Hello, i want to check what letter is typing by user in textbox in event text change.
Any body know how to do that?
this is my code :

Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventHandler) Handles TextBox1.TextChanged
       MessageBox.Show(??)
    End Sub

?? = ?
Please help me! thanks :)

Use the KeyUp event instead...

example:

Private Sub TextBox1_KeyUp(sender As Object, e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyUp
		MsgBox(e.KeyCode.ToString)
	End Sub

You also can use the KeyDown event like so:

Private Sub TextBox1_KeyDown(sender As Object, e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown
		If e.KeyCode = Keys.Space Then
			Debug.WriteLine("space is not allowed")
			e.SuppressKeyPress = True
		End If
	End Sub

thanks, but if i hold the key, then just 1 msgbox have launch although there was many letter i was typed. How to resolve it? :)

Private Sub TextBox1_KeyDown(sender As Object, e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown

		If e.Alt OrElse e.Control OrElse e.Shift Then
			Debug.WriteLine(e.Modifiers.ToString & " => " & e.KeyCode.ToString)
			Return
		End If

		'do your filtering here
		If e.KeyCode = Keys.Space Then
			Debug.WriteLine("space is not allowed")
			e.SuppressKeyPress = True
		End If
	End Sub

owh you right, using the key down event. One more my case : And how to prevent user pressing 1 key and there were more than 1 letter approach in textbox?

look at the example above....

If e.KeyCode = Keys.Space Then
			MsgBox("space is not allowed")
			e.SuppressKeyPress = True
		End If

This prevents the user to type spaces in. of course you have to adjust it to the characters you want to prevent the user from.

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