KEY EVENT IN VB


KeyPress event in VB.NET

Handle Keyboard Input at the Form Level in VB.NET

vb.net keypress event

Windows Forms processes keyboard input by raising keyboard events in response to Windows messages. Most Windows Forms programs process keyboard input by handling the keyboard events.

How do I detect keys pressed in VB.NET

You can detect most physical key presses by handling the KeyDown or KeyUp events. Key events occur in the following order:

KeyDown
KeyPress
KeyUp
How to detect when the Enter Key Pressed in VB.NET

The following VB.NET code behind creates the KeyDown event handler. If the key that is pressed is the Enter key, a MessegeBox will displayed .

If e.KeyCode = Keys.Enter Then
MsgBox(“enter key pressd “)
End If

How to get TextBox1_KeyDown event in your VB.Net source file ?

Select your VB.Net source code view in Visual Studio and select TextBox1 from the top-left Combobox and select KeyDown from top-right combobox , then you will get keydown event sub-routine in your source code editor.

Private Sub TextBox1_KeyDown(…)..
End Sub

vb-key-down
Difference between the KeyDown Event, KeyPress Event and KeyUp Event in VB.Net

VB.Net KeyDown Event : This event raised as soon as the person presses a key on the keyboard, it repeats while the user hold the key depressed.

VB.Net KeyPress Event : This event is raised for character keys while the key is pressed and then released by the use . This event is not raised by noncharacter keys, unlike KeyDown and KeyUp, which are also raised for vb.net noncharacter keys

VB.Net KeyUp Event : This event is raised after the person releases a key on the keyboard.

VB.Net KeyPress Event

Public Class Form1
Private Sub TextBox1_KeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
If e.KeyChar = Convert.ToChar(13) Then
MsgBox(“enter key pressd “)
End If
End Sub
End Class
VB.Net KeyDown Event

Public Class Form1
Private Sub TextBox1_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown
If e.KeyCode = Keys.Enter Then
MsgBox(“enter key pressd “)
End If
End Sub
End Class
How to Detecting arrow keys in VB.Net

Detecting arrow keys in VB.Net

In order to capture keystrokes in a VB.Net Forms control, you must derive a new class that is based on the class of the control that you want, and you override the ProcessCmdKey().

Protected Overrides Function ProcessCmdKey(ByRef msg As Message, ByVal keyData As Keys) As Boolean
‘handle your keys here
End Function
More about…. Detecting arrow keys from VB.Net

VB.Net KeyUp Event

The following VB.NET source code shows how to capture Enter KeyUp event from a TextBox Control.

Next : How to create Dynamic Controls in VB.NET ?

Download Source CodePrint Source Code
Public Class Form1
Private Sub TextBox1_KeyUp(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyUp
If e.KeyCode = Keys.Enter Then
MsgBox(“enter key pressd “)
End If
End Sub
End Class

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