found when the user or program activates the form. Click A click event is active when the form is clicked. Closed A closed event is found before closing the form. Closing It exists when a form is closing. DoubleClick DoubleClick
The DoubleClick event is activated when a user double clicks on the form. DragDrop A DragDrop event is activated when a drag and drop operation is performed. MouseDown A MouseDown event is activated when the mouse pointer is on the form, and the mouse button is pressed. GotFocus A GotFocus event is activated when the form control receives a focus. HelpButtonClicked It is activated when a user clicked on the help button. KeyDown A KeyDown event is activated when a key is pressed while focussing on the form. KeyUp A KeyUp event is activated when a key is released while focusing on the form. The load event is used to load a form before it is first displayed. LostFocus It is activated when the form loses focus. MouseEnter A MouseEnter event is activated when the mouse pointer enters the form. MouseHover A MouseHover event is activated when the mouse pointer put on the form. MouseLeave A MouseLeave event is activated when the mouse pointer leaves the form surface. Shown It is activated whenever the form is displayed for the first time. Scroll A Scroll event is activated when a form is scrolled through a user or code. Resize A Resize event is activated when a form is resized. A Move event is activated when a form is moved.

For creating a Windows Forms application in VB.NET , we need to follow the following steps in Microsoft Visual Studio .

GoTo File Menu.

Click on New Project.

Click on Windows Forms App or Application

And finally, click on the 'Create' button to create your project, and then, it displays the following window form with a name Form1.

Now create a simple program of Windows form control in VB.NET.

Form1.vb

Public Class Form1 ' Create nameStr and num variables Dim nameStr As String Dim num As Integer Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load End Sub ' It is Label1 Private Sub Label1_Click(sender As Object, e As EventArgs) Handles Label1.Click End Sub ' It is TextBox1 for inserting the value. Private Sub TextBox1_TextChanged(sender As Object, e As EventArgs) Handles TextBox1.TextChanged End Sub ' It is Label2 Private Sub Label2_Click(sender As Object, e As EventArgs) Handles Label2.Click End Sub ' It is a Button1 for transferring the control. Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click nameStr = TextBox1.Text num = TextBox2.Text Label3.Text = "You have entered the Name " & nameStr + " Number " & num End Sub ' It is TextBox2 for inserting the value. Private Sub TextBox2_TextChanged(sender As Object, e As EventArgs) Handles TextBox2.TextChanged End Sub ' It is label3 Private Sub Label3_Click(sender As Object, e As EventArgs) Handles Label3.Click End Sub End Class

Output:

Now enter the following details in the form:

After filling all the details, click on the Submit button. After that, it shows the following Output:

Next Topic VB.NET Label Control