KeyDown_Event is not occuring for Enter Key

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VS2008

, +

Hi S Mewara,

I m using vb.net with window application in vs2008.
I have followed this code. it is working fine for Esc key or event is occur.
but when i have used this code for enter key event is not getting..

VB

Private Sub frmScreen_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyDown
        If e.KeyCode = Keys.Escape Then
            Me.Close() 
        ElseIf e.KeyCode = Keys.Enter Then
            'btnPriview_Click(sender, e)
            MessageBox.Show("Fire Enter")
        End If
    End Sub

1. e.KeyCode = Keys.Escape - it is working when Esc key is down.
2. e.KeyCode = Keys.Enter - it is not working when Enter key is down..

How to resolve this problem.......
suggest me

Thanks
mukesh

[edit]Code block added - OriginalGriff[/edit]

Posted 10-Jun-11 21:39pm

mukesh_panth

Updated 10-Jun-11 21:55pm

OriginalGriff

v2

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Comments

Sergey Alexandrovich Kryukov 11-Jun-11 23:53pm

You need to tag it: WPF, Forms, ASP.NET? It looks like Forms, but you really want to put it in the tag.
--SA

2 solutions

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Ruard · Answer 1 · 2011-06-10T21:55:00

Solution 1

Assuming that the key does enter the frmScreen_KeyDown sub, check for:

e.KeyCode = Keys.Return

Posted 10-Jun-11 21:55pm

Ruard

Updated 10-Jun-11 21:56pm

v2

OriginalGriff · Answer 2 · 2011-06-10T22:08:00

It is slightly more complex than you think - it also depends on what controls you have on your form.
If you create a blank form, and handle the Key Down event, you will get all the keys, enter (as e.Return), ESC (as e.Escape), etc.

If you add a button to it, then suddenly the event stops, because the button can take input and thus has the focus - it gets all the Key events instead of the form. So, you need to add the handler to all the controls as well - that's ok, the same handler had be added to them all without any real problem.

But that won't solve your problem either, because some controls (buttons for example) will not only accept input, but will swallow some keys: A standard button for example will swallow the Enter key and produce a Click event. A Cancel button will normally swallow a Escape key, and produce a Click event.

If I were you, I would re-think my keyboard usage - it is easier to work with the standard framework key usage, than the subvert it - and it is easier for your users who may expect keys to do things as they do in other applications.